Spring -Mybatis整合
核心:spring整合mybatis spring-dao.xml
<?xml version="1.0" encoding="UTF8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 创建数据源(数据库信息) -->
<bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT%2B8"/>
<property name="username" value="root"/>
<property name="password" value="123456789"/>
</bean>
<!-- 建立工场 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="datasource"/>
//mybatis的配置文件
<property name="configLocation" value="classpath:mybatis-config.xml"/>
//配置每一个mapper.xml
<property name="mapperLocations" value="classpath:com/zxy/mapper/UserMapper.xml"/>
</bean>
<!--建立一个sqlSession的模板类(在sqlSession和用户之间多一层给每一个用户发送sqlSession) -->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
</beans>
applicationContext.xml
<?xml version="1.0" encoding="UTF8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
//整合所有的spring配置文件 实现核心配置不需要改动 分工明确
<import resource="spring-dao.xml"/>
<!-- 给每一个mapper建立一个sqlSession连接 -->
<bean id="userMapper" class="com.zxy.mapper.UserMapperImpl3">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
mybatis-config.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>
<!--在整合之后, 一般mybatis核心文件中方 别名 和 setting配置 -->
<typeAliases>
<typeAlias type="com.zxy.pojo.User" alias="User"/>
</typeAliases>
</configuration>
UserMapper.java
package com.zxy.mapper;
import com.zxy.pojo.User;
import java.util.List;
public interface UserMapper {
//查询用户
List<User> selectUser();
}
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.zxy.mapper.UserMapper">
<select id="selectUser" parameterType="User" resultType="User">
select * from mybatis.user;
</select>
</mapper>
UserMapperImpl3.java (实现类)
package com.zxy.mapper;
import com.zxy.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
public class UserMapperImpl3 implements UserMapper{
private SqlSessionTemplate sqlSession;
//获取sqlSession的实例
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
@Override
public List<User> selectUser() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.selectUser();
}
}
Test:
import com.zxy.mapper.UserMapper;
import com.zxy.pojo.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyTest {
@Test
public void test01(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
for (User user : userMapper.selectUser()) {
System.out.println(user);
}
}
}