Source Code : Call a servlet from a Java command line application

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Call a servlet from a Java command line application

       
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.URL;
import java.net.URLConnection;

public class CounterApp {

  public static void main(String args[])throws Exception {
    String sessionCookie = null;
    URL url = new java.net.URL("http://127.0.0.1/yourServlet");
    URLConnection con = url.openConnection();
    if (sessionCookie != null) {
      con.setRequestProperty("cookie", sessionCookie);
    }
    con.setUseCaches(false);
    con.setDoOutput(true);
    con.setDoInput(true);
    ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
    DataOutputStream out = new DataOutputStream(byteOut);
    out.flush();
    byte buf[] = byteOut.toByteArray();
    con.setRequestProperty("Content-type", "application/octet-stream");
    con.setRequestProperty("Content-length", "" + buf.length);
    DataOutputStream dataOut = new DataOutputStream(con.getOutputStream());
    dataOut.write(buf);
    dataOut.flush();
    dataOut.close();
    DataInputStream in = new DataInputStream(con.getInputStream());
    int count = in.readInt();
    in.close();
    if (sessionCookie == null) {
      String cookie = con.getHeaderField("set-cookie");
      if (cookie != null) {
        sessionCookie = parseCookie(cookie);
        System.out.println("Setting session ID=" + sessionCookie);
      }
    }

    System.out.println(count);
  }

  public static String parseCookie(String raw) {
    String c = raw;

    if (raw != null) {
      int endIndex = raw.indexOf(";");
      if (endIndex >= 0) {
        c = raw.substring(0, endIndex);
      }
    }
    return c;
  }
}

   
    
    
    
    
    
  

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