项目管理-Mybatis学习源码（一）

import com.tong.mapper.UserMapper; import com.tong.pojo.User; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.junit.Test; import java.io.IOException; import java.io.InputStream; public class TestUserMapper4 { @Test public void testCache1() throws IOException { InputStream is = Resources.getResourceAsStream("SqlMapConfig.xml"); SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); SqlSessionFactory factory = builder.build(is); SqlSession session = factory.openSession(); UserMapper mapper1 = session.getMapper(UserMapper.class); UserMapper mapper2 = session.getMapper(UserMapper.class); User user1 = mapper1.findById(1); System.out.println(user1.hashCode()); System.out.println("-------------------------------------------"); User user2 = mapper2.findById(1); System.out.println(user2.hashCode()); } @Test public void testCache2() throws IOException { InputStream is = Resources.getResourceAsStream("SqlMapConfig.xml"); SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); SqlSessionFactory factory = builder.build(is); SqlSession session1 = factory.openSession(); SqlSession session2 = factory.openSession(); UserMapper mapper1 = session1.getMapper(UserMapper.class); UserMapper mapper2 = session2.getMapper(UserMapper.class); User user1 = mapper1.findById(1); System.out.println(user1.hashCode()); System.out.println("-------------------------------------------"); User user2 = mapper2.findById(1); System.out.println(user2.hashCode()); } @Test public void testCache3() throws IOException { InputStream is = Resources.getResourceAsStream("SqlMapConfig.xml"); SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); SqlSessionFactory factory = builder.build(is); SqlSession session = factory.openSession(); UserMapper mapper1 = session.getMapper(UserMapper.class); UserMapper mapper2 = session.getMapper(UserMapper.class); User user1 = mapper1.findById(1); System.out.println(user1.hashCode()); // session.close(); // session.clearCache(); // session.commit(); mapper1.delete(2); System.out.println("-------------------------------------------"); User user2 = mapper2.findById(1); System.out.println(user2.hashCode()); } @Test public void testCache4() throws IOException { InputStream is = Resources.getResourceAsStream("SqlMapConfig.xml"); SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); SqlSessionFactory factory = builder.build(is); SqlSession session1 = factory.openSession(); SqlSession session2 = factory.openSession(); UserMapper mapper1 = session1.getMapper(UserMapper.class); UserMapper mapper2 = session2.getMapper(UserMapper.class); User user1 = mapper1.findById(1); System.out.println(user1); System.out.println(user1.hashCode()); // 让一级缓存失效 session1.commit(); System.out.println("-------------------------------------------"); User user2 = mapper2.findById(1); System.out.println(user2); System.out.println(user2.hashCode()); } }