J2SE5.0新特性之使用代理服务器

package com.kuaff.jdk5package;

import java.io.IOException;

import java.io.InputStream;

import java.net.InetSocketAddress;

import java.net.MalformedURLException;

import java.net.Proxy;

import java.net.ProxySelector;

import java.net.SocketAddress;

import java.net.URI;

import java.net.URISyntaxException;

import java.net.URL;

import java.net.URLConnection;

import java.util.List;

import java.util.Properties;

public class NetProxy

{

// 测试本地JVM的网络缺省配置

public void setLocalProxy()

{

Properties prop = System.getProperties();

//设置http访问要使用的代理服务器的地址

prop.setProperty("http.proxyHost", "10.10.0.96");

//设置http访问要使用的代理服务器的端口

prop.setProperty("http.proxyPort", "8080");

//设置不需要通过代理服务器访问的主机，可以使用*通配符，多个地址用|分隔

prop.setProperty("http.nonProxyHosts", "localhost|10.10.*");

//设置安全访问使用的代理服务器地址与端口

//它没有https.nonProxyHosts属性，它按照http.nonProxyHosts 中设置的规则访问

prop.setProperty("https.proxyHost", "10.10.0.96");

prop.setProperty("https.proxyPort", "443");

//使用ftp代理服务器的主机、端口以及不需要使用ftp代理服务器的主机

prop.setProperty("ftp.proxyHost", "10.10.0.96");

prop.setProperty("ftp.proxyPort", "2121");

prop.setProperty("ftp.nonProxyHosts", "localhost|10.10.*");

//socks代理服务器的地址与端口

prop.setProperty("socksProxyHost", "10.10.0.96");

prop.setProperty("socksProxyPort", "1080");

}

// 清除proxy设置

public void removeLocalProxy()

{

Properties prop = System.getProperties();

prop.remove("http.proxyHost");

prop.remove("http.proxyPort");

prop.remove("http.nonProxyHosts");

prop.remove("https.proxyHost");

prop.remove("https.proxyPort");

prop.remove("ftp.proxyHost");

prop.remove("ftp.proxyPort");

prop.remove("ftp.nonProxyHosts");

prop.remove("socksProxyHost");

prop.remove("socksProxyPort");

}

//

// 测试http

public void showHttpProxy(Object... proxy)

{

URL url = null;

try

{

url = new URL("http://blog.csdn.com/smallnest");

}

catch (MalformedURLException e)

{

return;

}

try

{

URLConnection conn = null;

switch (proxy.length)

{

case 0:

conn = url.openConnection();

break;

case 1:

conn = url.openConnection((Proxy) proxy[0]);

break;

default:

break;

}

if (conn == null)

return;

conn.setConnectTimeout(3000); // 设置连接超时时间

InputStream in = conn.getInputStream();

byte[] b = new byte[1024];

try

{

while (in.read(b) > 0)

{

System.out.println(new String(b));

}

}

catch (IOException e1)

{

}

}

catch (IOException e1)

{

e1.printStackTrace();

}

}

// 测试ftp

public void showFtpProxy(Object... proxy)

{

URL url = null;

try

{

url = new URL("ftp://ftp.tsinghua.edu.cn");

}

catch (MalformedURLException e)

{

return;

}

try

{

URLConnection conn = null;

switch (proxy.length)

{

case 0:

conn = url.openConnection();

break;

case 1:

conn = url.openConnection((Proxy) proxy[0]);

break;

default:

break;

}

if (conn == null)

return;

conn.setConnectTimeout(3000); // 设置连接超时时间

InputStream in = conn.getInputStream();

byte[] b = new byte[1024];

try

{

while (in.read(b) > 0)

{

System.out.println(new String(b));

}

}

catch (IOException e1)

{

}

}

catch (IOException e1)

{

e1.printStackTrace();

}

}

// 得到一个proxy

public Proxy getProxy(Proxy.Type type, String host, int port)

{

SocketAddress addr = new InetSocketAddress(host,port);

Proxy typeProxy = new Proxy(type, addr);

return typeProxy;

}

public static void main(String[] args)

{

NetProxy proxy = new NetProxy();

//测试代理服务器

proxy.setLocalProxy();

proxy.showHttpProxy();

//下面两行是清除系统属性，而通过Proxy类指定代理服务器

// proxy.removeLocalProxy

//proxy.showHttpProxy(proxy.getProxy(Proxy.Type.SOCKS,"10.10.0.96",1080));

}

}