java网络代理
import java.io.IOException;
import java.io.InputStream;
import .InetSocketAddress;
import .MalformedURLException;
import .Proxy;
import .ProxySelector;
import .SocketAddress;
import .URI;
import .URISyntaxException;
import .URL;
import .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("");
}
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://");
}
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));
}
}