session数据访问
------------------
1.java
@RequestMapping("/toLogin")
public String doLogin() {
return "login";
}
@RequestMapping("/doLogin")
public String doLogin(User u ,HttpSession s){
//将数据存放到session范围。
s.setAttribute("user",u);
return "index" ;
}
2.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="true" %>
<html>
<head>
<title>login.jsp</title>
</head>
<body>
<c:out value="${sessionScope.user.name}"/>
<c:if test="${sessionScope.user != null}">
欢迎 <c:out value="${sessionScope.user.name}"/>
</c:if>
<c:if test="${sessionScope.user == null}">
您尚未登录,请登录!!
</c:if>
<c:out value="${sessionScope.user.name}"/>
<form action='<c:url value="/doLogin" />' method="post">
UserName : <input type="text" name="name"><br>
Password : <input type="password" name="password"><br>
<input type="submit"/>
</form>
</body>
</html>
整合SSM(springmvc + spring + mybatis)
----------------------------------------
1.创建模块
ssm(javaee)
2.添加maven支持
3.添加依赖。
mysql驱动
c3p0数据源
mybatis
spring(tx | aop | context))
mybatis-spring
spring mvc
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.it18zhang</groupId>
<artifactId>ssm</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.17</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>4.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.10</version>
</dependency>
</dependencies>
</project>
4.创建包
com.it18zhang.ssm.dao.impl
com.it18zhang.ssm.service.impl
com.it18zhang.ssm.domain
com.it18zhang.ssm.util
com.it18zhang.ssm.web.controller
5.创建基本类库
com.it18zhang.ssm.domain.User
com.it18zhang.ssm.domain.Order
com.it18zhang.ssm.domain.Item
...
6.复制beans.xml + mybatis-cconfig.xml+UserMapper.xml + OrderMapper.xml + ItemMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd" default-autowire="byType">
<!-- 配置事务特征 -->
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED" isolation="DEFAULT"/>
</tx:attributes>
</tx:advice>
<!-- 配置事务切面 -->
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* *..*Service.*(..))" />
</aop:config>
<!-- 扫描包 -->
<context:component-scan base-package="com.it18zhang.ssm.dao,com.it18zhang.ssm.service" />
<!-- 数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mybatis?user=root&password=root"/>
<property name="user" value="root"/>
<property name="password" value="root"/>
<property name="maxPoolSize" value="10"/>
<property name="minPoolSize" value="2"/>
<property name="initialPoolSize" value="3"/>
<property name="acquireIncrement" value="2"/>
</bean>
<!-- mybatis整合spring的核心类。 -->
<bean id="sf" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 指定数据源 -->
<property name="dataSource" ref="dataSource" />
<!-- 指定mybatis配置文件 -->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!-- 数据源事务管理器 -->
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>
...
7.创建UserController.java
package com.it18zhang.ssm.web.controller;
import com.it18zhang.ssm.domain.User;
import com.it18zhang.ssm.service.UserService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.annotation.Resource;
import java.util.List;
/**
*
*/
@Controller
public class UserController {
@Resource(name="userService")
private UserService us ;
/**
* 查看全部user
*/
@RequestMapping("/user/findall")
public String findAll(Model m ){
List<User> list = us.selectAll();
m.addAttribute("allUsers",list);
return "user/userList" ;
}
}
8.编写web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!-- 指定spring的配置文件beans.xml -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:beans.xml</param-value>
</context-param>
<!-- 确保web服务器启动时，完成spring的容器初始化 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 配置分发器Servlet -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
9.编写WEB-INF/dispatcher-servlet.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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!-- 配置扫描路径 -->
<context:component-scan base-package="com.it18zhang.ssm.web.controller" />
<!-- 使用注解驱动 -->
<mvc:annotation-driven />
<!-- 内部资源视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/" />
<property name="suffix" value=".jsp"/>
</bean>
</beans>
spring mvc静态资源部分
-----------------------
1.描述
html
image
css
js
2.在[dispatcher-servlet.xml]添加如下元素
<mvc:resources mapping="/jsssss/**" location="/js/"/>
<mvc:resources mapping="/css/**" location="/css/"/>
<mvc:resources mapping="/images/**" location="/images/"/>
<mvc:resources mapping="/html/**" location="/html/"/>
3.常见相关目录
/web/js
/web/css
/web/images
/web/html
4.放置相应文件
/web/html/hello.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Hello.html</title>
</head>
<body>
<div>hello</div>
<table>
<tr>
<td>ID</td>
<td>name</td>
<td>age</td>
</tr>
<tr>
<td>1</td>
<td>tom</td>
<td>12</td>
</tr>
<tr>
<td>2</td>
<td>tomas</td>
<td>13</td>
</tr>
<tr>
<td>3</td>
<td>tomasLee</td>
<td>4</td>
</tr>
</table>
</body>
</html>
5.启动程序访问
http://localhost:9090/html/hello.html
css选择器
---------------
table //标签选择
#id //id选择
.class-name //类选择
tabble td //后台选择
中文乱码
--------------------
1.jsp页面使用<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" language="java" %>进行utf8码声明。
2.在web.xml文件中，加入filter。
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!-- 指定spring的配置文件beans.xml -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:beans.xml</param-value>
</context-param>
<!-- 确保web服务器启动时，完成spring的容器初始化 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
<filter-name>characterEncodingFilter</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>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 配置分发器Servlet -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
3.确认mysql使用utf8编码，可以修改mysql的编码.
[mysql安装目录/my.ini]
uft8
4.spring中的数据库连接地址url中显式指定编码.
[beans.xml]
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mybatis?user=root&password=root&useUnicode=true&characterEncoding=utf8"/>
unicode : 2 //两个字节
ascii : 1 //7
iso8859 : 1 //8
utf8 //3
gbk //2
分页
-----------------
0.技术背景
mysql:
select * from users limit 10 10
1.dao + service
2.userList.jsp
3.
4.
5.
图1
图2
