HttpClient client = new HttpClient();
        
        
        PostMethod method = new PostMethod("http://www.xxxx.com/app/user" );
        
        method.addParameter("email", "xxxxxx@gmail.com" );
        method.addParameter("password", "xxxxxxx" );
        
        try {
              // Execute the method.
              int statusCode = client.executeMethod(method);
 
              if (statusCode != HttpStatus.SC_OK) {
                System.err.println("Method failed: " + method.getStatusLine());
              }
 
              // Read the response body.
              byte[] responseBody = method.getResponseBody();
 
              // Deal with the response.
              // Use caution: ensure correct character encoding and is not binary data
              System.out.println(new String(responseBody));
 
            } catch (HttpException e) {
              System.err.println("Fatal protocol violation: " + e.getMessage());
              e.printStackTrace();
            } catch (IOException e) {
              System.err.println("Fatal transport error: " + e.getMessage());
              e.printStackTrace();
            } finally {
              // Release the connection.
              method.releaseConnection();
            }

1. // Create an instance of HttpClient.
2.  HttpClient client = new HttpClient();
5.  // utilisation du user-agent de firefox
6.  Header header = new Header("User-Agent", "Mozilla/5.0" );
9.  PostMethod method = new PostMethod("https://www.xing.com/app/user" );
11.  method.setRequestHeader(header);
12.  method.addParameter("login_user_name", "xxxxxx@gmail.com" );
13.  method.addParameter("login_password", "xxxxxxx" );
14.  method.addParameter("op", "login" );
15.  method.addParameter("dest", "/app/startpage?op=home;from_login=1" );
16.  method.addParameter("perm", "true" );
18.    
19.  try {
21.   // Execute the method.     
22.   int statusCode = client.executeMethod(method);
25.   if (statusCode != HttpStatus.SC_OK) {
26.    System.err.println("Method failed: " + method.getStatusLine());
28.    // si il y a une redirection on l'utilise
29.    while (statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {
30.     String redirectLocation = "";
32.     //on récupère l'url de la redirection
33.     Header locationHeader = method.getResponseHeader("location" );
34.     if (locationHeader != null) {
35.      redirectLocation = locationHeader.getValue();
36.     }
38.     System.out.println(redirectLocation);
40.     method = new PostMethod(redirectLocation);
41.     method.setRequestHeader(header);
43.     statusCode = client.executeMethod(method);
47.    }
48.   }
51.   System.out.println("-------------------------------------------------------------" );
52.   // Read the response body.
54.   byte[] responseBody = method.getResponseBody();
55.   // Deal with the response.
56.   // Use caution: ensure correct character encoding and is not binary
57.   // data
58.   System.out.println(new String(responseBody));
59.  } catch (HttpException e) {
60.   System.err.println("Fatal protocol violation: " + e.getMessage());
61.   e.printStackTrace();
62.  } catch (IOException e) {
63.   System.err.println("Fatal transport error: " + e.getMessage());
64.   e.printStackTrace();
65.  } finally {
66.   // Release the connection.
67.   //method.releaseConnection();
69.  }