1、什么是Springmvc
Spring web mvc和Struts2都属于表现层的框架,它是Spring框架的一部分。
2、Springmvc架构和组件
架构流程
1、用户发送请求至前端控制器DispatcherServlet
2、DispatcherServlet收到请求调用HandlerMapping处理器映射器。
3、处理器映射器根据请求url找到具体的处理器，生成处理器对象及处理器拦截器(如果有则生成)一并返回给DispatcherServlet。
4、DispatcherServlet通过HandlerAdapter处理器适配器调用处理器
5、执行处理器(Controller，也叫后端控制器)。
6、Controller执行完成返回ModelAndView
7、HandlerAdapter将controller执行结果ModelAndView返回给DispatcherServlet
8、DispatcherServlet将ModelAndView传给ViewReslover视图解析器
9、ViewReslover解析后返回具体View
10、DispatcherServlet对View进行渲染视图（即将模型数据填充至视图中）。
11、DispatcherServlet响应用户
组件说明
以下组件通常使用框架提供实现：
DispatcherServlet：前端控制器
用户请求到达前端控制器，它就相当于mvc模式中的c，dispatcherServlet是整个流程控制的中心，由它调用其它组件处理用户的请求，dispatcherServlet的存在降低了组件之间的耦合性。
HandlerMapping：处理器映射器
HandlerMapping负责根据用户请求url找到Handler即处理器，springmvc提供了不同的映射器实现不同的映射方式，例如：配置文件方式，实现接口方式，注解方式等。
Handler：处理器
Handler 是继DispatcherServlet前端控制器的后端控制器，在DispatcherServlet的控制下Handler对具体的用户请求进行处理。
由于Handler涉及到具体的用户业务请求，所以一般情况需要程序员根据业务需求开发Handler。
HandlAdapter：处理器适配器
通过HandlerAdapter对处理器进行执行，这是适配器模式的应用，通过扩展适配器可以对更多类型的处理器进行执行。
ViewResolver：视图解析器
View Resolver负责将处理结果生成View视图，View Resolver首先根据逻辑视图名解析成物理视图名即具体的页面地址，再生成View视图对象，最后对View进行渲染将处理结果通过页面展示给用户。
View：视图
springmvc框架提供了很多的View视图类型的支持，包括：jstlView、freemarkerView、pdfView等。我们最常用的视图就是jsp。
一般情况下需要通过页面标签或页面模版技术将模型数据通过页面展示给用户，需要由程序员根据业务需求开发具体的页面。
说明：在springmvc的各个组件中，处理器映射器、处理器适配器、视图解析器称为springmvc的三大组件。
需要用户开发的组件有handler、view
3、环境搭建
3.1 导包
3.2 创建配置文件（放在src目录下）
创建SpringMVC的核心配置文件
SpringMVC本身就是Spring的子项目，对Spring兼容性很好，不需要做很多配置。
这里只配置一个Controller扫描就可以了，让Spring对页面控制层Controller进行管理。
配置文件需要的约束文件：
springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!--自动扫描标记@Controller的控制类
使用组件扫描器省去在spring容器配置每个Controller类的繁琐。
配置controller扫描包时，多个包之间用","隔开
-->
<context:component-scan base-package="cn.ctgu"/>
<!-- 处理器映射器
注解式处理器映射器，对类中标记了@ResquestMapping的方法进行映射。根据@ResquestMapping定义的url匹配@ResquestMapping标记的方法，匹配成功返回HandlerMethod对象给前端控制器。
HandlerMethod对象中封装url对应的方法Method。
注解描述：
@RequestMapping：定义请求url到处理器功能方法的映射
-->
<!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/> -->
<!-- 处理器适配器
注解式处理器适配器，对标记@ResquestMapping的方法进行适配。
-->
<!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/> -->
<!-- 注解驱动，这一句相当于上面的两句：手动注解处理器映射器和处理器适配器，以此不使用默认的映射器和适配器，否则它会调用springmvc默认的映射器和适配器（其实也是上面的那两个）使用注解驱动来加载。
SpringMVC使用<mvc:annotation-driven>自动加载RequestMappingHandlerMapping和RequestMappingHandlerAdapter-->
<mvc:annotation-driven/>
<!-- 视图解释器
视图解析器使用SpringMVC框架默认的InternalResourceViewResolver，这个视图解析器支持JSP视图解析，逻辑视图名需要在controller中返回ModelAndView指定，比如逻辑视图名为ItemList，则最终返回的jsp视图地址:
“WEB-INF/jsp/itemList.jsp”
最终jsp物理地址：前缀+逻辑视图名+后缀
-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 相当于mav.setViewName("/jsp/itemList.jsp");
prefix是前缀即/jsp/ suffix是后缀即.jsp
-->
<property name="prefix" value="/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>配置前端控制器
配置SpringMVC的前端控制器DispatcherServlet
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>springmvc01</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!--配置前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--指定springmvc配置文件，默认找/WEB-INF/springmvc-servlet.xml(根据上面的那个<servlet-name>spingmvc) -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<!--
设置所有以action结尾的请求进入springmvc
1、/* 拦截所有jsp js png .css等全拦截，不建议使用
2、*.action *.do拦截以do action 结尾的请求，肯定能使用
3、/ 拦截所有（不包括jsp）(包含.js .png .css)强烈建议使用
-->
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>4、代码示例
需求：实现显示商品列表页
itemList.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>查询商品列表</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/item/itemlist.action" method="post">
查询条件：
<table width="100%" border=1>
<tr>
<td><input type="submit" value="查询"/></td>
</tr>
</table>
商品列表：
<table width="100%" border=1>
<tr>
<td>商品名称</td>
<td>商品价格</td>
<td>生产日期</td>
<td>商品描述</td>
<td>操作</td>
</tr>
<c:forEach items="${itemList }" var="item">
<tr>
<td>${item.name }</td>
<td>${item.price }</td>
<td><fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/></td>
<td>${item.detail }</td>
<td><a href="${pageContext.request.contextPath }/itemEdit.action?id=${item.id}">修改</a></td>
</tr>
</c:forEach>
</table>
</form>
</body>
</html>创建pojo（通过逆向工程生成的）
Items.java
package cn.itcast.springmvc.pojo;
import java.util.Date;
public class Items {
private Integer id;
private String name;
private Float price;
private String pic;
private Date createtime;
private String detail;
public Items(Integer id, String name, Float price, Date createtime, String detail) {
super();
this.id = id;
this.name = name;
this.price = price;
this.createtime = createtime;
this.detail = detail;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name == null ? null : name.trim();
}
public Float getPrice() {
return price;
}
public void setPrice(Float price) {
this.price = price;
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic == null ? null : pic.trim();
}
public Date getCreatetime() {
return createtime;
}
public void setCreatetime(Date createtime) {
this.createtime = createtime;
}
public String getDetail() {
return detail;
}
public void setDetail(String detail) {
this.detail = detail == null ? null : detail.trim();
}
}创建ItemController
ItemController是一个普通的java类，不需要实现任何接口。
需要在类上添加@Controller注解，把Controller交由Spring管理
在方法上面添加@RequestMapping注解，里面指定请求的url。其中“.action”可以加也可以不加。
ItemController.java
package cn.ctgu.springmvc.controller;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import cn.itcast.springmvc.pojo.Items;
/*
* 商品管理
*
* */
@Controller
public class ItemController {
// @RequestMapping：里面放的是请求的url，和用户请求的url进行匹配
// action可以写也可以不写
//入门程序 包类+类包+方法名
@RequestMapping(value="/item/itemlist.action")
public ModelAndView itemList() {
//创建页面需要显示的商品数据
List<Items>list=new ArrayList<Items>();
list.add(new Items(1,"1华为荣耀8",2997f,new Date(),"质量好！1"));
list.add(new Items(2,"2华为荣耀8",2997f,new Date(),"质量好！1"));
list.add(new Items(3,"3华为荣耀8",2997f,new Date(),"质量好！1"));
list.add(new Items(4,"4华为荣耀8",2997f,new Date(),"质量好！1"));
list.add(new Items(5,"5华为荣耀8",2997f,new Date(),"质量好！1"));
list.add(new Items(6,"6华为荣耀8",2997f,new Date(),"质量好！1"));
// 创建ModelAndView，用来存放数据和视图
ModelAndView mav=new ModelAndView();
// 设置数据到模型中
mav.addObject("itemList",list);
// 设置视图jsp，需要设置视图的物理地址
mav.setViewName("itemList");
// mav.setViewName("/jsp/itemList.jsp");//由于在springmvc中配置了视图解释器，所以这里可以简写
return mav;
}
}测试
启动项目，浏览器访问地址
http://localhost:8080/springmvc01/item/itemList.action效果如下图：
5、整合mybatis
整合目标：控制层采用springmvc、持久层使用mybatis实现。
5.1 需要的jar包
1.spring（包括springmvc）
2.mybatis
3.mybatis-spring整合包
4.数据库驱动
5、第三方连接池。
5.2 整合思路
Dao层：
1、SqlMapConfig.xml，空文件即可，但是需要文件头。
2、applicationContext-dao.xml
a)数据库连接池
b)SqlSessionFactory对象，需要spring和mybatis整合包下的。
c)配置mapper文件扫描器。
Service层：
1、applicationContext-service.xml包扫描器，扫描@service注解的类。
2、applicationContext-trans.xml配置事务。
Controller层：
1、Springmvc.xml
a)包扫描器，扫描@Controller注解的类。
b)配置注解驱动
c)配置视图解析器
Web.xml文件：
1、配置spring
2、配置前端控制器。
5.3 整合代码示例
使用逆向工程来生成Mapper相关代码，不需要配置别名。
sqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 设置别名-->
<typeAliases>
<!-- 2. 指定扫描包，会把包内所有的类都设置别名，别名的名称就是类名，大小写不敏感-->
<package name="cn.ctgu.springmvc.pojo" />
</typeAliases>
</configuration>applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.3.xsd">
