Mybatis in条件传参的三种实现方式(直接$,List,[])

    int deleteMenuByIdList(String idlist,int delcount,int lastsort);
    int deleteMenuByIdList(List<String> idlist, int delcount,int lastsort);
    int deleteMenuByIdList(String[] idlist, int delcount,int lastsort);

    //用这种写法方便，idlist直接拼接好，xml中用 in ${idlist}接受参数
    int deleteMenuByIdList(@Param("idlist")String idlist, @Param("delcount")int delcount, @Param("lastsort")int lastsort);
    //用这种写法直接传List对象，xml中再写循环拼接，麻烦
    int deleteMenuByIdList2(@Param("idlist")List<String> idlist, @Param("delcount")int delcount, @Param("lastsort")int lastsort);
    //用这种写法直接传String[]数组，xml中再写循环拼接，麻烦
    int deleteMenuByIdList3(@Param("idlist")String[] idlist, @Param("delcount")int delcount, @Param("lastsort")int lastsort);

1，
    <delete id="deleteMenuByIdList" >
      delete from s_menu  where menu_id in ${idlist};
      update s_menu set sort=sort-#{delcount} where sort >= #{lastsort} and menu_id not in ${idlist};
    </delete>
 
2，
    <delete id="deleteMenuByIdList2" >
        delete from s_menu where menu_id in
        <foreach collection="idlist" item="menu_id" separator="," open="(" close=")">
            #{menu_id}
        </foreach>
      ;update s_menu set sort=sort-#{delcount} where sort >= #{lastsort} and menu_id not in
       <foreach collection="idlist" item="menu_id" separator="," open="(" close=")">
           #{menu_id}
       </foreach>;
    </delete>
 
3，
    <delete id="deleteMenuByIdList3" >
        delete from s_menu where menu_id in
        <foreach collection="idlist" item="menu_id" separator="," open="(" close=")">
            #{menu_id}
        </foreach>
        ;update s_menu set sort=sort-#{delcount} where sort >= #{lastsort} and menu_id not in
        <foreach collection="idlist" item="menu_id" separator="," open="(" close=")">
            #{menu_id}
        </foreach>;
    </delete>