结合DWR获取远程URL数据 博客分类： jsp DWRJavaBeanJSPXML
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2024-03-16 08:26:34
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bean.java
package com.cw.entity;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class Bean {
private String[] citys = new String[] { "杭州", "上海", "香港", "武汉", "南京" };
public String[] getCitys() {
return this.citys;
}
public String sendPost(String url) {
String result = "";
try {
URL httpurl = new URL(url);
HttpURLConnection httpConn = (HttpURLConnection) httpurl
.openConnection();
httpConn.setDoInput(true);
BufferedReader in = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
in.close();
} catch (Exception e) {
e.printStackTrace();
System.out.println("没有结果！" + e);
}
return result;
}
}
index.jsp
<%@ page language="java" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="dwr/interface/bean.js"></script>
<script type="text/javascript" src="dwr/engine.js"></script>
<script type="text/javascript" src="dwr/util.js"></script>
<style type="text/css">
.tips-loading {
PADDING-RIGHT: 3px; PADDING-LEFT: 3px; BACKGROUND: url(img/reg0.gif) lightyellow no-repeat 3px center; PADDING-BOTTOM: 1px; OVERFLOW: hidden; WIDTH: 300px; COLOR: #808080; TEXT-INDENT: 20px; LINE-HEIGHT: 16px; PADDING-TOP: 2px
}
.tips-pass {
BACKGROUND: url(img/reg4.gif) #e9ffeb no-repeat 0px -2px; COLOR: #333
}
</style>
</head>
<body>
<div
style="position:absolute; left: 14px; top: 49px; width: 968px; height: 70px; background:#CCCCCC">
<label style="position:absolute; left: 52px; top: 22px;">
<input type="text" name="url" size="50" value="http://www.baidu.com">
</label>
<label
style="position:absolute; left: 422px; top: 21px; width: 140px;">
<input name="Input" type="submit" value="获取内容" onClick="getData()">
</label>
<div id="status" style="position:absolute; width:278px; left: 501px; top: 24px; height: 20px; background-color:#CCCC99"></div>
</div>
<p>
</p>
<textarea
style="position: absolute; left: 13px; top: 125px; width: 968px; height: 419px;"
id="showresult"></textarea>
<script type="text/javascript">
function $(id){
return document.getElementById(id);
}
function getData(){
$("status").className="tips-loading";
$("status").innerHTML=" 正在读取数据...";
bean.sendPost(dwr.util.getValue("url"),function(data){
$("showresult").value=data;
$("status").className="tips-pass";
$("status").innerHTML=" 读取完毕!";
});
}
</script>
</body>
</html>
dwr.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd"> <dwr> <allow> <create creator="new" javascript="bean"> <param name="class" value="com.cw.entity.Bean" /> <include method="getCitys" /> <include method="sendPost"/> </create> </allow> </dwr>
web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <servlet> <servlet-name>dwr-invoker</servlet-name> <!-- <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>--> <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class> <init-param> <param-name>debug</param-name> <param-value>false</param-value> </init-param> <init-param> <param-name>activeReverseAjaxEnabled</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name> initApplicationScopeCreatorsAtStartup </param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>maxWaitAfterWrite</param-name> <param-value>500</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dwr-invoker</servlet-name> <url-pattern>/dwr/*</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>