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MyBatis中怎么自定義typeHandler

本篇文章為大家展示了MyBatis中怎么自定義typeHandler，內(nèi)容簡(jiǎn)明扼要并且容易理解，絕對(duì)能使你眼前一亮，通過(guò)這篇文章的詳細(xì)介紹希望你能有所收獲。

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首先編寫調(diào)度的處理類

package com.ming.MyBatis;


import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.TypeHandler;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class StringTypeHandler implements TypeHandler {
 private static Logger logger = LogManager.getLogger();

 /**
  * 對(duì)預(yù)編譯的Sql語(yǔ)句進(jìn)行設(shè)置的時(shí)候,
  * @param ps
  * @param i
  * @param parameter
  * @param jdbcType
  * @throws SQLException
  */
 @Override
 public void setParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType) throws SQLException {
  logger.info("使用TypeHandler");
  // 設(shè)置預(yù)編譯的sql對(duì)象,的string
  ps.setString(i, parameter);
 }

 /**
  * 獲得結(jié)果的時(shí)候,獲取到列名的時(shí)候,調(diào)度此方法
  * @param rs
  * @param columnName
  * @return
  * @throws SQLException
  */
 @Override
 public String getResult(ResultSet rs, String columnName) throws SQLException {
  logger.info("使用自定義類型,結(jié)果獲取列名字符串");
  return rs.getString(columnName);
 }

 /**
  * 獲取結(jié)果集中的index
  * @param rs
  * @param columnIndex
  * @return
  * @throws SQLException
  */
 @Override
 public String getResult(ResultSet rs, int columnIndex) throws SQLException {
  logger.info("在結(jié)果集中獲取columnIndex");
  return rs.getString(columnIndex);
 }

 /**
  * 獲取結(jié)果集中的下標(biāo)對(duì)應(yīng)的字符串
  * @param cs
  * @param columnIndex
  * @return
  * @throws SQLException
  */
 @Override
 public String getResult(CallableStatement cs, int columnIndex) throws SQLException {
  logger.info("結(jié)果集中,下標(biāo)獲取到字符串");
  return cs.getString(columnIndex);
 }
}

再次編寫配置文件


 
 

傳入數(shù)據(jù)庫(kù)的為的VARCHAR類型,javaType類型為string類型,調(diào)度的類為com.ming.MyBatis.StringTypeHandler

修改映射文件,說(shuō)明那些需要對(duì)結(jié)果進(jìn)行修改





 
 
 
 
 
 
 
 
 
 
 
 
 SELECT id, role_name, note FROM t_role4 WHERE id = #{id}
 
 

其中傳入的參數(shù)為int類型,由于結(jié)果中mybatis沒(méi)有int類型,對(duì)應(yīng)的是INTEGER類型,在MySQL中兩者類型相同,所以修改如上所示,表類型

MyBatis中怎么自定義typeHandler

書寫index.jsp

<%@ page import="org.apache.ibatis.session.SqlSession" %>
<%@ page import="com.ming.Util.SqlSessionFactoryUtil" %>
<%@ page import="com.ming.MyBatis.POJO.RoleMapper" %>
<%@ page import="com.ming.MyBatis.POJO.Role" %>



Hello World!


<%
  long startTime = System.currentTimeMillis(); //獲取開(kāi)始時(shí)間
  SqlSession sqlSession = null;
  Role role = null;
  for(int i = 0; i < 10; i++) {
    try {
      sqlSession = SqlSessionFactoryUtil.openSqlSesion();
      RoleMapper roleMapper = sqlSession.getMapper(RoleMapper.class);
      role = roleMapper.getRole(100);
      sqlSession.commit();
    } catch (Exception e) {
      e.printStackTrace();
      sqlSession.rollback();
    } finally {
      if (sqlSession != null) {
        sqlSession.close();
      }
    }
  }
  long endTime = System.currentTimeMillis(); //獲取結(jié)束時(shí)間

%>
<%=role.getNote()%>

已經(jīng)查詢成功

MyBatis中怎么自定義typeHandler

查看日志文件,日志文件已經(jīng)輸出相關(guān)信息

2019-04-13 05:03:33.181 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:33.181 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:33.182 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.235 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:33.236 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:33.275 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.276 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.277 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:33.277 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.312 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.312 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:33.313 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:33.314 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:33.314 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.346 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:33.348 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:33.386 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.390 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.391 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:33.395 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.442 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.443 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:33.443 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:33.444 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:33.444 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.479 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:33.480 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:33.518 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.519 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.520 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:33.520 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.556 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.557 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:33.558 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:33.558 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:33.558 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.591 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:33.592 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:33.638 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.639 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.640 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:33.640 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.676 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.677 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:33.677 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:33.677 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:33.677 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.711 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:33.712 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:33.747 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.748 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.748 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:33.749 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.780 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.780 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:33.781 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:33.781 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:33.781 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.830 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:33.831 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:33.868 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.870 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.870 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:33.872 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.913 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.914 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:33.914 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:33.915 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:33.915 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:33.956 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:33.957 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:33.994 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.994 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:33.995 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:33.995 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.029 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.029 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:34.030 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:34.030 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:34.030 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.095 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:34.097 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:34.133 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:34.133 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:34.134 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:34.134 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.168 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.169 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:34.170 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:34.170 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:34.171 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.214 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:34.215 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:34.252 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:34.252 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:34.253 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:34.254 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.291 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.291 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.
2019-04-13 05:03:34.292 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.openConnection(JdbcTransaction.java:136) - Opening JDBC Connection
2019-04-13 05:03:34.292 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.popConnection(PooledDataSource.java:397) - Checked out connection 197673257 from pool.
2019-04-13 05:03:34.292 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.setDesiredAutoCommit(JdbcTransaction.java:100) - Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.336 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Preparing: SELECT id, role_name, note FROM t_role4 WHERE id = ? 
2019-04-13 05:03:34.337 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - ==> Parameters: 100(Integer)
2019-04-13 05:03:34.379 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:34.380 [INFO ] com.ming.MyBatis.StringTypeHandler.getResult(StringTypeHandler.java:48) - 使用自定義類型,結(jié)果獲取列名字符串
2019-04-13 05:03:34.380 [DEBUG] org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:143) - <==   Total: 1
2019-04-13 05:03:34.381 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.resetAutoCommit(JdbcTransaction.java:122) - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.415 [DEBUG] org.apache.ibatis.transaction.jdbc.JdbcTransaction.close(JdbcTransaction.java:90) - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@bc84129]
2019-04-13 05:03:34.415 [DEBUG] org.apache.ibatis.datasource.pooled.PooledDataSource.pushConnection(PooledDataSource.java:362) - Returned connection 197673257 to pool.

上述內(nèi)容就是MyBatis中怎么自定義typeHandler，你們學(xué)到知識(shí)或技能了嗎？如果還想學(xué)到更多技能或者豐富自己的知識(shí)儲(chǔ)備，歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道。


文章名稱：MyBatis中怎么自定義typeHandler
文章起源：http://weahome.cn/article/pocohj.html

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