JAVAWEB開發批量刪除,SSM的幾種情況


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>VUE聯系</title>
    <!--自動識別最新穩定版本-->
    <!--<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="刪除"/>
        <input type="button" onclick="boxAll()" value="反選/全選"/>

    <tr>
        <th>編號</th>
        <th>電話</th>
        <th>密碼</th>
        <th>郵箱</th>
        <th>時間</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(){
        //判斷至少選擇了一項
        var checkedNum = $("input[type='checkbox']:checked").length;
        if (checkedNum == 0) {
            alert("至少選擇一項刪除!");
            return;
        }
        if (confirm("確定刪除選中的用戶?")) {
            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("刪除成功!");
                    location.reload();
                },
                error : function(){
                    alert("刪除失敗!")
                }
            });
        }
    }

    //全選 全不選
    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>

 

 
        

                                    分別問前端,后台,和MAPPER.

                             這里注意前端的Array.toString  到后台接收時只是一個集合的字符串,如果需要傳入數組或者集合,需要使用String.split(",")進行分割轉換。
                                <!--collection="array"入殘維數組-->
                               <!--collection="ids"入殘為M安排-->
                               <!--collection="list"入殘為集合-->

這三種情況對對號入座我就不多少了


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