mybatis实战教程(mybatis in action)之六:与Spring MVC 的集成

前面几篇文章已经讲到了mybatis与spring 的集成。但这个时候，所有的工程还不是web工程，虽然我一直是创建的web 工程。今天将直接用mybatis与Spring mvc 的方式集成起来，源码在本文结尾处下载.主要有以下几个方面的配置
1. web.xml 配置 spring dispatchservlet ,比如为:mvc-dispatcher
2. mvc-dispatcher-servlet.xml 文件配置
3. spring applicationContext.XML文件配置(与数据库相关，与mybatis sqlSessionFaction 整合，扫描所有mybatis mapper 文件等.)
4. 编写controller 类
5. 编写页面代码.
先有个大概映像，整个工程图如下:

 1. web.xml 配置 spring dispatchservlet ,比如为:mvc-dispatcher

<?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_3_0.xsd"
	id="WebApp_ID" version="3.0">
	<display-name>zw-mybatis</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
	</welcome-file-list>

	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath*:/config/applicationContext.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<listener>
		<listener-class>
			org.springframework.web.context.ContextCleanupListener
		</listener-class>
	</listener>
	<servlet>
		<servlet-name>mvc-dispatcher</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>mvc-dispatcher</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

 2. 在web.xml 同目录下配置 mvc-dispatcher-servlet.xml 文件,这个文件名前面部分必须与你在web.xml里面配置的DispatcherServlet 的servlet名字对应.其内容为:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc" 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-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/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

	<context:component-scan base-package="com.handly.mybatis.controller" />
	<mvc:annotation-driven />

	<mvc:resources mapping="/static/**" location="/WEB-INF/static/" />
	<mvc:default-servlet-handler />

	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix">
			<value>/WEB-INF/pages/</value>
		</property>
		<property name="suffix">
			<value>.jsp</value>
		</property>
	</bean>

</beans>

 3. 在源码目录 config 目录下配置 spring 配置文件 applicationContext.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:context="http://www.springframework.org/schema/context"
	xmlns:util="http://www.springframework.org/schema/util"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-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/util
         http://www.springframework.org/schema/util/spring-util-2.0.xsd">
	
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url" value="jdbc:mysql://127.0.0.1:3306/mis4_produce?characterEncoding=utf8" />
		<property name="username" value="root" />
		<property name="password" value="123456" />
	</bean>

	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>

	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.handly.mybatis.dao" />
	</bean>

	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!--dataSource属性指定要用到的连接池 -->
		<property name="dataSource" ref="dataSource" />
		<!--configLocation属性指定mybatis的核心配置文件 -->
		<property name="configLocation" value="classpath:/config/Configuration.xml" />

	</bean>


</beans>

 4. 编写 controller 层

package com.handly.mybatis.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import com.handly.mybatis.dao.UserDao;
import com.handly.mybatis.model.User;

import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/user")//请求路径
public class UserController {
	@Autowired
    UserDao userDao;

    @RequestMapping("/list")//请求方法
    public ModelAndView listall(HttpServletRequest request,HttpServletResponse response){
    	List<User> list = userDao.selectUsers("admin");
        if(null!=list && list.size()>0){
        	for(User user: list){
        		System.out.println(user.getUsername());
        		System.out.println(user.getDate());
        	}
        }else{
        	System.out.println("list is null;");
        }
        ModelAndView mav=new ModelAndView("user/list");// 访问页面目录
        mav.addObject("users",list);
        return mav;
    }
}

 添加jar包：

servlet-api.jar、spring-web.jar、spring-webmvc.jar

5. 页面文件:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" isELIgnored="false"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!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>Insert title here</title>
</head>
<body>
	<c:forEach items="${users}" var="user"> 
        ${user.id }--${user.username }--${user.id }<br />
    </c:forEach>
</body>
</html>

  添加jar包：

jstl-1.2.jar