<context:property-placeholder location="classpath:db.properties"/>
<!-- 数据库连接池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxActive" value="10" />
<property name="maxIdle" value="5" />
</bean>
<!-- Mybatis的工厂 -->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- 核心配置文件的位置 -->
<property name="configLocation" value="classpath:sqlMapConfig.xml"/>
</bean>
<!-- Mapper动态代理开发 扫描 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 基本包 -->
<property name="basePackage" value="cn.ctgu.springmvc.dao"/>
</bean>
<!-- 注解事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 开启注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springmvc?characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!--扫描@Controller-->
<context:component-scan base-package="cn.ctgu"/>
<!-- 处理器映射器 -->
<!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/> -->
<!-- 处理器适配器 -->
<!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/> -->
<!-- 注解驱动，这一句相当于上面的两句：手动注解处理器映射器和处理器适配器，以此不使用默认的映射器和适配器，否则它会调用springmvc默认的映射器和适配器（其实也是上面的那两个）-->
<mvc:annotation-driven conversion-service="conversionServiceFactoryBean"/>
<bean id="conversionServiceFactoryBean" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
<!-- 配置多个转换器 -->
<property name="converters">
<list>
<!-- <bean class="自定义转换器的类比如日期、、、、"></bean> -->
<bean class="cn.ctgu.springmvc.conversion.DateConveter"></bean>
</list>
</property>
</bean>
<!-- 视图解释器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 相当于mav.setViewName("/jsp/itemList.jsp");
prefix是前缀即/jsp/ suffix是后缀即.jsp
-->
<property name="prefix" value="/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>springmvc-mybatis1</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--配置Spring监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 配置过滤器解决post提交乱码问题 -->
<filter>
<filter-name>encoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<!-- 配置过滤条件 -->
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<!--配置拦截器 -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>itemList.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>查询商品列表</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/item/itemlist.action" method="post">
查询条件：
<table width="100%" border=1>
<tr>
<td><input type="submit" value="查询"/></td>
</tr>
</table>
商品列表：
<table width="100%" border=1>
<tr>
<td>商品名称</td>
<td>商品价格</td>
<td>生产日期</td>
<td>商品描述</td>
<td>操作</td>
</tr>
<c:forEach items="${itemList }" var="item">
<tr>
<td>${item.name }</td>
<td>${item.price }</td>
<td><fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/></td>
<td>${item.detail }</td>
<td><a href="${pageContext.request.contextPath }/itemEdit.action?id=${item.id}">修改</a></td>
</tr>
</c:forEach>
</table>
</form>
</body>
</html>editItem.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>修改商品信息</title>
</head>
<body>
<!-- 上传图片是需要指定属性 enctype="multipart/form-data" -->
<!-- <form id="itemForm" action="" method="post" enctype="multipart/form-data"> -->
<form id="itemForm" action="${pageContext.request.contextPath }/updateitem.action" method="post">
<input type="hidden" name="id" value="${item.id }" /> 修改商品信息：
<table width="100%" border=1>
<tr>
<td>商品名称</td>
<td><input type="text" name="name" value="${item.name }" /></td>
</tr>
<tr>
<td>商品价格</td>
<td><input type="text" name="price" value="${item.price }" /></td>
</tr>
<%--
//注意：由于QueryVo里面的属性要与表单页面中的属性名称相对应，但QueryVo是封装了items的，所以要对表单页面进行相应的修改
//如item.createtime item.pic 。。。。。。
<tr>
<td>商品生产日期</td>
<td><input type="text" name="createtime"
value="<fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/>" /></td>
</tr>
<tr>
<td>商品图片</td>
<td>
<c:if test="${item.pic !=null}">
<img src="/pic/${item.pic}" width=100 height=100/>
<br/>
</c:if>
<input type="file" name="pictureFile"/>
</td>
</tr>
--%>
<tr>
<td>商品简介</td>
<td><textarea rows="3" cols="30" name="detail">${item.detail }</textarea>
</td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="提交" />
</td>
</tr>
</table>
</form>
</body>
</html>success.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>修改商品信息</title>
</head>
<body>
修改成功
</body>
</html>5.3.1 实现商品列表显示
实现商品查询列表，从mysql数据库查询商品信息。
使用逆向工程生成pojo和dao代码。
cn.ctgu.springmvc.pojo
Items.java
package cn.ctgu.springmvc.pojo;
import java.util.Date;
public class Items {
private Integer id;
private String name;
private Float price;
private String pic;
private Date createtime;
private String detail;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name == null ? null : name.trim();
}
public Float getPrice() {
return price;
}
public void setPrice(Float price) {
this.price = price;
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic == null ? null : pic.trim();
}
public Date getCreatetime() {
return createtime;
}
public void setCreatetime(Date createtime) {
this.createtime = createtime;
}
public String getDetail() {
return detail;
}
public void setDetail(String detail) {
this.detail = detail == null ? null : detail.trim();
}
}ItemsExample.java
package cn.ctgu.springmvc.pojo;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class ItemsExample {
protected String orderByClause;
protected boolean distinct;
protected List<Criteria> oredCriteria;
public ItemsExample() {
oredCriteria = new ArrayList<Criteria>();
}
public void setOrderByClause(String orderByClause) {
this.orderByClause = orderByClause;
}
public String getOrderByClause() {
return orderByClause;
}
public void setDistinct(boolean distinct) {
this.distinct = distinct;
}
public boolean isDistinct() {
return distinct;
}
public List<Criteria> getOredCriteria() {
return oredCriteria;
}
public void or(Criteria criteria) {
oredCriteria.add(criteria);
}
public Criteria or() {
Criteria criteria = createCriteriaInternal();
oredCriteria.add(criteria);
return criteria;
}
public Criteria createCriteria() {
Criteria criteria = createCriteriaInternal();
if (oredCriteria.size() == 0) {
oredCriteria.add(criteria);
}
return criteria;
}
protected Criteria createCriteriaInternal() {
Criteria criteria = new Criteria();
return criteria;
}
public void clear() {
oredCriteria.clear();
orderByClause = null;
distinct = false;
}
protected abstract static class GeneratedCriteria {
protected List<Criterion> criteria;
protected GeneratedCriteria() {
super();
criteria = new ArrayList<Criterion>();
}
public boolean isValid() {
return criteria.size() > 0;
}
public List<Criterion> getAllCriteria() {
return criteria;
}
public List<Criterion> getCriteria() {
return criteria;
}
protected void addCriterion(String condition) {
if (condition == null) {
throw new RuntimeException("Value for condition cannot be null");
}
criteria.add(new Criterion(condition));
}
protected void addCriterion(String condition, Object value, String property) {
if (value == null) {
throw new RuntimeException("Value for " + property + " cannot be null");
}
criteria.add(new Criterion(condition, value));
}
protected void addCriterion(String condition, Object value1, Object value2, String property) {
if (value1 == null || value2 == null) {
throw new RuntimeException("Between values for " + property + " cannot be null");
}
