resultMap的自动映射级别:分为三种：NONE PARTIAL FULL
其中默认的属性是：PARTIAL：开启自动匹配，会自动匹配数据库中的字段名和实体类中的属性名，如果一致，就能匹配上，如果不一致，就不能进行匹配
mybatis-config.xml
UserMapper.xml
UserMapper.java
编写测试方法：
1 @Test 2 public void test9() { 3 Map<String, String> map = new HashMap<String, String>(); 4 map.put("userName1", "赵"); 5 map.put("userRole1", "3"); 6 7 SqlSession sqlSession = null; 8 java.util.List<User> userList2 = new ArrayList<User>(); 9 try { 10 sqlSession = MyBatisUtil.createSqlSession(); 11 //使用mapper映射的方式实现 12 //userList2 = sqlSession.selectList("cn.smbms.dao.user.UserMapper.getUserListByUserName",userNameString); 13 //调用mapper接口的方式实现 14 userList2 = sqlSession.getMapper(UserMapper.class).getUserListByUserName5(map); 15 int size = userList2.size(); 16 mlogger.info("获取到的记录数是：" + size); 17 18 } catch (Exception e) { 19 // TODO: handle exception 20 } finally { 21 // 最后一定要注意：关闭会话 22 MyBatisUtil.closeSqlSession(sqlSession); 23 24 } 25 for (User user2 : userList2) { 26 mlogger.info("用户名：" + user2.getUserName() + ",密码：" + user2.getUserPassword()+"，用户角色："+user2.getUserRoleName()+"地址："+user2.getAddress()); 27 } 28 29 }
运行结果：
1 [DEBUG] 2019-11-04 22:27:39,810 cn.smbms.dao.user.UserMapper.getUserListByUserName5 - ==> Preparing: select a.*,r.roleName from smbms_user a,smbms_role r where username like CONCAT ('%',?,'%') and userRole = ? and a.userRole=r.id 2 [DEBUG] 2019-11-04 22:27:39,990 cn.smbms.dao.user.UserMapper.getUserListByUserName5 - ==> Parameters: 赵(String), 3(String) 3 [INFO] 2019-11-04 22:27:40,099 cn.smbms.dao.test.UserMapperTest - 获取到的记录数是：1 4 [DEBUG] 2019-11-04 22:27:40,099 org.apache.ibatis.transaction.jdbc.JdbcTransaction - Resetting autocommit to true on JDBC Connection [com.mysql.jdbc.JDBC4Connection@3caa4b] 5 [DEBUG] 2019-11-04 22:27:40,099 org.apache.ibatis.transaction.jdbc.JdbcTransaction - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@3caa4b] 6 [DEBUG] 2019-11-04 22:27:40,099 org.apache.ibatis.datasource.pooled.PooledDataSource - Returned connection 3975755 to pool. 7 [INFO] 2019-11-04 22:27:40,099 cn.smbms.dao.test.UserMapperTest - 用户名：赵燕,密码：0000000，用户角色：普通员工地址：北京市海淀区回龙观小区10号楼
如果不想进行自动匹配，只需设置autoMappingBehavior的属性值为NONE,就把自动匹配的功能关掉了
mybatis-config.xml
UserMapper.xml
UserMapper.java
编写测试方法：
1 @Test 2 public void test9() { 3 Map<String, String> map = new HashMap<String, String>(); 4 map.put("userName1", "赵"); 5 map.put("userRole1", "3"); 6 7 SqlSession sqlSession = null; 8 java.util.List<User> userList2 = new ArrayList<User>(); 9 try { 10 sqlSession = MyBatisUtil.createSqlSession(); 11 //使用mapper映射的方式实现 12 //userList2 = sqlSession.selectList("cn.smbms.dao.user.UserMapper.getUserListByUserName",userNameString); 13 //调用mapper接口的方式实现 14 userList2 = sqlSession.getMapper(UserMapper.class).getUserListByUserName5(map); 15 int size = userList2.size(); 16 mlogger.info("获取到的记录数是：" + size); 17 18 } catch (Exception e) { 19 // TODO: handle exception 20 } finally { 21 // 最后一定要注意：关闭会话 22 MyBatisUtil.closeSqlSession(sqlSession); 23 24 } 25 for (User user2 : userList2) { 26 mlogger.info("用户名：" + user2.getUserName() + ",密码：" + user2.getUserPassword()+"，用户角色："+user2.getUserRoleName()+"地址："+user2.getAddress()); 27 } 28 29 }
运行结果：
1 [DEBUG] 2019-11-04 22:36:38,393 cn.smbms.dao.user.UserMapper.getUserListByUserName5 - ==> Preparing: select a.*,r.roleName from smbms_user a,smbms_role r where username like CONCAT ('%',?,'%') and userRole = ? and a.userRole=r.id 2 [DEBUG] 2019-11-04 22:36:38,623 cn.smbms.dao.user.UserMapper.getUserListByUserName5 - ==> Parameters: 赵(String), 3(String) 3 [INFO] 2019-11-04 22:36:38,742 cn.smbms.dao.test.UserMapperTest - 获取到的记录数是：1 4 [DEBUG] 2019-11-04 22:36:38,742 org.apache.ibatis.transaction.jdbc.JdbcTransaction - Resetting autocommit to true on JDBC Connection [com.mysql.jdbc.JDBC4Connection@ed0220c] 5 [DEBUG] 2019-11-04 22:36:38,742 org.apache.ibatis.transaction.jdbc.JdbcTransaction - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@ed0220c] 6 [DEBUG] 2019-11-04 22:36:38,742 org.apache.ibatis.datasource.pooled.PooledDataSource - Returned connection 248521228 to pool. 7 [INFO] 2019-11-04 22:36:38,752 cn.smbms.dao.test.UserMapperTest - 用户名：赵燕,密码：null，用户角色：普通员工地址：null