Mybatis框架-resultMap元素的自动映射级别

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：

 @Test
     public void test9() {
         Map<String, String> map = new HashMap<String, String>();
         map.put("userName1", "赵");
         map.put("userRole1", "3");
 
         SqlSession sqlSession = null;
         java.util.List<User> userList2 = new ArrayList<User>();
         try {
             sqlSession = MyBatisUtil.createSqlSession();
             //使用mapper映射的方式实现
             //userList2 = sqlSession.selectList("cn.smbms.dao.user.UserMapper.getUserListByUserName",userNameString);
             //调用mapper接口的方式实现
             userList2 = sqlSession.getMapper(UserMapper.class).getUserListByUserName5(map);
             int size = userList2.size();
             mlogger.info("获取到的记录数是：" + size);
 
         } catch (Exception e) {
             // TODO: handle exception
         } finally {
             // 最后一定要注意：关闭会话
             MyBatisUtil.closeSqlSession(sqlSession);
 
         }
         for (User user2 : userList2) {
             mlogger.info("用户名：" + user2.getUserName() + ",密码：" + user2.getUserPassword()+"，用户角色："+user2.getUserRoleName()+"地址："+user2.getAddress());
         }
 
     }

运行结果：

 [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
 [DEBUG] 2019-11-04 22:27:39,990 cn.smbms.dao.user.UserMapper.getUserListByUserName5 - ==> Parameters: 赵(String), 3(String)
 [INFO] 2019-11-04 22:27:40,099 cn.smbms.dao.test.UserMapperTest - 获取到的记录数是：1
 [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]
 [DEBUG] 2019-11-04 22:27:40,099 org.apache.ibatis.transaction.jdbc.JdbcTransaction - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@3caa4b]
 [DEBUG] 2019-11-04 22:27:40,099 org.apache.ibatis.datasource.pooled.PooledDataSource - Returned connection 3975755 to pool.
 [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：

 @Test
     public void test9() {
         Map<String, String> map = new HashMap<String, String>();
         map.put("userName1", "赵");
         map.put("userRole1", "3");
 
         SqlSession sqlSession = null;
         java.util.List<User> userList2 = new ArrayList<User>();
         try {
             sqlSession = MyBatisUtil.createSqlSession();
             //使用mapper映射的方式实现
             //userList2 = sqlSession.selectList("cn.smbms.dao.user.UserMapper.getUserListByUserName",userNameString);
             //调用mapper接口的方式实现
             userList2 = sqlSession.getMapper(UserMapper.class).getUserListByUserName5(map);
             int size = userList2.size();
             mlogger.info("获取到的记录数是：" + size);
 
         } catch (Exception e) {
             // TODO: handle exception
         } finally {
             // 最后一定要注意：关闭会话
             MyBatisUtil.closeSqlSession(sqlSession);
 
         }
         for (User user2 : userList2) {
             mlogger.info("用户名：" + user2.getUserName() + ",密码：" + user2.getUserPassword()+"，用户角色："+user2.getUserRoleName()+"地址："+user2.getAddress());
         }
 
     }

运行结果：

 [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
 [DEBUG] 2019-11-04 22:36:38,623 cn.smbms.dao.user.UserMapper.getUserListByUserName5 - ==> Parameters: 赵(String), 3(String)
 [INFO] 2019-11-04 22:36:38,742 cn.smbms.dao.test.UserMapperTest - 获取到的记录数是：1
 [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]
 [DEBUG] 2019-11-04 22:36:38,742 org.apache.ibatis.transaction.jdbc.JdbcTransaction - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@ed0220c]
 [DEBUG] 2019-11-04 22:36:38,742 org.apache.ibatis.datasource.pooled.PooledDataSource - Returned connection 248521228 to pool.
 [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