mybatis注解如何实现对象批量更改

mybatis注解对象批量更改

一、介绍

当有多个对象需要进行更改时，批量修改对象集合List

二、代码

@Update("<script>"
+ "<foreach collection='listUserAnswerRecord' item='item' open='' close=''  separator=';'> "
+ " update t_qb_record_201910"
+ " set answered = 0, progress = 1, answer_sheet = null, gmt_update = #{item.gmtUpdate}"
+ " <where>"
+ "<choose>"
+ "<when test='item.unionid !=null'> unionid=#{item.unionid}</when>"
+ "<otherwise> openid= #{item.openid} </otherwise>"
+ "</choose>"
+ " and goods_id = #{item.goodsId} and charpter_id = #{item.charpterId} and type = #{item.type}"
+ "</where>"
+ "</foreach>"
+ "</script>")
Integer deleteUserAnswerSheet(@Param("listUserAnswerRecord") List<UserAnswerRecordNew> listUserAnswerRecord);

mybatis 注解批量更新、插入

//批量插入
    @Insert({
        "<script>",
        "insert into table(column1, column2) values ",
        "<foreach collection='userLists' item='item' index='index' separator=','>",
        "(#{item.column1}, #{item.column2} )",
        "</foreach>",
        "</script>"
    })
    public int insertUsers(@Param(value="userLists") List<User> userLists);
//批量更新
@Update({
        "<script>",
        "<foreach collection='userLists' item='item' index='index' separator=';'>",
        "update table b",
        "set b.column1= #{item.column1}，b.column2= #{item.column2}  where b.column3= #{item.column3}",
        "</foreach>",
        "</script>"
    })
    public int updateUser(@Param(value="userLists") List<User> userLists);

collection：你传来的集合

item：里面的类

index：就是for循环的i

separator：间隔符

以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。

原文链接：https://blog.csdn.net/CoderYin/article/details/93141862