JAVAWEB开发批量删除，SSM的几种情况

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>VUE联系</title>
    <!--自动识别最新稳定版本-->
    <!--<script src="https://unpkg.com/vue/dist/vue.min.js"></script>-->
    <!--<script src="https://unpkg.com/vue@2.6.10/dist/vue.min.js"></script>-->
    <script src="../../js/jquery-3.3.1.min.js"></script>
    <style type="text/css">
        table{
            border: black 1px solid;
        }
        table td{border:1px solid #00b7ee;background-color: #6ce26c }
      th{background-color: #d5008f}
    </style>
</head>
<body>
<table  CELLPADDING="1" CELLSPACING="1">

        <input type="button" onclick="batchDelete()" value="删除"/>
        <input type="button" onclick="boxAll()" value="反选/全选"/>

    <tr>
        <th>编号</th>
        <th>电话</th>
        <th>密码</th>
        <th>邮箱</th>
        <th>时间</th>
    </tr>
<#if userList??>
    <#list userList as item>
    <tr>
        <td>
           <input type="checkbox" name="userNmae" value="${item.id}" />
        </td>
        <td>
            <span>${item.phone}</span>
        </td>
        <td>
            <span>${item.password}</span>
        </td>
        <td>
            <span>${item.email}</span>
        </td>
        <td>
            <span>${item.times}</span>
        </td>
    </tr>
</#list>
</#if>

</table>
</body>
<script>
    function batchDelete(){
        //判断至少选择了一项
        var checkedNum = $("input[type='checkbox']:checked").length;
        if (checkedNum == 0) {
            alert("至少选择一项删除！");
            return;
        }
        if (confirm("确定删除选中的用户？")) {
            var userList = new Array();
            $("input[type='checkbox']:checked").each(function(){
                userList.push($(this).val());
            });
            $.ajax({
                type : "post",
                url : "/user/batchDelete",
                data : {"userList" : userList.toString()},
                dataType:"JSON",
                success : function(){
                    alert("删除成功！");
                    location.reload();
                },
                error : function(){
                    alert("刪除失败！")
                }
            });
        }
    }

    //全选 全不选
    var flag=true;
    function boxAll(){
        var cd=$("input[type=checkbox]");
        for (var i=0;i<cd.length;i++) {
            cd[i].checked=flag;
        }
        flag=!flag;
    }

</script>
</html>

  public String batchDelete(HttpServletRequest request,HttpServletResponse response){
         Result result=new Result();
         String userIdListString= request.getParameter("userList");
                String[] userIdList=userIdListString.split(",");

                try{
                    int num= this.userService.batchDelete(userIdList);
                }catch (Exception e){
                    result.setMessage(ExceptionMes.Error_Message02);
                    result.setNo(ExceptionMes.Error_Code02);
                    log.error(JSON.toJSONString(result));
                }
                result.setMessage(ExceptionMes.Error_Message17);
                result.setNo(ExceptionMes.Error_Code17);
                return  JSON.toJSONString(result);
  }

 <delete id="batchDelete">
        DELETE FROM `user` where `id` in
          <foreach collection="array" item="item" index="index"  open="(" separator="," close=")">
                    #{item}
           </foreach>
    </delete>

分别问前端，后台，和MAPPER.

这里注意前端的Array.toString  到后台接收时只是一个集合的字符串，如果需要传入数组或者集合，需要使用String.split(",")进行分割转换。
                                <!--collection="array"入残维数组-->
                               <!--collection="ids"入残为M安排-->
                               <!--collection="list"入残为集合-->

这三种情况对对号入座我就不多少了