第一种方式

<update id="updateThreadreturnList"  parameterType="java.util.List">  
        update tb_thread set isDelete=0
        where threadId in ( 
    <foreach collection="list" item="item" index="index" open="" close="" separator=",">
        #{item.threadId}
    </foreach>      
        )     
  </update>

第二种方式

注意 需要在数据库添加 &allowMultiQueries=true 
jdbc:mysql://192.168.1.109:3306/healthmanage?characterEncoding=utf-8&allowMultiQueries=true

    <update id="updateQuestionseleteTempalteList"  parameterType="java.util.List">  
    <foreach collection="list" item="item" index="index">
        update tb_question_template_seleteitem_detail set selectedName=#{item.selectedName}
        where 1=1 and  selectedId =#{item.selectedId  };

    </foreach>      
  </update>

原文链接： http://blog.csdn.net/lishaojun0115/article/details/50395669