5.Mybatis Spring整合

分析jar：spring，c3p0,log4j,mysql驱动，mybatis的jar

　　发现管理工厂包没有，mybatis用来整合spring包。

一、 Mapper动态代理开发

sqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<!-- 设置别名 -->
	<typeAliases>
		<!-- 2. 指定扫描包，会把包内所有的类都设置别名，别名的名称就是类名，大小写不敏感 -->
		<package name="com.itheima.mybatis.pojo" />
	</typeAliases>
	
	<mappers>
		<package name="com.itheima.mybatis.mapper"/>
	</mappers>

</configuration>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	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-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

   <!-- 加载配置文件 -->
   <context:property-placeholder location="classpath:db.properties" />

	<!-- 数据库连接池 -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName" value="${jdbc.driver}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<property name="maxActive" value="10" />
		<property name="maxIdle" value="5" />
	</bean>

	<!-- 配置SqlSessionFactory -->
	<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 配置mybatis核心配置文件 -->
		<property name="configLocation" value="classpath:sqlMapConfig.xml" />
		<!-- 配置数据源 -->
		<property name="dataSource" ref="dataSource" />
	</bean>
	
	<!-- Mapper动态代理开发 -->
	<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
		<property name="sqlSessionFactory" ref="sqlSessionFactoryBean"/>
		<property name="mapperInterface" value="com.itheima.mybatis.mapper.UserMapper"/>
	</bean>
	
</beans>

UserMapper

package com.itheima.mybatis.mapper;

import com.itheima.mybatis.pojo.User;

public interface UserMapper {

	public User selectUserById(Integer id);
}

UserMapper.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.itheima.mybatis.mapper.UserMapper">
	
	<select id="selectUserById" parameterType="Integer" resultType="User">
		select * from user where id = #{v}
	</select>
</mapper>

JunitTest

public class JunitTest {

	@Test
	public void testMapper(){
		ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
		//userMapper为前面bean的id，也可以直接UserMapper.class
		UserMapper mapper = (UserMapper) ac.getBean("userMapper");
		User user = mapper.selectUserById(10);
		System.out.println(user);
	}
	
}

 

二、Mapper动态代理扫描开发

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	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-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

   <!-- 加载配置文件 -->
   <context:property-placeholder location="classpath:db.properties" />

	<!-- 数据库连接池 -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName" value="${jdbc.driver}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<property name="maxActive" value="10" />
		<property name="maxIdle" value="5" />
	</bean>

	<!-- 配置SqlSessionFactory -->
	<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 配置mybatis核心配置文件 -->
		<property name="configLocation" value="classpath:sqlMapConfig.xml" />
		<!-- 配置数据源 -->
		<property name="dataSource" ref="dataSource" />
	</bean>
	
	<!-- Mapper动态代理开发 扫描 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 基本包 -->
		<property name="basePackage" value="com.itheima.mybatis.mapper"></property>
	</bean>
	
</beans>

JunitTest

package com.itheima.mybatis.junit;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.itheima.mybatis.mapper.UserMapper;
import com.itheima.mybatis.pojo.User;

public class JunitTest {
	
	@Test
	public void testMapperScan(){
		ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
		//用扫描方法时，没有id了，就换成类名.class
		UserMapper mapper = (UserMapper) ac.getBean(UserMapper.class);
		User user = mapper.selectUserById(10);
		System.out.println(user);
	}
	
}