服务器端 timeServer.jsp
<%@ page language="java" contentType="text/html;charset=utf-8" %>
<% //服务器端 //禁止缓村
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires",0); //response.getWriter().write(beginTestTime.toString());
response.getWriter().write("wxj");%>
客户端<%@ page contentType="text/html; charset=gb2312" language="java" %>
<html>
<head> <script language="javascript">
function showTimeBefore(){
window.alert("fdsdf");
var xmlHttp;
if(window.ActiveXObject){
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest){
xmlHttp = new XMLHttpRequest();
}
xmlHttp.open("GET","timeServer.jsp",true);
xmlHttp.onreadystatechange=updateTime;
xmlHttp:send(null);
}
function updateTime()
{
if (xmlHttp.readyState == 4)
if (xmlHttp.readyState == 200)
{
var response=xmlHttp.responseText;
document.getElementById("clock").value= response;
alert("Server is done!");
}
else if (xmlHttp.readyState == 404)
alert("Request URL does not exist");
else
alert("Error:status code is "+xmlHttp.status);
} </script>
</head>
<body>
<form method="get" name="test"><p> </p><p> </p><p>
<input type="text" id="clock" name="clock"></p><p> </p><p> </p><p> </p>
<input type="button" name="button1" onclick="showTimeBefore()">
</form>
</body>
</html>
<%@ page language="java" contentType="text/html;charset=utf-8" %>
<% //服务器端 //禁止缓村
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires",0); //response.getWriter().write(beginTestTime.toString());
response.getWriter().write("wxj");%>
客户端<%@ page contentType="text/html; charset=gb2312" language="java" %>
<html>
<head> <script language="javascript">
function showTimeBefore(){
window.alert("fdsdf");
var xmlHttp;
if(window.ActiveXObject){
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest){
xmlHttp = new XMLHttpRequest();
}
xmlHttp.open("GET","timeServer.jsp",true);
xmlHttp.onreadystatechange=updateTime;
xmlHttp:send(null);
}
function updateTime()
{
if (xmlHttp.readyState == 4)
if (xmlHttp.readyState == 200)
{
var response=xmlHttp.responseText;
document.getElementById("clock").value= response;
alert("Server is done!");
}
else if (xmlHttp.readyState == 404)
alert("Request URL does not exist");
else
alert("Error:status code is "+xmlHttp.status);
} </script>
</head>
<body>
<form method="get" name="test"><p> </p><p> </p><p>
<input type="text" id="clock" name="clock"></p><p> </p><p> </p><p> </p>
<input type="button" name="button1" onclick="showTimeBefore()">
</form>
</body>
</html>
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