3，从零开始搭建SSHM开发框架（集成Spring MVC）

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目录

本专题博客已共享在(这个可能会更新的稍微一些)

https://code.csdn.net/yangwei19680827/maven_sshm_blog

1，从零开始搭建SSHM开发框架（环境准备）

2，从零开始搭建SSHM开发框架（集成Spring+JPA）

3，从零开始搭建SSHM开发框架（集成Spring MVC）

（还在写呢。。。）4，从零开始搭建SSHM开发框架（集成DWZ+Spring Security）

（还在写呢。。。）5，从零开始搭建SSHM开发框架（DWZ的使用）

（还在写呢。。。）6，从零开始搭建SSHM开发框架（集成Ehcache）

（还在写呢。。。）7，从零开始搭建SSHM开发框架（集成activemq）

（还在写呢。。。）8，从零开始搭建SSHM开发框架（集成Mybatis）

（还在写呢。。。）9，从零开始搭建SSHM开发框架（集成Redis）

1.修改pom.xml，增加spring-mvc 的依赖

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.wiker</groupId>
    <artifactId>sshm</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>sshm Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <properties>
        <hibernate-version>5.1.0.Final</hibernate-version>
        <spring-version>4.2.5.RELEASE</spring-version>
        <log4j-version>1.2.17</log4j-version>
        <jack-json-version>2.7.3</jack-json-version>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <jdk.version>1.8</jdk.version>
    </properties>
    <dependencies>

        <!-- Hibernate -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate-version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>${hibernate-version}</version>
        </dependency>

        <!-- mysql 驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>

        <!-- Spring,JPA start -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>1.9.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring-version}</version>
        </dependency>

        <!-- Spring MVC -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring-version}</version>
        </dependency>

        <!-- 阿里的数据源 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.22</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j-version}</version>
        </dependency>

        <!-- jackson -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jack-json-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jack-json-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jack-json-version}</version>
        </dependency>


        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>

        <!-- JSP /Servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.0-b01</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring-version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <finalName>sshm</finalName>
    </build>
</project>

主要新增了如下选项

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring-version}</version>
        </dependency>

       <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jack-json-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jack-json-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jack-json-version}</version>
        </dependency>


        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>

2.增加spring-mvc.xml

文件放到WEB-INF/下，如果你的包名和我的不一样，需要修改一下base-package="com.wiker" 中的包名

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">


    <!-- 自动扫描且只扫描@Controller且包名是：com.wiker下的class -->
    <context:component-scan base-package="com.wiker"
        use-default-filters="false">
        <context:include-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>


    <context:property-placeholder location="classpath*:/*.properties" />
    <!-- Application Message Bundle -->
    <bean id="messageSource"
        class="org.springframework.context.support.ResourceBundleMessageSource">
        <property name="basename" value="messages" />
    </bean>

    <!-- Json返回 乱码处理 -->
    <bean
        class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <bean
                    class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />
                <bean
                    class="org.springframework.http.converter.StringHttpMessageConverter">
                    <property name="supportedMediaTypes">
                        <list>
                            <value>text/plain;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
                <!-- Controller 自动转JSON -->
                <bean
                    class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                    <property name="supportedMediaTypes">
                        <list>
                            <value>text/json;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
                <bean
                    class="org.springframework.http.converter.ResourceHttpMessageConverter" />
                <bean
                    class="org.springframework.http.converter.xml.SourceHttpMessageConverter" />
                <bean
                    class="org.springframework.http.converter.xml.XmlAwareFormHttpMessageConverter" />
                <bean
                    class="org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter" />
            </list>
        </property>
    </bean>


    <mvc:annotation-driven />

    <!-- 将无法mapping到Controller的path交给default servlet handler处理 -->
    <mvc:default-servlet-handler />

    <!-- 定义JSP文件的位置 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- JSP 映射路径，有些为了安全也可以配置成/WEB-INF/，这样jsp是无法直接访问的 -->
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 定义无Controller的path<->view直接映射，可以当作欢迎页使用，这里就直接映射到test了 -->
    <mvc:view-controller path="/" view-name="redirect:/test" />
</beans>

3.修改web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

    <context-param>
        <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
        <param-value>messages</param-value>
    </context-param>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:/applicationContext-service.xml
        </param-value>
    </context-param>
    <context-param>
        <param-name>spring.profiles.default</param-name>
        <param-value>production</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 解决乱码的问题 -->
    <filter>
        <filter-name>encodingFilter</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>
    <!-- Spring mvc的配置 -->
    <servlet>
        <servlet-name>springServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
  <display-name>Archetype Created Web Application</display-name>
</web-app>

4.给Service加一个删除的方法

package com.wiker.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.wiker.entity.TestEntity;
import com.wiker.repository.TestDao;

@Service
@Transactional(readOnly = true)
public class TestService {

    @Autowired
    private TestDao testDao;

    @Transactional(readOnly=false)
    public TestEntity add(TestEntity t){
        return testDao.save(t);
    }

