欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识！
您现在的位置是： 首页  >  IT编程

MyBatis自定义typeHandler的完整实例

程序员文章站 2024-02-22 22:39:16
自定义typehandler 对于自定义typehandler来说,需要在配置文件中注册typehandlers 然后需要实现typehandler接口, 一个例子...

自定义typehandler

对于自定义typehandler来说,需要在配置文件中注册typehandlers 然后需要实现typehandler接口,

一个例子

首先编写调度的处理类

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<string> {
 private static logger logger = logmanager.getlogger();

 /**
  * 对预编译的sql语句进行设置的时候,
  * @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");
  // 设置预编译的sql对象,的string
  ps.setstring(i, parameter);
 }

 /**
  * 获得结果的时候,获取到列名的时候,调度此方法
  * @param rs
  * @param columnname
  * @return
  * @throws sqlexception
  */
 @override
 public string getresult(resultset rs, string columnname) throws sqlexception {
  logger.info("使用自定义类型,结果获取列名字符串");
  return rs.getstring(columnname);
 }

 /**
  * 获取结果集中的index
  * @param rs
  * @param columnindex
  * @return
  * @throws sqlexception
  */
 @override
 public string getresult(resultset rs, int columnindex) throws sqlexception {
  logger.info("在结果集中获取columnindex");
  return rs.getstring(columnindex);
 }

 /**
  * 获取结果集中的下标对应的字符串
  * @param cs
  * @param columnindex
  * @return
  * @throws sqlexception
  */
 @override
 public string getresult(callablestatement cs, int columnindex) throws sqlexception {
  logger.info("结果集中,下标获取到字符串");
  return cs.getstring(columnindex);
 }
}

再次编写配置文件

<typehandlers>
 <typehandler jdbctype="varchar" javatype="string" handler="com.ming.mybatis.stringtypehandler">
 </typehandlers>

传入数据库的为的varchar类型,javatype类型为string类型,调度的类为com.ming.mybatis.stringtypehandler

修改映射文件,说明那些需要对结果进行修改

<?xml version="1.0" encoding="utf-8" ?>
<!doctype mapper public "-//mybatis.org//dtd mapper 3.0//en"
 "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!-- 定义接口类 -->
<mapper namespace="com.ming.mybatis.pojo.rolemapper">
 <!-- id表示标签标识 type标识结果的返回类型,其中role为在配置文件中使用的别名 role类 -->
 <resultmap type="role" id="rolemap">
 <!-- id为主键映射关系 其中数据库中的id为主键 -->
 <id column="id" property="id" javatype="int" jdbctype="integer"/>
 <!-- result为其他基本数据类型和实体类之间的映射 映射关系为role_name 到 rolename之间的映射 数据类型为string到varchar之间的映射关系 -->
 <result column="role_name" property="rolename" javatype="string" jdbctype="varchar"/>
 <!-- 这里使用typehandler表示遇到此处理集的时候,将会执行com.ming.mybatis.stringtypehandler -->
 <result column="note" property="note" typehandler="com.ming.mybatis.stringtypehandler"/>
 </resultmap>
 
 <!-- 书写sql语句 定义使用resultmap为rolemap-->
 <select id="getrole" parametertype="int" resultmap="rolemap">
 select id, role_name, note from t_role4 where id = #{id}
 </select>
 
</mapper>

其中传入的参数为int类型,由于结果中mybatis没有int类型,对应的是integer类型,在mysql中两者类型相同,所以修改如上所示,表类型

MyBatis自定义typeHandler的完整实例

书写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" %>
<html>
<body>
<h2>hello world!</h2>

<%
  long starttime = system.currenttimemillis(); //获取开始时间
  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(); //获取结束时间

%>
<%=role.getnote()%>
</body>
</html>

已经查询成功

MyBatis自定义typeHandler的完整实例

查看日志文件,日志文件已经输出相关信息 

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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:33.276 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:33.390 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:33.519 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:33.639 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:33.748 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:33.870 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:33.994 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:34.133 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:34.252 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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) - 使用自定义类型,结果获取列名字符串
2019-04-13 05:03:34.380 [info ] com.ming.mybatis.stringtypehandler.getresult(stringtypehandler.java:48) - 使用自定义类型,结果获取列名字符串
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.

ps 类型转换的问题

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，谢谢大家对的支持。

上一篇： java 抓取网页内容实现代码

下一篇： 编写脚本令Xtrabackup对MySQL数据进行备份的教程

推荐阅读