📄 index.jsp
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<%@ page language="java" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Sending Request Data Using GET and POST</title>
<script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest() {
if (window.ActiveXObject) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest) {
xmlHttp = new XMLHttpRequest();
}
}
function createQueryString() {
var firstName = document.getElementById("firstName").value;
var middleName = document.getElementById("middleName").value;
var birthday = document.getElementById("birthday").value;
var queryString = "firstName=" + firstName + "&middleName=" + middleName
+ "&birthday=" + birthday;
return queryString;
}
function doRequestUsingGET() {
createXMLHttpRequest();
var queryString = "serverServlet.do?";
queryString = queryString + createQueryString()
+ "&timeStamp=" + new Date().getTime();
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.open("GET", queryString, true);
xmlHttp.send(null);
}
function doRequestUsingPOST() {
createXMLHttpRequest();
var url = "serverServlet.do?timeStamp=" + new Date().getTime();
var queryString = createQueryString();
xmlHttp.open("POST", url, true);
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xmlHttp.send(queryString);
}
function handleStateChange() {
if(xmlHttp.readyState == 4) {
if(xmlHttp.status == 200) {
parseResults();
}
}
}
function parseResults() {
var responseDiv = document.getElementById("serverResponse");
if(responseDiv.hasChildNodes()) {
responseDiv.removeChild(responseDiv.childNodes[0]);
}
var responseText = document.createTextNode(xmlHttp.responseText);
responseDiv.appendChild(responseText);
}
</script>
</head>
<body>
<h1>请输入您的姓, 名, 生日:</h1>
<table>
<tbody>
<tr>
<td>姓:</td>
<td><input type="text" id="firstName"/>
</tr>
<tr>
<td>名字:</td>
<td><input type="text" id="middleName"/>
</tr>
<tr>
<td>生日:</td>
<td><input type="text" id="birthday"/>
</tr>
</tbody>
</table>
<form action="#">
<input type="button" value="GET请求" onclick="doRequestUsingGET()"/>
<br/><br/>
<input type="button" value="POST请求" onclick="doRequestUsingPOST()"/>
</form>
<br/>
<h2>服务器响应:</h2>
<div id="serverResponse"></div>
</body>
</html>
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