일반 HttpURLConnection을 사용하여 웹 페이지 액세스하기 (두번째)

import java.io.File;   
import java.io.FileOutputStream;   
import java.io.IOException;   
import java.io.InputStream;   
import java.net.MalformedURLException;   
import java.net.URL;   
import java.net.URLConnection;   
public class RequestTest {   
  private static URLConnection connection;   
  private static String saveFile = "D:Info.xls";   
  private static String url = "http://localhost:8080/FileDownloadTest/DownloadTest";   
  private static String uid = "down";   
  private static String pass = "test";   
  private static String compId = "103111";   
  private static void connect(String urlString) {   
    try {   
      URL url = new URL("urlString);   
      connection = url.openConnection();   
    } catch (MalformedURLException e) {   
      e.printStackTrace();   
    } catch (IOException e) {   
      e.printStackTrace();   
    }   
  }   
  private static void readContents() throws IOException {   
    FileOutputStream fileoutput = new FileOutputStream(new File(saveFile));   
    try {   
      InputStream input = connection.getInputStream();   
      byte[] buf = new byte[1024];   
      int length = 0;   
      while ((length = input.read(buf)) > 0) {   
        fileoutput.write(buf);   
      }   
      fileoutput.close();   
      input.close();   
    } catch (MalformedURLException mue) {   
      mue.printStackTrace();   
    } catch (IOException ioe) {   
      ioe.printStackTrace();   
    }   
    System.out.println("Program END!!");   
  }   
  public static void main(String[] args) throws IOException {   
    connect(url + "?id=" + uid + "&pass=" + pass + "&compId=" + compId);   
    readContents();   
  }    
}