mybatis 传入数字字符串被强转成int_MyBatis 自定义 typeHandler

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 { 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

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

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

2e204b7ceed1f96b88d31d8660160dbb.png

书写index.jsp

Hello World!

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

%>

已经查询成功

c79d899bfb47abbc1a7fc139e4b3c13e.png

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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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 Connection2019-04-13 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: 12019-04-13 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

作者：mySoul__

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