JSP控制表单重复提交

最新推荐文章于 2021-11-20 10:50:47 发布

原创最新推荐文章于 2021-11-20 10:50:47 发布 · 364 阅读

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本文介绍了一种通过UUID和session管理来防止Web应用中表单重复提交的方法。具体实现包括为每次表单提交生成唯一的请求标识符，并在服务器端验证该标识符的有效性和唯一性，确保同一表单不会被多次提交。

    <form action="<%=basePath %>xxx.do">
    	<input type="hidden" name="reqUUID" value="<%= UUID.randomUUID().toString() %>" />
    </form>

String reqUUID = request.getParameter("reqUUID");
String sessionUUID = null;
try {
	sessionUUID = request.getSession().getAttribute("sessionUUID").toString();
} catch (Exception e) {
	sessionUUID = null;
}				
if(reqUUID!=null){
	if(sessionUUID!=null && sessionUUID.equals(requestUUID)){//重复提交表单
		List list = request.getSession().getAttribute(sessionUUID);
		request.setAttribute("dataList",list);
		request.getRequestDispatcher("view.jsp").forward(request, response);	
	}else{							//正常提交表单
		List list = null;
		//业务处理

		request.getSession().setAttribute("sessionUUID", requestUUIDKey);
		request.getSession().setAttribute(reqUUID, list);	
		request.setAttribute("dataList",list);
		request.getRequestDispatcher("view.jsp").forward(request, response);
	}	
}else{
	
	if(sessionUUIDKey!=null){//页面刷新
		List list = request.getSession().getAttribute(sessionUUID);
		request.setAttribute("dataList",list);
		request.getRequestDispatcher("view.jsp").forward(request, response);
	}else{					//session 失效
		response.sendRedirect(request.getContextPath()+"index.jsp");
	}
	
}