Ajax 捕页面
日期：2014-05-16 浏览次数：20474 次
Ajax 抓页面
<html>
<head>
<title>AJAX.html</title>
</head>
<script type="text/javascript">
/*通过异步传输XMLHTTP发送参数到ajaxServlet，返回符合条件的XML文档*/
function getResult(){
var url = "ajaxServlet?action=send";
if (window.XMLHttpRequest){
req = new XMLHttpRequest();
}else if (window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
}
if(req)
{
req.open("GET",url, true);
req.onreadystatechange = complete;
req.send(null);
}
}
/*分析返回的XML文档*/
function complete(){
if (req.readyState == 4)
{
if (req.status == 200){
//也可以用var date=req.responseText;直接取得服务器端的输出
//通过标签的方式取值
var type = req.responseXML.getElementsByTagName("type_name");
var str=new Array();
for(var i=0;i<type.length;i++){
str[i]=type[i].firstChild.data;
document.all['td'].innerHTML+=str[i]+"<BR>";
}
}
}
}
</script>
<body onLoad="getResult()">
<table width="80%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td id="td">
</td>
</tr>
</table>
</body>
</html>
---------------------------------ajaxServlet.java-----------------------------------------------------
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ajaxServlet extends HttpServlet{
private static final String CONTENT_TYPE = "text/xml; charset=gb2312";
public void init() throws ServletException{}
public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
String action = request.getParameter("action");
if (("send").equals(action))
{
StringBuffer sb = new StringBuffer("<type>");
sb.append("<type_name>AA</type_name>");
sb.append("<type_name>BB</type_name>");
sb.append("<type_name>CC</type_name>");
sb.append("<type_name>DD</type_name>");
sb.append("</type>");
out.write(sb.toString());
out.close();
}
}
}
引用
<html>
<head>
<title>AJAX.html</title>
</head>
<script type="text/javascript">
/*通过异步传输XMLHTTP发送参数到ajaxServlet，返回符合条件的XML文档*/
function getResult(){
var url = "ajaxServlet?action=send";
if (window.XMLHttpRequest){
req = new XMLHttpRequest();
}else if (window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
}
if(req)
{
req.open("GET",url, true);
req.onreadystatechange = complete;
req.send(null);
}
}
/*分析返回的XML文档*/
function complete(){
if (req.readyState == 4)
{
if (req.status == 200){
//也可以用var date=req.responseText;直接取得服务器端的输出
//通过标签的方式取值
var type = req.responseXML.getElementsByTagName("type_name");
var str=new Array();
for(var i=0;i<type.length;i++){
str[i]=type[i].firstChild.data;
document.all['td'].innerHTML+=str[i]+"<BR>";
}
}
}
}
</script>
<body onLoad="getResult()">
<table width="80%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td id="td">
</td>
</tr>
</table>
</body>
</html>
---------------------------------ajaxServlet.java-----------------------------------------------------
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ajaxServlet extends HttpServlet{
private static final String CONTENT_TYPE = "text/xml; charset=gb2312";
public void init() throws ServletException{}
public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
String action = request.getParameter("action");
if (("send").equals(action))
{
StringBuffer sb = new StringBuffer("<type>");
sb.append("<type_name>AA</type_name>");
sb.append("<type_name>BB</type_name>");
sb.append("<type_name>CC</type_name>");
sb.append("<type_name>DD</type_name>");
sb.append("</type>");
out.write(sb.toString());
out.close();
}
}
}
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