criteria.add(new Criterion(condition, value1, value2));
}
public Criteria andIdIsNull() {
addCriterion("id is null");
return (Criteria) this;
}
public Criteria andIdIsNotNull() {
addCriterion("id is not null");
return (Criteria) this;
}
public Criteria andIdEqualTo(Integer value) {
addCriterion("id =", value, "id");
return (Criteria) this;
}
public Criteria andIdNotEqualTo(Integer value) {
addCriterion("id <>", value, "id");
return (Criteria) this;
}
public Criteria andIdGreaterThan(Integer value) {
addCriterion("id >", value, "id");
return (Criteria) this;
}
public Criteria andIdGreaterThanOrEqualTo(Integer value) {
addCriterion("id >=", value, "id");
return (Criteria) this;
}
public Criteria andIdLessThan(Integer value) {
addCriterion("id <", value, "id");
return (Criteria) this;
}
public Criteria andIdLessThanOrEqualTo(Integer value) {
addCriterion("id <=", value, "id");
return (Criteria) this;
}
public Criteria andIdIn(List<Integer> values) {
addCriterion("id in", values, "id");
return (Criteria) this;
}
public Criteria andIdNotIn(List<Integer> values) {
addCriterion("id not in", values, "id");
return (Criteria) this;
}
public Criteria andIdBetween(Integer value1, Integer value2) {
addCriterion("id between", value1, value2, "id");
return (Criteria) this;
}
public Criteria andIdNotBetween(Integer value1, Integer value2) {
addCriterion("id not between", value1, value2, "id");
return (Criteria) this;
}
public Criteria andNameIsNull() {
addCriterion("name is null");
return (Criteria) this;
}
public Criteria andNameIsNotNull() {
addCriterion("name is not null");
return (Criteria) this;
}
public Criteria andNameEqualTo(String value) {
addCriterion("name =", value, "name");
return (Criteria) this;
}
public Criteria andNameNotEqualTo(String value) {
addCriterion("name <>", value, "name");
return (Criteria) this;
}
public Criteria andNameGreaterThan(String value) {
addCriterion("name >", value, "name");
return (Criteria) this;
}
public Criteria andNameGreaterThanOrEqualTo(String value) {
addCriterion("name >=", value, "name");
return (Criteria) this;
}
public Criteria andNameLessThan(String value) {
addCriterion("name <", value, "name");
return (Criteria) this;
}
public Criteria andNameLessThanOrEqualTo(String value) {
addCriterion("name <=", value, "name");
return (Criteria) this;
}
public Criteria andNameLike(String value) {
addCriterion("name like", value, "name");
return (Criteria) this;
}
public Criteria andNameNotLike(String value) {
addCriterion("name not like", value, "name");
return (Criteria) this;
}
public Criteria andNameIn(List<String> values) {
addCriterion("name in", values, "name");
return (Criteria) this;
}
public Criteria andNameNotIn(List<String> values) {
addCriterion("name not in", values, "name");
return (Criteria) this;
}
public Criteria andNameBetween(String value1, String value2) {
addCriterion("name between", value1, value2, "name");
return (Criteria) this;
}
public Criteria andNameNotBetween(String value1, String value2) {
addCriterion("name not between", value1, value2, "name");
return (Criteria) this;
}
public Criteria andPriceIsNull() {
addCriterion("price is null");
return (Criteria) this;
}
public Criteria andPriceIsNotNull() {
addCriterion("price is not null");
return (Criteria) this;
}
public Criteria andPriceEqualTo(Float value) {
addCriterion("price =", value, "price");
return (Criteria) this;
}
public Criteria andPriceNotEqualTo(Float value) {
addCriterion("price <>", value, "price");
return (Criteria) this;
}
public Criteria andPriceGreaterThan(Float value) {
addCriterion("price >", value, "price");
return (Criteria) this;
}
public Criteria andPriceGreaterThanOrEqualTo(Float value) {
addCriterion("price >=", value, "price");
return (Criteria) this;
}
public Criteria andPriceLessThan(Float value) {
addCriterion("price <", value, "price");
return (Criteria) this;
}
public Criteria andPriceLessThanOrEqualTo(Float value) {
addCriterion("price <=", value, "price");
return (Criteria) this;
}
public Criteria andPriceIn(List<Float> values) {
addCriterion("price in", values, "price");
return (Criteria) this;
}
public Criteria andPriceNotIn(List<Float> values) {
addCriterion("price not in", values, "price");
return (Criteria) this;
}
public Criteria andPriceBetween(Float value1, Float value2) {
addCriterion("price between", value1, value2, "price");
return (Criteria) this;
}
public Criteria andPriceNotBetween(Float value1, Float value2) {
addCriterion("price not between", value1, value2, "price");
return (Criteria) this;
}
public Criteria andPicIsNull() {
addCriterion("pic is null");
return (Criteria) this;
}
public Criteria andPicIsNotNull() {
addCriterion("pic is not null");
return (Criteria) this;
}
public Criteria andPicEqualTo(String value) {
addCriterion("pic =", value, "pic");
return (Criteria) this;
}
public Criteria andPicNotEqualTo(String value) {
addCriterion("pic <>", value, "pic");
return (Criteria) this;
}
public Criteria andPicGreaterThan(String value) {
addCriterion("pic >", value, "pic");
return (Criteria) this;
}
public Criteria andPicGreaterThanOrEqualTo(String value) {
addCriterion("pic >=", value, "pic");
return (Criteria) this;
}
public Criteria andPicLessThan(String value) {
addCriterion("pic <", value, "pic");
return (Criteria) this;
}
public Criteria andPicLessThanOrEqualTo(String value) {
addCriterion("pic <=", value, "pic");
return (Criteria) this;
}
public Criteria andPicLike(String value) {
addCriterion("pic like", value, "pic");
return (Criteria) this;
}
public Criteria andPicNotLike(String value) {
addCriterion("pic not like", value, "pic");
return (Criteria) this;
}
public Criteria andPicIn(List<String> values) {
addCriterion("pic in", values, "pic");
return (Criteria) this;
}
public Criteria andPicNotIn(List<String> values) {
addCriterion("pic not in", values, "pic");
return (Criteria) this;
}
public Criteria andPicBetween(String value1, String value2) {
addCriterion("pic between", value1, value2, "pic");
return (Criteria) this;
}
public Criteria andPicNotBetween(String value1, String value2) {
addCriterion("pic not between", value1, value2, "pic");
return (Criteria) this;
}
public Criteria andCreatetimeIsNull() {
addCriterion("createtime is null");
return (Criteria) this;
}
public Criteria andCreatetimeIsNotNull() {
addCriterion("createtime is not null");
return (Criteria) this;
}
public Criteria andCreatetimeEqualTo(Date value) {
addCriterion("createtime =", value, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeNotEqualTo(Date value) {
addCriterion("createtime <>", value, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeGreaterThan(Date value) {
addCriterion("createtime >", value, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeGreaterThanOrEqualTo(Date value) {
addCriterion("createtime >=", value, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeLessThan(Date value) {
addCriterion("createtime <", value, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeLessThanOrEqualTo(Date value) {
addCriterion("createtime <=", value, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeIn(List<Date> values) {
