【狂神说】spring 总结源码 下载

import com.yin.mapper.UserMapper; import com.yin.pojo.User; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import java.io.IOException; import java.util.List; public class MyTest { @Test public void test() throws IOException { /* 思路： 现在整合mybatis后，连接数据库，业务很纯粹，测试类做自己只做自己的事： userMapper，userMapper能调用selectUser()， 它的实现，原来：放在service业务层去做的，现在：spring整合之后，在实现类中定义，这个实现类的方法去操作原来mybatis在测试类中做的事情 */ ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); //真正执行：调用UserMapperImpl实现类， 在applicationContext.xml中是 userMapper UserMapper userMapper = context.getBean("userMapper2", UserMapper.class); List<User> userList = userMapper.selectUser(); for (User user : userList) { System.out.println(user); } /* //加载配置文件 String resources = "mybatis-config.xml"; // 读取配置文件 InputStream inputStream = Resources.getResourceAsStream(resources); //通过 Builder 把流加载进来 SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(inputStream); //用sessionFactory创建openSession 自动提交事务 SqlSession sqlSession = sessionFactory.openSession(true); UserMapper mapper = sqlSession.getMapper(UserMapper.class); List<User> userList = mapper.selectUser(); for (User user : userList) { System.out.println(user); }*/ } }