JSP+AJAX 不错的例子

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一、发送请求的html文件

html:

<html><head><title>ajax+jsp域名查询</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><mce:script language="javascript"></mce:script></head><body bgColor=#cccca3>请输入域名名称：<input type="text" value="cctv.com" id="words" name="words" size="69"><input type="submit" value="查询" id=Submit1 name=Submit1 onClick="sendRequest() "><TEXTAREA id="comments" name="comments" readonly rows=15 cols=76>

二、处理ajax请求的jsp文件：

domainQuery1.jsp

<%@ page import="java.io.*" %><%@ page import="java.util.*" %> <%@ page import="java.net.HttpURLConnection" %><%@ page import="java.net.URL" %><%@ page import="org.jdom.Document" %><%@ page import="org.jdom.Element" %><%@ page import="org.jdom.input.*" %><%@ page contentType="text/html; charset=gb2312" %><% //设置输出信息的格式及字符集 response.setContentType("text/html; charset=gb2312"); response.setHeader("Cache-Control","no-cache"); String param =request.getParameter("words"); String domainmsg=null; URL url = null; BufferedReader in = null; InputStreamReader isr = null; InputStream is = null; HttpURLConnection huc = null; try { url = new URL("http://now.net.cn/domain/domaincheck.php?query="+param); huc = (HttpURLConnection)url.openConnection(); is = huc.getInputStream(); isr = new InputStreamReader(is); in = new BufferedReader(isr); String line = null; StringBuffer s = new StringBuffer(333); while((line = in.readLine()) != null) { line=line.trim(); s.append(line); } domainmsg=s.toString(); SAXBuilder builder = new SAXBuilder(); Document doc = null; Reader in1= new StringReader(domainmsg); doc = builder.build(in1); Element root = doc.getRootElement(); String ss=root.getChild("result").getChildText("msg"); out.print(ss); }catch(Exception e){ e.printStackTrace(); } finally { try { huc.disconnect(); is.close(); isr.close(); in.close(); } catch(Exception e) { e.printStackTrace(); } } out.close();%>