批量插入sql语句:
INSERT INTO table (field1,field2,field3) VALUES ('a',"b","c"), ('a',"b","c"),('a',"b","c")
mybatis通过foreach循环拼装了如上的sql语句。
一、
1 <??> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper 4 namespace="com.xxx.mapper.XXXRecordMapper"> 5 <resultMap id="BaseResultMap" type="com.xxx.model.XXXRecord"> 6 <id column="AutoId" property="autoid" jdbcType="BIGINT" /> 7 <result column="UserId" property="userid" jdbcType="BIGINT" /> 8 <result column="NoticedTime" property="noticedtime" jdbcType="TIMESTAMP" /> 9 </resultMap>10 <sql id="Base_Column_List">11 AutoId, UserId, NoticedTime12 </sql>13 <!-- myself:批量插入 -->14 <insert id="insertBatch" parameterType="java.util.List">15 insert into T_XXXRecord (AutoId, UserId, NoticedTime) values16 <foreach collection="list" item="item" index="index" separator=",">17 (#{item.autoid,jdbcType=BIGINT},18 #{item.userid,jdbcType=BIGINT},19 #{item.noticedtime,jdbcType=TIMESTAMP})20 </foreach>21 </insert>22 </mapper>
说明:
- mysql批量插入的限制是一次批量:1M
- 我这里插入的List,如上就好,如果是其他结构,查看这篇博客:http://www.cnblogs.com/admol/articles/4248159.html
- collection属性:
1.如果传入的是单参数且参数类型是一个List的时候,collection属性值为list
2.如果传入的是单参数且参数类型是一个array数组的时候,collection的属性值为array
3.如果传入的参数是多个的时候,我们就需要把它们封装成一个Map了,当然单参数也可以封装成map
原标题:第四章 mybatis批量insert
关键词:mybatis