Mybatis框架-resultMap元素的自動映射級別

resultMap的自動映射級別:分為三種：NONE  PARTIAL  FULL

其中默認的屬性是：PARTIAL：開啟自動匹配，會自動匹配數據庫中的字段名和實體類中的屬性名，如果一致，就能匹配上，如果不一致，就不能進行匹配

mybatis-config.xml

 

 UserMapper.xml

 

 UserMapper.java

 

編寫測試方法：

@Test
    public void test9() {
        Map<String, String> map = new HashMap<String, String>();
        map.put("userName1", "趙");
        map.put("userRole1", "3");
    
        SqlSession sqlSession = null;
        java.util.List<User> userList2 = new ArrayList<User>();
        try {
            sqlSession = MyBatisUtil.createSqlSession();
            //使用mapper映射的方式實現
            //userList2 = sqlSession.selectList("cn.smbms.dao.user.UserMapper.getUserListByUserName",userNameString);
            //調用mapper接口的方式實現
            userList2 = sqlSession.getMapper(UserMapper.class).getUserListByUserName5(map);
            int size = userList2.size();
            mlogger.info("獲取到的記錄數是：" + size);

        } catch (Exception e) {
            // TODO: handle exception
        } finally {
            // 最后一定要注意：關閉會話
            MyBatisUtil.closeSqlSession(sqlSession);

        }
        for (User user2 : userList2) {
            mlogger.info("用戶名：" + user2.getUserName() + ",密碼：" + user2.getUserPassword()+"，用戶角色："+user2.getUserRoleName()+"地址："+user2.getAddress());
        }

    }

運行結果：

[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: 趙(String), 3(String)
[INFO] 2019-11-04 22:27:40,099 cn.smbms.dao.test.UserMapperTest - 獲取到的記錄數是：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 - 用戶名：趙燕,密碼：0000000，用戶角色：普通員工地址：北京市海淀區回龍觀小區10號樓

如果不想進行自動匹配，只需設置autoMappingBehavior的屬性值為NONE,就把自動匹配的功能關掉了

mybatis-config.xml

 

UserMapper.xml

 

 UserMapper.java

 

 編寫測試方法：

@Test
    public void test9() {
        Map<String, String> map = new HashMap<String, String>();
        map.put("userName1", "趙");
        map.put("userRole1", "3");
    
        SqlSession sqlSession = null;
        java.util.List<User> userList2 = new ArrayList<User>();
        try {
            sqlSession = MyBatisUtil.createSqlSession();
            //使用mapper映射的方式實現
            //userList2 = sqlSession.selectList("cn.smbms.dao.user.UserMapper.getUserListByUserName",userNameString);
            //調用mapper接口的方式實現
            userList2 = sqlSession.getMapper(UserMapper.class).getUserListByUserName5(map);
            int size = userList2.size();
            mlogger.info("獲取到的記錄數是：" + size);

        } catch (Exception e) {
            // TODO: handle exception
        } finally {
            // 最后一定要注意：關閉會話
            MyBatisUtil.closeSqlSession(sqlSession);

        }
        for (User user2 : userList2) {
            mlogger.info("用戶名：" + user2.getUserName() + ",密碼：" + user2.getUserPassword()+"，用戶角色："+user2.getUserRoleName()+"地址："+user2.getAddress());
        }

    }

運行結果：

[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: 趙(String), 3(String)
[INFO] 2019-11-04 22:36:38,742 cn.smbms.dao.test.UserMapperTest - 獲取到的記錄數是：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 - 用戶名：趙燕,密碼：null，用戶角色：普通員工地址：null