    @Transactional(readOnly=false)
    public void del(long id){
        testDao.delete(id);
    }

    public List<TestEntity> getAll(){
        return (List<TestEntity>) testDao.findAll();
    }
}

5.测试Controller

TestController.java

package com.wiker.controller;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

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.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.wiker.entity.TestEntity;
import com.wiker.service.TestService;

//要使用Controller 必须加@Controller注解也可以用@Controller("path")这里面的path相当于本Controller的根路径
//如果配置成@Controller("path"),那么访问的地址应该是：http://localhost:8080/path/test
@Controller
public class TestController {

    //映射JSP测试
    @RequestMapping(value = "test", method = {
            RequestMethod.GET, RequestMethod.POST
        })
    public String test(Model model,String name) {
        model.addAttribute("name", name);
        return "index";
    }

    //测试自动转JSON
    @RequestMapping(value = "test.json", method = {
            RequestMethod.GET, RequestMethod.POST
        })
    @ResponseBody
    public Map<String,Object> testJson(Model model,String name) {
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("name", name);
        return map;
    }

    //和Service结合，实现数据库操作。这里是注入的Service，其实直接注入Dao也是可以的
    //TIPS：Service使用了事务，所以不要直接try catch，不然事务会失效
    @Autowired
    private TestService testService;

    //获取列表
    @RequestMapping(value = "testGetAll", method = {
            RequestMethod.GET, RequestMethod.POST
        })
    public String testGetAll(Model model,String name) {
        List<TestEntity> list = testService.getAll();
        model.addAttribute("list", list);
        return "testList";
    }

    //添加操作，添加后返回列表页面，这里为了简单演示就直接通过redirect的方式
    //真实情况应该是根据业务需求来是重定向还是直接刷新页面等
    @RequestMapping(value = "testAdd", method = {
            RequestMethod.GET, RequestMethod.POST
        })
    public String testGetAll(Model model,TestEntity entity) {
        testService.add(entity);
        List<TestEntity> list = testService.getAll();
        model.addAttribute("list", list);
        return "redirect:/testGetAll";
    }

    //添加操作，添加后返回列表页面，这里为了简单演示就直接通过redirect的方式
    //真实情况应该是根据业务需求来是重定向还是直接刷新页面等
    @RequestMapping(value = "testDel", method = {
            RequestMethod.GET, RequestMethod.POST
        })
    public String testDel(Model model,long id) {
        testService.del(id);
        return "redirect:/testGetAll";
    }
}

6.新增测试的JSP

testList.jsp

<%@ page contentType="text/html;charset=UTF-8" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set var="ctx" value="${pageContext.request.contextPath }"/>
<html>
<body>
<h2>测试数据库操作</h2>
<form action="${ctx }/testAdd" method="post">
<input type="text" name="content">
<input type="submit" value="提交"></input>
</form>
<table style="width:500px;" border="1">
<tr>
<td>ID</td>
<td>Content</td>
<td>操作</td>
<tr>
<c:forEach var="item" items="${list }">
<tr>
<td>${item.id }</td>
<td>${item.content }</td>
<td>
<a href="${ctx }/testDel?id=${item.id}">删除</a>
</td>
<tr>
</c:forEach>
</table>
</body>
</html>

7.来几张效果图

8.Spring mvc扩展用法

上面已经介绍了@ResponseBody，还有其它注解如：

• @PathVariable 用于REST风格

@RequestMapping(value = "test/{name}", method = {
            RequestMethod.GET, RequestMethod.POST
        })
public String test(Model model,@PathVariable String name) {
    model.addAttribute("name", name);
    return "index";
}

那么访问的url就是：http://localhost:8080/test/wiker

• @RequestParam 用于参数绑定

@RequestMapping(value = "test", method = {
            RequestMethod.GET, RequestMethod.POST
        })
public String test(Model model,@RequestParam("testName")String name) {
    model.addAttribute("name", name);
    return "index";
}

那么访问URL就必须改成：http://localhost:8080/test?testName=test

• @RequestMapping 中也有很多高级的用法，比如多个URL映射同一个URL，而且支持正则等。注解中的method属性表示用哪些方法可以方法，GET,POST,DELETE,PUT等都支持，还有一些其它属性，如图：

eclipse 上的maven这点比较方便，想看某个类的源码，Ctrl+点击进去便可以看到，如果没有下载，会自动下载源到到本地的仓库，而且是有注释的源码。IDEA虽然也能下源码，但是点进去看没有注释，不知道是不是我设置的不对~~~

• @InitBinder 可以用于数据精确的绑定

日期转换，这样如果数据提交的是yyyy–MM-dd格式的将自动转换为Date类型。例：

    @InitBinder
    protected void initBinder(WebDataBinder binder) {
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        CustomDateEditor editor = new CustomDateEditor(dateFormat, true);
        binder.registerCustomEditor(Date.class, editor);
    }

也可以手动自编写其它的类型，只需要继承PropertyEditorSupport类便可。需要的同学可以网上搜索一下使用方法

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