加载org.json.jar文件
创建输入页面以接收任何文本或数字
创建服务器端页面以处理请求
在web.xml文件中提供条目
table1.html
<html>
<head>
<script>
var request;
function sendInfo()
{
var v=document.vinform.t1.value;
var url="index.jsp?val="+v;
if(window.XMLHttpRequest){
request=new XMLHttpRequest();
}
else if(window.ActiveXObject){
request=new ActiveXObject("Microsoft.XMLHTTP");
}
try
{
request.onreadystatechange=getInfo;
request.open("GET",url,true);
request.send();
}
catch(e)
{
alert("Unable to connect to server");
}
}
function getInfo(){
if(request.readyState==4){
var val=request.responseText;
document.getElementById('amit').innerHTML=val;
}
}
</script>
</head>
<body>
<marquee><h1>This is an example of ajax</h1></marquee>
<form name="vinform">
<input type="text" name="t1">
<input type="button" value="ShowTable" onClick="sendInfo()">
</form>
<span id="amit"> </span>
</body>
</html>
index.jsp
<%
int n=Integer.parseInt(request.getParameter("val"));
for(int i=1;i<=10;i++)
out.print(i*n+"<br>");
%>
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>table1.html</welcome-file>
</welcome-file-list>
</web-app>