addCriterion("createtime in", values, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeNotIn(List<Date> values) {
addCriterion("createtime not in", values, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeBetween(Date value1, Date value2) {
addCriterion("createtime between", value1, value2, "createtime");
return (Criteria) this;
}
public Criteria andCreatetimeNotBetween(Date value1, Date value2) {
addCriterion("createtime not between", value1, value2, "createtime");
return (Criteria) this;
}
}
public static class Criteria extends GeneratedCriteria {
protected Criteria() {
super();
}
}
public static class Criterion {
private String condition;
private Object value;
private Object secondValue;
private boolean noValue;
private boolean singleValue;
private boolean betweenValue;
private boolean listValue;
private String typeHandler;
public String getCondition() {
return condition;
}
public Object getValue() {
return value;
}
public Object getSecondValue() {
return secondValue;
}
public boolean isNoValue() {
return noValue;
}
public boolean isSingleValue() {
return singleValue;
}
public boolean isBetweenValue() {
return betweenValue;
}
public boolean isListValue() {
return listValue;
}
public String getTypeHandler() {
return typeHandler;
}
protected Criterion(String condition) {
super();
this.condition = condition;
this.typeHandler = null;
this.noValue = true;
}
protected Criterion(String condition, Object value, String typeHandler) {
super();
this.condition = condition;
this.value = value;
this.typeHandler = typeHandler;
if (value instanceof List<?>) {
this.listValue = true;
} else {
this.singleValue = true;
}
}
protected Criterion(String condition, Object value) {
this(condition, value, null);
}
protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
super();
this.condition = condition;
this.value = value;
this.secondValue = secondValue;
this.typeHandler = typeHandler;
this.betweenValue = true;
}
protected Criterion(String condition, Object value, Object secondValue) {
this(condition, value, secondValue, null);
}
}
}User.java
package cn.ctgu.springmvc.pojo;
import java.util.Date;
public class User {
private Integer id;
private String username;
private Date birthday;
private String sex;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username == null ? null : username.trim();
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex == null ? null : sex.trim();
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address == null ? null : address.trim();
}
}UserExample.java
package cn.ctgu.springmvc.pojo;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
public class UserExample {
protected String orderByClause;
protected boolean distinct;
protected List<Criteria> oredCriteria;
public UserExample() {
oredCriteria = new ArrayList<Criteria>();
}
public void setOrderByClause(String orderByClause) {
this.orderByClause = orderByClause;
}
public String getOrderByClause() {
return orderByClause;
}
public void setDistinct(boolean distinct) {
this.distinct = distinct;
}
public boolean isDistinct() {
return distinct;
}
public List<Criteria> getOredCriteria() {
return oredCriteria;
}
public void or(Criteria criteria) {
oredCriteria.add(criteria);
}
public Criteria or() {
Criteria criteria = createCriteriaInternal();
oredCriteria.add(criteria);
return criteria;
}
public Criteria createCriteria() {
Criteria criteria = createCriteriaInternal();
if (oredCriteria.size() == 0) {
oredCriteria.add(criteria);
}
return criteria;
}
protected Criteria createCriteriaInternal() {
Criteria criteria = new Criteria();
return criteria;
}
public void clear() {
oredCriteria.clear();
orderByClause = null;
distinct = false;
}
protected abstract static class GeneratedCriteria {
protected List<Criterion> criteria;
protected GeneratedCriteria() {
super();
criteria = new ArrayList<Criterion>();
}
public boolean isValid() {
return criteria.size() > 0;
}
public List<Criterion> getAllCriteria() {
return criteria;
}
public List<Criterion> getCriteria() {
return criteria;
}
protected void addCriterion(String condition) {
if (condition == null) {
throw new RuntimeException("Value for condition cannot be null");
}
criteria.add(new Criterion(condition));
}
protected void addCriterion(String condition, Object value, String property) {
if (value == null) {
throw new RuntimeException("Value for " + property + " cannot be null");
}
criteria.add(new Criterion(condition, value));
}
protected void addCriterion(String condition, Object value1, Object value2, String property) {
if (value1 == null || value2 == null) {
throw new RuntimeException("Between values for " + property + " cannot be null");
}
criteria.add(new Criterion(condition, value1, value2));
}
protected void addCriterionForJDBCDate(String condition, Date value, String property) {
if (value == null) {
throw new RuntimeException("Value for " + property + " cannot be null");
}
addCriterion(condition, new java.sql.Date(value.getTime()), property);
}
protected void addCriterionForJDBCDate(String condition, List<Date> values, String property) {
if (values == null || values.size() == 0) {
throw new RuntimeException("Value list for " + property + " cannot be null or empty");
}
List<java.sql.Date> dateList = new ArrayList<java.sql.Date>();
Iterator<Date> iter = values.iterator();
while (iter.hasNext()) {
dateList.add(new java.sql.Date(iter.next().getTime()));
}
addCriterion(condition, dateList, property);
}
protected void addCriterionForJDBCDate(String condition, Date value1, Date value2, String property) {
if (value1 == null || value2 == null) {
throw new RuntimeException("Between values for " + property + " cannot be null");
}
addCriterion(condition, new java.sql.Date(value1.getTime()), new java.sql.Date(value2.getTime()), property);
}
public Criteria andIdIsNull() {
addCriterion("id is null");
return (Criteria) this;
}
public Criteria andIdIsNotNull() {
addCriterion("id is not null");
return (Criteria) this;
}
public Criteria andIdEqualTo(Integer value) {
addCriterion("id =", value, "id");
return (Criteria) this;
}
public Criteria andIdNotEqualTo(Integer value) {
addCriterion("id <>", value, "id");
return (Criteria) this;
}
public Criteria andIdGreaterThan(Integer value) {
addCriterion("id >", value, "id");
return (Criteria) this;
}
public Criteria andIdGreaterThanOrEqualTo(Integer value) {
addCriterion("id >=", value, "id");
return (Criteria) this;
}
public Criteria andIdLessThan(Integer value) {
addCriterion("id <", value, "id");
return (Criteria) this;
}
public Criteria andIdLessThanOrEqualTo(Integer value) {
addCriterion("id <=", value, "id");
return (Criteria) this;
}
public Criteria andIdIn(List<Integer> values) {
addCriterion("id in", values, "id");
return (Criteria) this;
}
public Criteria andIdNotIn(List<Integer> values) {
addCriterion("id not in", values, "id");
return (Criteria) this;
}
public Criteria andIdBetween(Integer value1, Integer value2) {
addCriterion("id between", value1, value2, "id");
return (Criteria) this;
}
public Criteria andIdNotBetween(Integer value1, Integer value2) {
