Mybatis学习笔记8：Mybatis与Spring整合

1、整合适配包

2、Mybatis整合

spring-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: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-4.0.xsd
		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-4.0.xsd">

	<!--SpringMVC只是控制网站跳转逻辑  -->
	<!-- 只扫描控制器 -->
	<context:component-scan base-package="com.atguigu.mybatis" use-default-filters="false">
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	
	<!-- 视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/pages/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	
	<!--处理动态资源-->
	<mvc:annotation-driven></mvc:annotation-driven>
	
	<!--处理静态资源-->
	<mvc:default-servlet-handler/>
</beans>

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:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

	<!-- Spring希望管理所有的业务逻辑组件，等。。。 -->
	<context:component-scan base-package="com.atguigu.mybatis">
		<context:exclude-filter type="annotation"
			expression="org.springframework.stereotype.Controller" />
	</context:component-scan>

	<!-- 引入数据库的配置文件 -->
	<context:property-placeholder location="classpath:dbconfig.properties" />
	<!-- Spring用来控制业务逻辑。数据源、事务控制、aop -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="jdbcUrl" value="${jdbc.url}"></property>
		<property name="driverClass" value="${jdbc.driver}"></property>
		<property name="user" value="${jdbc.username}"></property>
		<property name="password" value="${jdbc.password}"></property>
	</bean>
	<!-- spring事务管理 -->
	<bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

	<!-- 开启基于注解的事务 -->
	<tx:annotation-driven transaction-manager="dataSourceTransactionManager"/>
	
	<!-- 
	整合mybatis 
		目的：1、spring管理所有组件。mapper的实现类。
				service==>Dao   @Autowired:自动注入mapper；
			2、spring用来管理事务，spring声明式事务
	-->
	<!--创建出SqlSessionFactory对象  -->
	<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<!-- configLocation指定全局配置文件的位置 -->
		<property name="configLocation" value="classpath:mybatis-config.xml"></property>
		<!--mapperLocations: 指定mapper文件的位置-->
		<property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"></property>
	</bean>
	
	<!--配置一个可以进行批量执行的sqlSession  -->
	<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
		<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactoryBean"></constructor-arg>
		<constructor-arg name="executorType" value="BATCH"></constructor-arg>
	</bean>
	
	<!-- 扫描所有的mapper接口的实现，让这些mapper能够自动注入；
	base-package：指定mapper接口的包名
	 -->
	<mybatis-spring:scan base-package="com.atguigu.mybatis.dao"/>
         
        <!--老版的配置-->
	<!-- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.atguigu.mybatis.dao"></property>
	</bean> -->
	
</beans>

Controller

@Controller
public class EmployeeController {
	
	@Autowired
	EmployeeService employeeService;
	
	@RequestMapping("/getemps")
	public String emps(Map<String,Object> map){
		List<Employee> emps = employeeService.getEmps();
		map.put("allEmps", emps);
		return "list";
	}

}

Service

@Service
public class EmployeeService {
	
	@Autowired
	private EmployeeMapper employeeMapper;
	
	@Autowired
	private SqlSession sqlSession;
	
	public List<Employee> getEmps(){
		//
		//EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
		return employeeMapper.getEmps();
	}

}

DAO

public interface EmployeeMapper {
	
	public Employee getEmpById(Integer id);
	
	public List<Employee> getEmps();
	

}

Mapper.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="com.atguigu.mybatis.dao.EmployeeMapper">

	<!-- public Employee getEmpById(Integer id); -->
	<select id="getEmpById" resultType="com.atguigu.mybatis.bean.Employee">
		select * from tbl_employee where id=#{id}
	</select>
	
	<!--public List<Employee> getEmps();  -->
	<select id="getEmps" resultType="com.atguigu.mybatis.bean.Employee">
		select * from tbl_employee
	</select>
</mapper>

jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!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>员工列表</title>
</head>
<body>
	<table>
			<tr>
				<td>id</td>
				<td>lastName</td>
				<td>email</td>
				<td>gender</td>
			</tr>
		<c:forEach items="${allEmps }" var="emp">
			<tr>
				<td>${emp.id }</td>
				<td>${emp.lastName }</td>
				<td>${emp.email }</td>
				<td>${emp.gender }</td>
			</tr>
		</c:forEach>
	
	</table>

</body>
</html>