MyBatis使用自定义TypeHandler转换类型的实现方法

birthday = #{birthday, jdbcType=DATE},

/**
 * Welcome to https://waylau.com
 */
package com.waylau.lite.mall.type;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.DateFormat;
import java.util.Date;

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedJdbcTypes;
import org.apache.ibatis.type.MappedTypes;

/**
 * 自定义TypeHandler，用于将日期转为'yyyy-MM-dd'
 * 
 * @since 1.0.0 2018年10月10日
 * @author <a href="https://waylau.com" rel="external nofollow" >Way Lau</a>
 */
@MappedJdbcTypes(JdbcType.DATE)
@MappedTypes(Date.class)
public class DateShortTypeHandler extends BaseTypeHandler<Date> {

 @Override
 public void setNonNullParameter(PreparedStatement ps, int i, Date parameter, JdbcType jdbcType)
  throws SQLException {
 DateFormat df = DateFormat.getDateInstance();
 String dateStr = df.format(parameter);
 ps.setDate(i, java.sql.Date.valueOf(dateStr));
 }

 @Override
 public Date getNullableResult(ResultSet rs, String columnName) throws SQLException {
 java.sql.Date sqlDate = rs.getDate(columnName);
 if (sqlDate != null) {
  return new Date(sqlDate.getTime());
 }
 return null;
 }

 @Override
 public Date getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
 java.sql.Date sqlDate = rs.getDate(columnIndex);
 if (sqlDate != null) {
  return new Date(sqlDate.getTime());
 }
 return null;
 }

 @Override
 public Date getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
 java.sql.Date sqlDate = cs.getDate(columnIndex);
 if (sqlDate != null) {
  return new Date(sqlDate.getTime());
 }
 return null;
 }

}

<!-- 自定义 -->
<!--声明TypeHandler bean-->
<bean id="dateShortTypeHandler" class="com.waylau.lite.mall.type.DateShortTypeHandler"/>

<!-- MyBatis 工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
 <property name="dataSource" ref="dataSource" />
 
 <!--TypeHandler注入-->
 <property name="typeHandlers" ref="dateShortTypeHandler"/>
</bean>

birthday = #{birthday, jdbcType=DATE},

birthday = #{birthday, typeHandler=com.waylau.lite.mall.type.DateShortTypeHandler},