因为oracle与mysql语句的执行差别，使用mybatis批量插入/更新操作时mapper文件的配置方法不尽相同， oracle库的配置文件和mysql库的配置文件写法如下，备用。

<?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">
<mapper namespace="com.whg.test.userBean">
	<resultMap type="userBean" id="userMap">
		<id property="USER_ID" column="USER_ID" />
		<result property="USER_NAME" column="USER_NAME" />
		<result property="USER_CODE" column="USER_CODE" />
		<result property="INS_TIME" column="INS_TIME" />
	</resultMap>
	<!-- 批量插入  oracle的配置文件写法-->
	<insert id="addUserByBatch" parameterType="java.util.List">
	    insert into USER_TEST (
	    USER_ID,
	    USER_NAME,
	    USER_CODE,
	    INS_TIME) 
		(
	    <foreach collection="list" item="item" index="index" separator="UNION ALL"> 
		    select
		    #{item.USER_ID,jdbcType=VARCHAR},
		    #{item.USER_NAME,jdbcType=VARCHAR},
		    #{item.USER_CODE,jdbcType=VARCHAR},
			SYSDATE
		from dual
	    </foreach>
	    )
	</insert>
	
	<!-- 批量插入  MYSQL 数据库的配置文件写法-->
	<insert id="addfkxxByBatch" parameterType="java.util.List">
	    insert into USER_TEST (
	    USER_ID,
	    USER_NAME,
	    USER_CODE,
	    INS_TIME) 
	    values
	    <foreach collection="list" item="item" index="index" separator=","> 
		    (
		    #{item.USER_ID,jdbcType=VARCHAR},
		    #{item.USER_NAME,jdbcType=VARCHAR},
		    #{item.USER_CODE,jdbcType=VARCHAR}
			SYSDATE
			)
	    </foreach>
	</insert>
</mapper>