how to get the content output from another servlet?

You should to forward the request to the the second servlet once the first servlet is done with its processing.

i found the solution.
how to read directory from URL
import java.net.*;
import java.io.*;

public class URLReader {
    public static void main(String[] args) throws Exception {
      URL yahoo = new URL("http://www.yahoo.com/");
      BufferedReader in = new BufferedReader(
                        new InputStreamReader(
                        yahoo.openStream()));

      String inputLine;

      while ((inputLine = in.readLine()) != null)
          System.out.println(inputLine);

      in.close();
    }
}