ajaxTest.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'ajaxTest.jsp' starting page</title>
<script type="text/javascript" src="ajaxTest.js"></script>
</head>
<body>
enter :
<input type="text" name="sth" id="sth" />
<input type="button" value="查看输入的内容" onclick="myRequest()"/>
<br />
<label id="out"></label>
</body>
</html>
ajaxTest.js
var http_request = false;
function sendRequest(method,url,content,responseType,callback) {
http_request = false;
if (window.XMLHttpRequest) {
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
http_request.overrideMimeType("text/xml");
}
} else {
if (window.ActiveXObject) {
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e) {
}
}
}
}
if (!http_request) {
window.alert("\不\能\创\建XMLHttpRequest\对\象\实\例");
return false;
}
if (responseType.toLowerCase() == "text") {
http_request.onreadystatechange = callback;
} else {
if (responseType.toLowerCase() == "xml") {
http_request.onreadystatechange = callback;
} else {
window.alert("\相\应\参\数\类\别\错\误");
return false;
}
}
if (method.toLowerCase() == "get") {
http_request.open(method,true);
} else {
if (method.toLowerCase() == "post") {
http_request.open(method,true);
http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
} else {
window.alert("http\请\求\类\别\参\数\错\误");
return false;
}
}
http_request.send(content);
}
function processResponse() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
var msg = document.getElementById("out");
if (msg != undefined) {
msg.innerText = http_request.responseText;
}
} else {
alert("\您\所\请\求\的\页\面\有\异\常");
}
}
}
function myRequest(path) {
var name;
if (document.getElementById("sth")!= undefined) {
name = document.getElementById("sth").value;
}
var url = "servlet/AjaxTest?time=" + Math.random();
var content = "sth=" + name;
sendRequest("POST","TEXT",processResponse);
}
servlet
package com.bonree.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class AjaxTest extends HttpServlet {
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException {
this.doPost(request,response);
}
public void doPost(HttpServletRequest request,IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
request.setCharacterEncoding("utf-8");
String name = request.getParameter("sth");
response.getWriter().write("输入的内容为：" + name);
}
}
