自定义JSP防重复提交标签

最新推荐文章于 2025-09-12 15:58:40 发布

转载最新推荐文章于 2025-09-12 15:58:40 发布 · 57 阅读

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CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/u/2351011/blog/2878916

文章标签：

#python #java

本文介绍了一种基于Token的防重复提交机制实现，通过在客户端生成唯一标识符并在服务器端进行验证，确保表单提交不会被重复处理，有效防止了因网络延迟等原因导致的数据错误。

2019独角兽企业重金招聘Python工程师标准>>>

package com.hhwy.tag;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import java.io.IOException;
import java.util.UUID;

/**
 * <br>描 述：防止重复提交
 * <br>创 建 人：Jinzhaoqiang
 * <br>创建时间： 20181120
 * <br>修改备注：无
 *   String token = request.getParameter("token");// 获取用户表单中提交的
    String pageToken = (String) request.getSession().getAttribute("token");
    if (token.equals(pageToken)) {
       // 令牌只能使用一次
       request.getSession().removeAttribute("token");
       //..业务处理
    } else {
      System.err.println("不能重复提交");
    }
 * <br>版本：1.0.0
 */
public class TokenTag extends TagSupport {
   @Override
   public int doStartTag() throws JspException {
      String uuid = UUID.randomUUID().toString().replace("-", "");
      pageContext.getSession().setAttribute("token", uuid);
      // 向页面上输出
      JspWriter out = pageContext.getOut();
      try {
         String html = "<input type='hidden' value='" + uuid + "' name='token'/>";
         out.print(html);
         //out.clear(); 会将该标签之前的内容清除
         out = pageContext.pushBody();
      } catch (Exception e) {
         e.printStackTrace();
      }finally {
         try {
            out.close();
         } catch (IOException e) {
            e.printStackTrace();
         }
      }
      return EVAL_BODY_INCLUDE;
   }
}

stm.tld

<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
   version="2.1">
   <!-- 标签的版本 -->
   <tlib-version>1.0</tlib-version>
   <!-- 声明标签的名称 -->
   <short-name>stm</short-name>
   <!-- 声明标签的引用方式标识符号 -->
   <uri>/stm.com</uri>
   <!-- 声明自己的标签 -->
   <tag>
      <name>token</name>
      <tag-class>com.hhwy.tag.TokenTag</tag-class>
      <body-content>JSP</body-content>
   </tag>
</taglib>

jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib prefix="token" uri="/stm.com" %>
<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title></title>
    <%@ include file="../gen/common/header.html" %>
    <!--时间控件-->
    <%@ include file="../common/form.jsp" %>
</head>
<body class="white-bg">
<div class="wrapper wrapper-content animated fadeInRight ibox-content">
    <form class="form-horizontal m" id="form-tProjectItemMaintenance-add">
        <token:token></token:token>
        <div class="form-group">
            <label class="col-sm-3 control-label">科目代码：</label>
            <div class="col-sm-8">
                <input id="itemCode" name="itemCode" class="form-control" type="text">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-3 control-label">科目名称：</label>
            <div class="col-sm-8">
                <input id="itemName" name="itemName" class="form-control" type="text">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-3 control-label">排序：</label>
            <div class="col-sm-8">
                <input id="sort" name="sort" class="form-control" type="number" min="0" max="999">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-3 control-label">备注：</label>
            <div class="col-sm-8">
                <textarea id="remark" name="remark" class="form-control" type="text"></textarea>
            </div>
        </div>
    </form>
</div>
</body>
</html>

java

@RequestMapping(value = "/add", method = RequestMethod.POST)
@ResponseBody
public AjaxResult addSave(HttpServletRequest request, TProjectItemMaintenance tProjectItemMaintenance) {
    String token = request.getParameter("token");// 获取用户表单中提交的token
    String pageToken = (String) request.getSession().getAttribute("token");
    if (token.equals(pageToken)) {
        // 令牌只能使用一次
        request.getSession().removeAttribute("token");
        //..业务处理
        return toAjax(tProjectItemMaintenanceService.insertTProjectItemMaintenance(tProjectItemMaintenance));
    } else {
        return AjaxResult.error("不能重复提交");
    }

}

转载于:https://my.oschina.net/u/2351011/blog/2878916