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。
一路走来，我们无法猜测将是迎接什么样的风景，
