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  • 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

    一点点学习,一丝丝进步。不懈怠,才不会被时代淘汰
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  • 原文地址:https://www.cnblogs.com/wangbiaohistory/p/11344974.html
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