Spring 4.x+Spring MVC 4.x+MyBatis 3.x 整合（四）Spring 3.1.0 整合

1 Spring下载与安装

在第一篇《Spring 3.x+Spring MVC 3.x+MyBatis 3.x 整合（一）Spring MVC 环境搭建》中已经加入了spring的所有jar包，这里不再说明。

2 修改Web配置文件

为web.xml添加如下配置：

<!-- Spring 配置 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value><!-- 可以把配置文件放在WEB-INF下，然后使用如下配置<param-value>/WEB-INF/applicationContext.xml</param-value> --></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>

完整的web.xml内容如下：

<?xml version="1.0" encoding="UTF-8"?><web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"><display-name></display-name><context-param><param-name>webAppRootKey</param-name><param-value>whowii.website2</param-value></context-param><!-- log4j 配置 --><context-param><param-name>log4jConfigLocation</param-name><param-value>WEB-INF/log4j.properties</param-value></context-param><context-param><param-name>log4jRefreshInterval</param-name><param-value>60000</param-value></context-param><listener><listener-class>org.springframework.web.util.Log4jConfigListener</listener-class></listener><!-- Spring 配置 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value><!-- 可以把配置文件放在WEB-INF下，然后使用如下配置<param-value>/WEB-INF/applicationContext.xml</param-value> --></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- spring mvc 配置--><servlet><!-- 该名称将影响 xxx-servlet.xml 配置文件名称 --><servlet-name>spring</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- load-on-startup：表示启动容器时初始化该Servlet --><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>spring</servlet-name><!-- url-pattern：表示哪些请求交给Spring Web MVC处理， "/"是用来定义默认servlet映射的。也可以如"*.html"表示拦截所有以html为扩展名的请求。 --><url-pattern>*.do</url-pattern></servlet-mapping><!-- 默认首页配置 --><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

3 增加spring配置文件

在src目录下创建applicationContext.xml配置文件，内容如下：

<?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:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="           http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd           http://www.springframework.org/schema/tx           http://www.springframework.org/schema/tx/spring-tx-3.0.xsd          http://www.springframework.org/schema/context           http://www.springframework.org/schema/context/spring-context-3.0.xsd           http://www.springframework.org/schema/aop           http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">          <!-- 自动扫描业务包 -->  <context:component-scan base-package="com.whowii.core.service.impl" /></beans>

4 修改java类

本测试代码最终达到的目标是，为Action注入Service实例。

A.新增服务接口：com.whowii.core.service.UserService，内容如下：

package com.whowii.core.service;public interface UserService {public String getMsg();}

B.新增服务实现类：com.whowii.core.service.impl.UserServiceImpl，内容如下：

package com.whowii.core.service.impl;import org.springframework.stereotype.Service;import com.whowii.core.service.UserService;@Service("userService")public class UserServiceImpl implements UserService {public String getMsg() {return "UserServiceImpl";}}

注意Service注解。

C.修改EnterController类，增加类型为UserService的属性userService，最终的代码如下：

package com.whowii.core.action;import javax.annotation.Resource;import org.apache.log4j.Logger;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 com.whowii.core.service.UserService;@Controller@RequestMapping(value = "/manage/enter")public class EnterController {private Logger logger = Logger.getLogger(getClass());private UserService userService;@Resource(name = "userService")public void setUserService(UserService userService) {this.userService = userService;}// 访问URL：website_java2/enter/index.do@RequestMapping(value = "/index", method = RequestMethod.GET)public String index(String id, Model model) {logger.info("访问了index方法，id=" + id);model.addAttribute("title", "系统登录");model.addAttribute("date", this.userService.getMsg());return "manage/enter/index";}}

这里通过Resource注解，注入UserService实例。

4 测试访问

启动tomcat，打开浏览器访问：http://localhost:8180/website_java2/manage/enter/index.do

打开的页面应该是这样的：