addCriterion("id not between", value1, value2, "id");
return (Criteria) this;
}
public Criteria andUsernameIsNull() {
addCriterion("username is null");
return (Criteria) this;
}
public Criteria andUsernameIsNotNull() {
addCriterion("username is not null");
return (Criteria) this;
}
public Criteria andUsernameEqualTo(String value) {
addCriterion("username =", value, "username");
return (Criteria) this;
}
public Criteria andUsernameNotEqualTo(String value) {
addCriterion("username <>", value, "username");
return (Criteria) this;
}
public Criteria andUsernameGreaterThan(String value) {
addCriterion("username >", value, "username");
return (Criteria) this;
}
public Criteria andUsernameGreaterThanOrEqualTo(String value) {
addCriterion("username >=", value, "username");
return (Criteria) this;
}
public Criteria andUsernameLessThan(String value) {
addCriterion("username <", value, "username");
return (Criteria) this;
}
public Criteria andUsernameLessThanOrEqualTo(String value) {
addCriterion("username <=", value, "username");
return (Criteria) this;
}
public Criteria andUsernameLike(String value) {
addCriterion("username like", value, "username");
return (Criteria) this;
}
public Criteria andUsernameNotLike(String value) {
addCriterion("username not like", value, "username");
return (Criteria) this;
}
public Criteria andUsernameIn(List<String> values) {
addCriterion("username in", values, "username");
return (Criteria) this;
}
public Criteria andUsernameNotIn(List<String> values) {
addCriterion("username not in", values, "username");
return (Criteria) this;
}
public Criteria andUsernameBetween(String value1, String value2) {
addCriterion("username between", value1, value2, "username");
return (Criteria) this;
}
public Criteria andUsernameNotBetween(String value1, String value2) {
addCriterion("username not between", value1, value2, "username");
return (Criteria) this;
}
public Criteria andBirthdayIsNull() {
addCriterion("birthday is null");
return (Criteria) this;
}
public Criteria andBirthdayIsNotNull() {
addCriterion("birthday is not null");
return (Criteria) this;
}
public Criteria andBirthdayEqualTo(Date value) {
addCriterionForJDBCDate("birthday =", value, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayNotEqualTo(Date value) {
addCriterionForJDBCDate("birthday <>", value, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayGreaterThan(Date value) {
addCriterionForJDBCDate("birthday >", value, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayGreaterThanOrEqualTo(Date value) {
addCriterionForJDBCDate("birthday >=", value, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayLessThan(Date value) {
addCriterionForJDBCDate("birthday <", value, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayLessThanOrEqualTo(Date value) {
addCriterionForJDBCDate("birthday <=", value, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayIn(List<Date> values) {
addCriterionForJDBCDate("birthday in", values, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayNotIn(List<Date> values) {
addCriterionForJDBCDate("birthday not in", values, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayBetween(Date value1, Date value2) {
addCriterionForJDBCDate("birthday between", value1, value2, "birthday");
return (Criteria) this;
}
public Criteria andBirthdayNotBetween(Date value1, Date value2) {
addCriterionForJDBCDate("birthday not between", value1, value2, "birthday");
return (Criteria) this;
}
public Criteria andSexIsNull() {
addCriterion("sex is null");
return (Criteria) this;
}
public Criteria andSexIsNotNull() {
addCriterion("sex is not null");
return (Criteria) this;
}
public Criteria andSexEqualTo(String value) {
addCriterion("sex =", value, "sex");
return (Criteria) this;
}
public Criteria andSexNotEqualTo(String value) {
addCriterion("sex <>", value, "sex");
return (Criteria) this;
}
public Criteria andSexGreaterThan(String value) {
addCriterion("sex >", value, "sex");
return (Criteria) this;
}
public Criteria andSexGreaterThanOrEqualTo(String value) {
addCriterion("sex >=", value, "sex");
return (Criteria) this;
}
public Criteria andSexLessThan(String value) {
addCriterion("sex <", value, "sex");
return (Criteria) this;
}
public Criteria andSexLessThanOrEqualTo(String value) {
addCriterion("sex <=", value, "sex");
return (Criteria) this;
}
public Criteria andSexLike(String value) {
addCriterion("sex like", value, "sex");
return (Criteria) this;
}
public Criteria andSexNotLike(String value) {
addCriterion("sex not like", value, "sex");
return (Criteria) this;
}
public Criteria andSexIn(List<String> values) {
addCriterion("sex in", values, "sex");
return (Criteria) this;
}
public Criteria andSexNotIn(List<String> values) {
addCriterion("sex not in", values, "sex");
return (Criteria) this;
}
public Criteria andSexBetween(String value1, String value2) {
addCriterion("sex between", value1, value2, "sex");
return (Criteria) this;
}
public Criteria andSexNotBetween(String value1, String value2) {
addCriterion("sex not between", value1, value2, "sex");
return (Criteria) this;
}
public Criteria andAddressIsNull() {
addCriterion("address is null");
return (Criteria) this;
}
public Criteria andAddressIsNotNull() {
addCriterion("address is not null");
return (Criteria) this;
}
public Criteria andAddressEqualTo(String value) {
addCriterion("address =", value, "address");
return (Criteria) this;
}
public Criteria andAddressNotEqualTo(String value) {
addCriterion("address <>", value, "address");
return (Criteria) this;
}
public Criteria andAddressGreaterThan(String value) {
addCriterion("address >", value, "address");
return (Criteria) this;
}
public Criteria andAddressGreaterThanOrEqualTo(String value) {
addCriterion("address >=", value, "address");
return (Criteria) this;
}
public Criteria andAddressLessThan(String value) {
addCriterion("address <", value, "address");
return (Criteria) this;
}
public Criteria andAddressLessThanOrEqualTo(String value) {
addCriterion("address <=", value, "address");
return (Criteria) this;
}
public Criteria andAddressLike(String value) {
addCriterion("address like", value, "address");
return (Criteria) this;
}
public Criteria andAddressNotLike(String value) {
addCriterion("address not like", value, "address");
return (Criteria) this;
}
public Criteria andAddressIn(List<String> values) {
addCriterion("address in", values, "address");
return (Criteria) this;
}
public Criteria andAddressNotIn(List<String> values) {
addCriterion("address not in", values, "address");
return (Criteria) this;
}
public Criteria andAddressBetween(String value1, String value2) {
addCriterion("address between", value1, value2, "address");
return (Criteria) this;
}
public Criteria andAddressNotBetween(String value1, String value2) {
addCriterion("address not between", value1, value2, "address");
return (Criteria) this;
}
}
public static class Criteria extends GeneratedCriteria {
protected Criteria() {
super();
}
}
public static class Criterion {
private String condition;
private Object value;
private Object secondValue;
