java代理请求http（实例）

来源：互联网发布：金融软件融美科技编辑：程序博客网时间：2024/06/05 15:42

import java.io.BufferedInputStream;
import java.net.URL;
import java.net.URLConnection;
public class TestProxyIp {
public static void main(String args[]){
System.getProperties().setProperty("http.proxyHost", "58.83.224.217");
System.getProperties().setProperty("http.proxyPort", "8080");
System.out.println(getHtml("http://iframe.ip138.com/city.asp")); //判断代理是否设置成功
}

private static String getHtml(String address){
StringBuffer html = new StringBuffer();
String result = null;
try{
URL url = new URL(address);
URLConnection conn = url.openConnection();
conn.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; GTB5; .NET CLR 2.0.50727; CIBA)");
BufferedInputStream in = new BufferedInputStream(conn.getInputStream());
try {
String inputLine;
byte[] buf = new byte[4096];
int bytesRead = 0;
while (bytesRead >= 0) {
inputLine = new String(buf, 0, bytesRead, "ISO-8859-1");
html.append(inputLine);
bytesRead = in.read(buf);
inputLine = null;
}
buf = null;
} finally {
in.close();
conn = null;
url = null;
}
result = new String(html.toString().trim().getBytes("ISO-8859-1"), "gb2312").toLowerCase();
}catch(Exception e){
e.printStackTrace();
return null;
}
html = null;
return result;
}

}

运行结果：

<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<title> 您的ip地址 </title>
</head>
<body style="margin:0px"><center>您的ip是：[58.83.224.217] 来自：北京市世纪互联</center></body></html>