Ajax技术--实时显示公告信息（$.get()）

最新推荐文章于 2024-12-18 17:33:28 发布

柏油

最新推荐文章于 2024-12-18 17:33:28 发布

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分类专栏： # JAVA WEB

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本文介绍了一个使用JSP技术实现页面内容定时刷新的例子。通过index.jsp与display.jsp两个页面交互，利用jQuery发送AJAX请求获取后台数据并更新DOM元素内容。此方案适用于公告滚动等场景。

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1、index.jsp页面：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
	
	<script type="text/javascript" src = "js/jquery-3.1.1.min.js"></script>
	<script type="text/javascript">
	  function show(){
	  $.get("display.jsp?nocache="+new Date().getTime(),function(data){
	  $("#div1").html(data);
	  });
	  }
	  
	  $(document).ready(function(){
	    show();
	    setInterval("show()",5000);
	  });
	</script>
  </head>
  
  <body>
    <marquee direction="up" scrollamount="3" style= "height:300px">
       <div id = "div1" style="background: grey;height:100px ;width:200px"></div>
    </marquee>
  </body>
</html>

2、display.jsp页面：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<%
  String []msg = {"高考进行中","端午放假通知","今明两天气温升高","明天休假"};
  
  for(int i = 0; i < msg.length; i++){
    out.println("<li>"+ msg[i] +"</li>");
  }
 %>