在JAVA代码中设置代理使用代理服务器

import java.net.*;
import java.io.*;

public class URLReader {
	public static void main(String[] args) throws Exception {
		// Configure proxy ...
		System.setProperty("http.proxySet", "true");
		System.setProperty("http.proxyHost", "proxy.nnnsssfff.com");
		System.setProperty("http.proxyPort", "8080");
		System.setProperty("http.proxyType", "4");
		String proxyUser = "lv.hq", proxyPassword = "自己的密码！！！！！！！！！！！";

		// Open URL ...
		URL url = new URL("http://www.google.com/");
		URLConnection con = url.openConnection();

		// proxy user and pass
		con.setRequestProperty("Proxy-Authorization", "Basic "
				+ new sun.misc.BASE64Encoder()
						.encode((proxyUser + ":" + proxyPassword).getBytes()));

		BufferedReader in = new BufferedReader(new InputStreamReader(con
				.getInputStream()));

		// Read it ...
		String inputLine;
		while ((inputLine = in.readLine()) != null)
			System.out.println(inputLine);

		in.close();
	}
}