import java.net.MalformedURLException;
import java.net.URL;
public class URLDemo {
  public static void main(String[] args) throws MalformedURLException {
    URL url = new URL("http://192.168.0.124:8080/webapp/index.html?name=lisi");
    int port = url.getPort();
    String host = url.getHost();
    String uri_path = url.getPath();
    String request_file = url.getFile();
    String query = url.getQuery();
    System.out.println("host: "+ host);
    System.out.println("port: "+ port);
    System.out.println("uri_path: "+ uri_path);
    System.out.println("request_file: "+ request_file);
    System.out.println("query: "+ query);
  }
}

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

public class URLConnectionDemo {
  public static void main(String[] args) {
    try {
      URL url = new URL("https://www.baidu.com/");
      URLConnection urlc = url.openConnection();
      System.out.println(urlc.getURL()); //解析http響應(yīng)報(bào)文
      InputStream is = urlc.getInputStream();
      byte[] buf = new byte[1024];
      int len = 0;
      while((len=is.read(buf))!=-1) {
        System.out.println(new String(buf,0,len));
      }
    } catch (MalformedURLException e1) {
      // TODO Auto-generated catch block
      e1.printStackTrace();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
}