private boolean noValue;
private boolean singleValue;
private boolean betweenValue;
private boolean listValue;
private String typeHandler;
public String getCondition() {
return condition;
}
public Object getValue() {
return value;
}
public Object getSecondValue() {
return secondValue;
}
public boolean isNoValue() {
return noValue;
}
public boolean isSingleValue() {
return singleValue;
}
public boolean isBetweenValue() {
return betweenValue;
}
public boolean isListValue() {
return listValue;
}
public String getTypeHandler() {
return typeHandler;
}
protected Criterion(String condition) {
super();
this.condition = condition;
this.typeHandler = null;
this.noValue = true;
}
protected Criterion(String condition, Object value, String typeHandler) {
super();
this.condition = condition;
this.value = value;
this.typeHandler = typeHandler;
if (value instanceof List<?>) {
this.listValue = true;
} else {
this.singleValue = true;
}
}
protected Criterion(String condition, Object value) {
this(condition, value, null);
}
protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
super();
this.condition = condition;
this.value = value;
this.secondValue = secondValue;
this.typeHandler = typeHandler;
this.betweenValue = true;
}
protected Criterion(String condition, Object value, Object secondValue) {
this(condition, value, secondValue, null);
}
}
}cn.ctgu.springmvc.dao
ItemsMapper.java
package cn.ctgu.springmvc.dao;
import cn.ctgu.springmvc.pojo.Items;
import cn.ctgu.springmvc.pojo.ItemsExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface ItemsMapper {
int countByExample(ItemsExample example);
int deleteByExample(ItemsExample example);
int deleteByPrimaryKey(Integer id);
int insert(Items record);
int insertSelective(Items record);
List<Items> selectByExampleWithBLOBs(ItemsExample example);
List<Items> selectByExample(ItemsExample example);
Items selectByPrimaryKey(Integer id);
int updateByExampleSelective(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByExampleWithBLOBs(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByExample(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByPrimaryKeySelective(Items record);
int updateByPrimaryKeyWithBLOBs(Items record);
int updateByPrimaryKey(Items record);
}ItemsMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="cn.ctgu.springmvc.dao.ItemsMapper" >
<resultMap id="BaseResultMap" type="cn.ctgu.springmvc.pojo.Items" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="price" property="price" jdbcType="REAL" />
<result column="pic" property="pic" jdbcType="VARCHAR" />
<result column="createtime" property="createtime" jdbcType="TIMESTAMP" />
</resultMap>
<resultMap id="ResultMapWithBLOBs" type="cn.ctgu.springmvc.pojo.Items" extends="BaseResultMap" >
<result column="detail" property="detail" jdbcType="LONGVARCHAR" />
</resultMap>
<sql id="Example_Where_Clause" >
<where >
<foreach collection="oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause" >
<where >
<foreach collection="example.oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List" >
id, name, price, pic, createtime
</sql>
<sql id="Blob_Column_List" >
detail
</sql>
<select id="selectByExampleWithBLOBs" resultMap="ResultMapWithBLOBs" parameterType="cn.ctgu.springmvc.pojo.ItemsExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
,
<include refid="Blob_Column_List" />
from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByExample" resultMap="BaseResultMap" parameterType="cn.ctgu.springmvc.pojo.ItemsExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" resultMap="ResultMapWithBLOBs" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
,
<include refid="Blob_Column_List" />
from items
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from items
where id = #{id,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="cn.ctgu.springmvc.pojo.ItemsExample" >
delete from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="cn.ctgu.springmvc.pojo.Items" >
insert into items (id, name, price,
pic, createtime, detail
)
values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{price,jdbcType=REAL},
#{pic,jdbcType=VARCHAR}, #{createtime,jdbcType=TIMESTAMP}, #{detail,jdbcType=LONGVARCHAR}
)
</insert>
<insert id="insertSelective" parameterType="cn.ctgu.springmvc.pojo.Items" >
insert into items
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="name != null" >
name,
</if>
<if test="price != null" >
price,
</if>
<if test="pic != null" >
pic,
</if>
<if test="createtime != null" >
createtime,
</if>
<if test="detail != null" >
detail,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="name != null" >
#{name,jdbcType=VARCHAR},
</if>
<if test="price != null" >
#{price,jdbcType=REAL},
</if>
<if test="pic != null" >
#{pic,jdbcType=VARCHAR},
</if>
<if test="createtime != null" >
#{createtime,jdbcType=TIMESTAMP},
</if>
<if test="detail != null" >
#{detail,jdbcType=LONGVARCHAR},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="cn.ctgu.springmvc.pojo.ItemsExample" resultType="java.lang.Integer" >
select count(*) from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map" >
update items
<set >
<if test="record.id != null" >
id = #{record.id,jdbcType=INTEGER},
</if>
<if test="record.name != null" >
name = #{record.name,jdbcType=VARCHAR},
</if>
<if test="record.price != null" >
price = #{record.price,jdbcType=REAL},
</if>
<if test="record.pic != null" >
pic = #{record.pic,jdbcType=VARCHAR},
</if>
<if test="record.createtime != null" >
createtime = #{record.createtime,jdbcType=TIMESTAMP},
</if>
<if test="record.detail != null" >
detail = #{record.detail,jdbcType=LONGVARCHAR},
</if>
</set>
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExampleWithBLOBs" parameterType="map" >
update items
set id = #{record.id,jdbcType=INTEGER},
name = #{record.name,jdbcType=VARCHAR},
price = #{record.price,jdbcType=REAL},
pic = #{record.pic,jdbcType=VARCHAR},
createtime = #{record.createtime,jdbcType=TIMESTAMP},
detail = #{record.detail,jdbcType=LONGVARCHAR}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map" >
update items
set id = #{record.id,jdbcType=INTEGER},
name = #{record.name,jdbcType=VARCHAR},
price = #{record.price,jdbcType=REAL},
pic = #{record.pic,jdbcType=VARCHAR},
createtime = #{record.createtime,jdbcType=TIMESTAMP}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="cn.ctgu.springmvc.pojo.Items" >
update items
<set >
<if test="name != null" >
name = #{name,jdbcType=VARCHAR},
</if>
<if test="price != null" >
price = #{price,jdbcType=REAL},
</if>
<if test="pic != null" >
pic = #{pic,jdbcType=VARCHAR},
</if>
<if test="createtime != null" >
createtime = #{createtime,jdbcType=TIMESTAMP},
</if>
<if test="detail != null" >
detail = #{detail,jdbcType=LONGVARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKeyWithBLOBs" parameterType="cn.ctgu.springmvc.pojo.Items" >
update items
set name = #{name,jdbcType=VARCHAR},
price = #{price,jdbcType=REAL},
pic = #{pic,jdbcType=VARCHAR},
createtime = #{createtime,jdbcType=TIMESTAMP},
detail = #{detail,jdbcType=LONGVARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="cn.ctgu.springmvc.pojo.Items" >
