mybatis总结（六）之mybatis和spring进行整合

一、添加jar包
mybatis-spring包下载地址：https://github.com/mybatis/spring/releases

二、原始dao方式开发

1.dao层实现类继承sqlSessionDaoSupport

2.在spring配置文件中dao层注入sqlSessionFactory

3.测试代码

package test;

import static org.junit.Assert.*;

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

import me.ssm.Dao.UserDao;
import me.ssm.po.User;
public class test01 {
    private ApplicationContext applicationcontext;
	@Before
	public void setUp() throws Exception {
	  applicationcontext =new ClassPathXmlApplicationContext("spring/applicationContext.xml");
	}

	@Test
	public void test() throws Exception {
		UserDao userDao = (UserDao) applicationcontext.getBean("userDao");
		User user = userDao.findUserById(1);
		System.out.println(user);
	}

}
4.测试结果

三、mapper代理开发方式
1.首先要遵循mapper开发规范
详见https://blog.youkuaiyun.com/qq_42952331/article/details/87396050
2.在spring配置文件中进行配置

<!-- <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean" >
  设置代理类的接口
 <property name="mapperInterface" value="me.ssm.mapper.UserMapper"></property>
  依赖注入sqlsessionFactory
  <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean> -->

<!-- 配置多个Mapper代理类 -->
 <!-- **自动扫描的mapper的id为mapper的类名，首字母小写** -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
  <!-- 配置扫描的包，如果有多个包，则包名之间用半角逗号分隔开 -->
  <property name="basePackage" value="me.ssm.mapper"></property>
  <!--  配置sqlsessionfactory-->
  <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>

3.测试代码

package test;

import static org.junit.Assert.*;

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

import me.ssm.mapper.UserMapper;
import me.ssm.po.User;

public class testMapper {
	private ApplicationContext applicationcontext;
	@Before
	public void setUp() throws Exception {
		applicationcontext =new ClassPathXmlApplicationContext("spring/applicationContext.xml");
	}

	@Test
	public void test() {
		UserMapper userMapper = (UserMapper) applicationcontext.getBean("userMapper");
		User user = userMapper.findUserById(1);
		System.out.println(user);
	}

}

4.测试结果