update items
set name = #{name,jdbcType=VARCHAR},
price = #{price,jdbcType=REAL},
pic = #{pic,jdbcType=VARCHAR},
createtime = #{createtime,jdbcType=TIMESTAMP}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>UserMapper.java
package cn.ctgu.springmvc.dao;
import cn.ctgu.springmvc.pojo.User;
import cn.ctgu.springmvc.pojo.UserExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface UserMapper {
int countByExample(UserExample example);
int deleteByExample(UserExample example);
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
List<User> selectByExample(UserExample example);
User selectByPrimaryKey(Integer id);
int updateByExampleSelective(@Param("record") User record, @Param("example") UserExample example);
int updateByExample(@Param("record") User record, @Param("example") UserExample example);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
}UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="cn.ctgu.springmvc.dao.UserMapper" >
<resultMap id="BaseResultMap" type="cn.ctgu.springmvc.pojo.User" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="username" property="username" jdbcType="VARCHAR" />
<result column="birthday" property="birthday" jdbcType="DATE" />
<result column="sex" property="sex" jdbcType="CHAR" />
<result column="address" property="address" jdbcType="VARCHAR" />
</resultMap>
<sql id="Example_Where_Clause" >
<where >
<foreach collection="oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause" >
<where >
<foreach collection="example.oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List" >
id, username, birthday, sex, address
</sql>
<select id="selectByExample" resultMap="BaseResultMap" parameterType="cn.ctgu.springmvc.pojo.UserExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from user
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from user
where id = #{id,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="cn.ctgu.springmvc.pojo.UserExample" >
delete from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="cn.ctgu.springmvc.pojo.User" >
insert into user (id, username, birthday,
sex, address)
values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{birthday,jdbcType=DATE},
#{sex,jdbcType=CHAR}, #{address,jdbcType=VARCHAR})
</insert>
<insert id="insertSelective" parameterType="cn.ctgu.springmvc.pojo.User" >
insert into user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="username != null" >
username,
</if>
<if test="birthday != null" >
birthday,
</if>
<if test="sex != null" >
sex,
</if>
<if test="address != null" >
address,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="username != null" >
#{username,jdbcType=VARCHAR},
</if>
<if test="birthday != null" >
#{birthday,jdbcType=DATE},
</if>
<if test="sex != null" >
#{sex,jdbcType=CHAR},
</if>
<if test="address != null" >
#{address,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="cn.ctgu.springmvc.pojo.UserExample" resultType="java.lang.Integer" >
select count(*) from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map" >
update user
<set >
<if test="record.id != null" >
id = #{record.id,jdbcType=INTEGER},
</if>
<if test="record.username != null" >
username = #{record.username,jdbcType=VARCHAR},
</if>
<if test="record.birthday != null" >
birthday = #{record.birthday,jdbcType=DATE},
</if>
<if test="record.sex != null" >
sex = #{record.sex,jdbcType=CHAR},
</if>
<if test="record.address != null" >
address = #{record.address,jdbcType=VARCHAR},
</if>
</set>
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map" >
update user
set id = #{record.id,jdbcType=INTEGER},
username = #{record.username,jdbcType=VARCHAR},
birthday = #{record.birthday,jdbcType=DATE},
sex = #{record.sex,jdbcType=CHAR},
address = #{record.address,jdbcType=VARCHAR}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="cn.ctgu.springmvc.pojo.User" >
update user
<set >
<if test="username != null" >
username = #{username,jdbcType=VARCHAR},
</if>
<if test="birthday != null" >
birthday = #{birthday,jdbcType=DATE},
</if>
<if test="sex != null" >
sex = #{sex,jdbcType=CHAR},
</if>
<if test="address != null" >
address = #{address,jdbcType=VARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="cn.ctgu.springmvc.pojo.User" >
update user
set username = #{username,jdbcType=VARCHAR},
birthday = #{birthday,jdbcType=DATE},
sex = #{sex,jdbcType=CHAR},
address = #{address,jdbcType=VARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>ItemService接口
package cn.ctgu.springmvc.service;
import java.util.List;
import cn.ctgu.springmvc.pojo.Items;
public interface ItemService {
public List<Items> selectItemsList();
public Items selectItemsById(Integer id);
public void updateItemById(Items items);
}ItemServiceImpl.java
package cn.ctgu.springmvc.service;
import java.util.Date;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import cn.ctgu.springmvc.dao.ItemsMapper;
import cn.ctgu.springmvc.pojo.Items;
/*
* 查询商品信息
*
* */
@Service
public class ItemServiceImpl implements ItemService {
@Autowired
private ItemsMapper itemsMapper;
@Override
//查询商品列表
public List<Items> selectItemsList() {
return itemsMapper.selectByExampleWithBLOBs(null);
}
//根据id查询
public Items selectItemsById(Integer id) {
return itemsMapper.selectByPrimaryKey(id);
}
//修改信息
public void updateItemById(Items items) {
items.setCreatetime(new Date());
itemsMapper.updateByPrimaryKeyWithBLOBs(items);
}
}ItemController.java
package cn.ctgu.springmvc.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import cn.ctgu.springmvc.pojo.Items;
import cn.ctgu.springmvc.pojo.QueryVo;
import cn.ctgu.springmvc.service.ItemService;
/*
* 商品管理
*
* */
@Controller
public class ItemController {
@Autowired
private ItemService itemService;
//入门程序 包类+类包+方法名
@RequestMapping(value="/item/itemlist.action")//下面是这个action的映射，也就是它的实现,名称路径得与表单中的对应起来
public ModelAndView itemList() {
//从mysql中查询
List<Items>list=itemService.selectItemsList();
ModelAndView mav=new ModelAndView();
//添加数据
mav.addObject("itemList",list);
mav.setViewName("itemList");
// mav.setViewName("/jsp/itemList.jsp");//由于在springmvc中配置了视图解释器，所以这里可以简写
return mav;
}
}测试
访问：http://127.0.0.1:8080/springmvc-mybatis1/itemList.action
效果如下图：
5.3.2 参数绑定——默认支持的参数类型
需求：打开商品编辑页面，展示商品信息。
需求分析：
编辑商品信息，首先要显示商品详情
需要根据商品id查询商品信息，然后展示到页面。
请求的url：/itemEdit.action
参数：id（商品id）
响应结果：商品编辑页面，展示商品详细信息。
接口和实现类以及pojo、dao、jsp页面、配置文件如上。
ItemController
页面点击修改按钮，发起请求
http://127.0.0.1:8080/springmvc-mybatis1/itemEdit.action?id=1需要从请求的参数中把请求的id取出来。
Id包含在Request对象中。可以从Request对象中取id。
想获得Request对象只需要在Controller方法的形参中添加一个参数即可。Springmvc框架会自动把Request对象传递给方法。
ItemController.java
package cn.ctgu.springmvc.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import cn.ctgu.springmvc.pojo.Items;
import cn.ctgu.springmvc.pojo.QueryVo;
import cn.ctgu.springmvc.service.ItemService;
/*
* 商品管理
*
* */
@Controller
public class ItemController {
@Autowired
private ItemService itemService;
/*//去修改页面（比如jsp表单中的）入参id，绑定id,方法一
@RequestMapping(value="/itemEdit.action")
public ModelAndView toEdit(HttpServletRequest request,
HttpServletResponse response,HttpSession session,Model model) {
//Servlet时代的开发
String id=request.getParameter("id");
//查询一个商品
Items items=itemService.selectItemsById(Integer.parseInt(id));
ModelAndView mav=new ModelAndView();
//数据
mav.addObject("item",items);
mav.setViewName("editItem");
return mav;
}*/
//绑定id,方法二
@RequestMapping(value="/itemEdit.action")
public ModelAndView toEdit(Integer id,HttpServletRequest request,
HttpServletResponse response,HttpSession session,Model model) {
//当绑定的参数和页面中的参数名称不相同时则需要先将其绑定到我们传入的参数param,当我们使用@RequestParam
//时要求页面中的那个param不能为空，当设置required=false时,则页面中的参数id可以为空，为空的话，我们就得给它赋个默认值才能使param不报错
//所以推荐param与页面中的参数名称保持一致
/* public ModelAndView toEdit(@RequestParam(value="id",required=false,default="1")Integer param,HttpServletRequest request,
HttpServletResponse response,HttpSession session,Model model)*/
//查询一个商品
Items items=itemService.selectItemsById(id);
ModelAndView mav=new ModelAndView();
//数据
mav.addObject("item",items);
mav.setViewName("editItem");
return mav;
}
}默认支持的参数类型
处理器形参中添加如下类型的参数处理适配器会默认识别并进行赋值。
HttpServletRequest,通过request对象获取请求信息HttpServletResponse,通过response处理响应信息
HttpSession,通过session对象得到session中存放的对象
Model/ModelMap
Model
除了ModelAndView以外，还可以使用Model来向页面传递数据，Model是一个接口，在参数里直接声明model即可。
如果使用Model则可以不使用ModelAndView对象，Model对象可以向页面传递数据，View对象则可以使用String返回值替代。
不管是Model还是ModelAndView，其本质都是使用Request对象向jsp传递数据。代码如下：
/**
* 根据id查询商品,使用Model
*
* @param request
* @param model
* @return
*/
@RequestMapping("/itemEdit")
public String queryItemById(HttpServletRequest request, Model model) {
// 从request中获取请求参数
String strId = request.getParameter("id");
Integer id = Integer.valueOf(strId);
// 根据id查询商品数据
Item item = this.itemService.queryItemById(id);
// 把结果传递给页面
// ModelAndView modelAndView = new ModelAndView();
// 把商品数据放在模型中
// modelAndView.addObject("item", item);
// 设置逻辑视图
// modelAndView.setViewName("itemEdit");
// 把商品数据放在模型中
model.addAttribute("item", item);
return "itemEdit";
}ModelMap是Model接口的实现类，也可以通过ModelMap向页面传递数据
使用Model和ModelMap的效果一样，如果直接使用Model，springmvc会实例化ModelMap。
代码实现：
/**
* 根据id查询商品,使用ModelMap
*
* @param request
* @param model
* @return
*/
@RequestMapping("/itemEdit")
public String queryItemById(HttpServletRequest request, ModelMap model) {
// 从request中获取请求参数
String strId = request.getParameter("id");
Integer id = Integer.valueOf(strId);
// 根据id查询商品数据
Item item = this.itemService.queryItemById(id);
// 把结果传递给页面
// ModelAndView modelAndView = new ModelAndView();
// 把商品数据放在模型中
// modelAndView.addObject("item", item);
// 设置逻辑视图
// modelAndView.setViewName("itemEdit");
// 把商品数据放在模型中
model.addAttribute("item", item);
return "itemEdit";
}绑定简单类型
当请求的参数名称和处理器形参名称一致时会将请求参数与形参进行绑定。这样，从Request取参数的方法就可以进一步简化。（上面例子有展示）
/**
* 根据id查询商品,绑定简单数据类型
*
* @param id
* @param model
* @return
*/
@RequestMapping("/itemEdit")
public String queryItemById(int id, ModelMap model) {
// 根据id查询商品数据
Item item = this.itemService.queryItemById(id);
// 把商品数据放在模型中
model.addAttribute("item", item);
return "itemEdit";支持的数据类型
参数类型推荐使用包装数据类型，因为基础数据类型不可以为null
整形：Integer、int
字符串：String
单精度：Float、float
双精度：Double、double
布尔型：Boolean、boolean
说明：对于布尔类型的参数，请求的参数值为true或false。或者1或0
请求url：http://localhost:8080/xxx.action?id=2&status=false
处理器方法：
public String editItem(Model model,Integer id,Boolean status)
@RequestParam
使用@RequestParam常用于处理简单类型的绑定。
value：参数名字，即入参的请求参数名字，如value=“itemId”表示请求的参数 区中的名字为itemId的参数的值将传入
required：是否必须，默认是true，表示请求中一定要有相应的参数，否则将报错
TTP Status 400 - Required Integer parameter ‘XXXX’ is not present
defaultValue：默认值，表示如果请求中没有同名参数时的默认值
5.3.3 使用pojo接收表单数据
如果提交的参数很多，或者提交的表单中的内容很多的时候,可以使用简单类型接受数据,也可以使用pojo接收数据。
要求：pojo对象中的属性名和表单中input的name属性一致。
页面定义如下图：
Pojo(逆向工程生成)如下图：
请求的参数名称和pojo的属性名称一致，会自动将请求参数赋值给pojo的属性。
ItemController.java
package cn.ctgu.springmvc.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import cn.ctgu.springmvc.pojo.Items;
import cn.ctgu.springmvc.pojo.QueryVo;
import cn.ctgu.springmvc.service.ItemService;
/*
* 商品管理
*
* */
@Controller
public class ItemController {
@Autowired
private ItemService itemService;
//提交修改页面
@RequestMapping(value="/updateitem.action")
public ModelAndView updateitem(Items items) {//注意：Items里面的属性要与表单页面中的属性名称相对应
//修改
itemService.updateItemById(items);
ModelAndView mav=new ModelAndView();
mav.setViewName("success");
return mav;
}
//提交修改页面,采用包装类实现
@RequestMapping(value="/updateitem.action")
public ModelAndView updateitemQueryVo(QueryVo vo) {//注意：由于QueryVo里面的属性要与表单页面中的属性名称相对应，但QueryVo是封装了items的，所以要对表单页面进行相应的修改
//修改
itemService.updateItemById(vo.getItems());
ModelAndView mav=new ModelAndView();
mav.setViewName("success");
return mav;
}
}注意：
提交的表单中不要有日期类型的数据，否则会报400错误。如果想提交日期类型的数据需要用到后面的自定义参数绑定的内容。
5.3.4 解决post乱码问题
提交发现，保存成功，但是保存的是乱码
在web.xml中加入：
<!-- 解决post乱码问题 -->
<filter>
<filter-name>encoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!-- 设置编码参是UTF8 -->
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>以上可以解决post请求乱码问题。
对于get请求中文参数出现乱码解决方法有两个：
修改tomcat配置文件添加编码与工程编码一致，如下：
<Connector URIEncoding="utf-8" connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>另外一种方法对参数进行重新编码：
String userName=new
String(request.getParamter("userName").getBytes("ISO8859-1"),"utf-8")ISO8859-1是tomcat默认编码，需要将tomcat编码后的内容按utf-8编码
5.3.5 自定义参数绑定
需求：在商品修改页面可以修改商品的生产日期，并且根据业务需求自定义日期格式。
需求分析：由于日期数据有很多种格式，springmvc没办法把字符串转换成日期类型。所以需要自定义参数绑定。
前端控制器接收到请求后，找到注解形式的处理器适配器，对RequestMapping标记的方法进行适配，并对方法中的形参进行参数绑定。可以在springmvc处理器适配器上自定义转换器Converter进行参数绑定。
一般使用<mvc:annotation-driven/>注解驱动加载处理器适配器，可以在此标签上进行配置。
修改jsp页面
如下图修改itemEdit.jsp页面，显示时间
自定义Converter
package cn.ctgu.springmvc.conversion;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.core.convert.converter.Converter;
/*
* 转换日期类型的数据
*
* S：页面传递过来的类型
* T:转换后的类型
*
* */
public class DateConveter implements Converter<String,Date>{
@Override
public Date convert(String source) {
try {
if(null!=source) {
//要将2016:11-05 11_43-50日期格式转换成标准格式
DateFormat df=new SimpleDateFormat("yyyy:MM-dd HH_mm-ss");
return df.parse(source);
}
}catch(Exception e) {
}
return null;
}
}配置Converter有两种
方式一
<!-- 配置注解驱动 -->
<!-- 如果配置此标签,可以不用配置... -->
<mvc:annotation-driven conversion-service="conversionService" />
<!-- 转换器配置 -->
<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
<property name="converters">
<set>
<bean class="cn.itcast.springmvc.converter.DateConverter" />
</set>
</property>
</bean>方式二
<!--注解适配器 -->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="webBindingInitializer" ref="customBinder"></property>
</bean>
<!-- 自定义webBinder -->
<bean id="customBinder" class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
<property name="conversionService" ref="conversionService" />
</bean>
<!-- 转换器配置 -->
<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
<property name="converters">
<set>
<bean class="cn.itcast.springmvc.convert.DateConverter" />
</set>
</property>
</bean>注意：此方法需要独立配置处理器映射器、适配器，
不再使用<mvc:annotation-driven/>
6、springmvc和Struts2的不同
1、springmvc的入口是一个servlet即前端控制器，而struts2入口是一个filter过滤器。
2、springmvc是基于方法开发(一个url对应一个方法)，请求参数传递到方法的形参，可以设计为单例或多例(建议单例)，struts2是基于类开发，传递参数是通过类的属性，只能设计为多例。
3、Struts采用值栈存储请求和响应的数据，通过OGNL存取数据， springmvc通过参数解析器是将request请求内容解析，并给方法形参赋值，将数据和视图封装成ModelAndView对象，最后又将ModelAndView中的模型数据通过request域传输到页面。Jsp视图解析器默认使用jstl。