[Java] Einloggen auf Website

<input name="username" size="15" style="border: 1px outset rgb(0, 0, 50); color: rgb(45, 45, 45); font-size: 7pt; font-family: Verdana; background-color: rgb(244, 244, 244);" value=" Username" onFocus="this.value=''" type="text">
<input name="password" size="15" style="border: 1px outset rgb(0, 0, 50); color: rgb(45, 45, 45); font-size: 7pt; font-family: Verdana; background-color: rgb(244, 244, 244);" value="Passwort" onFocus="this.value=''" type="password">
<img src="index-Dateien/4p_button_pfeil.gif" border="0">
<img src="index-Dateien/4p_button_reg.gif" border="0">

import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.cookie.CookieSpec;
import org.apache.commons.httpclient.methods.*;
import org.apache.commons.httpclient.params.HttpClientParams;

/**
 * 
 * 
 * 
 */
public class test2 {


 public static void main(String[] args) throws Exception {

 HttpClient client = new HttpClient();
 client.getParams().setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
 
 GetMethod authget = new GetMethod("...");

 client.executeMethod(authget);
 System.out.println("Login form get: "
 + authget.getStatusLine().toString());
 // release any connection resources used by the method
 authget.releaseConnection();
 // See if we got any cookies
 Cookie[] initcookies = client.getState().getCookies();
 System.out.println("Initial set of cookies:"); 
 
 if (initcookies.length == 0) {
 System.out.println("None"); 
 } else {
 for (int i = 0; i < initcookies.length; i++) {
 System.out.println("- " + initcookies[i].toString()); 
 }
 }

 PostMethod authpost = new PostMethod("...");

 NameValuePair a = new NameValuePair("username", "...");
 NameValuePair b = new NameValuePair("passwd", "...");
 NameValuePair d = new NameValuePair("target", "...");

 authpost.setRequestBody(new NameValuePair[] { a, b, d });

 
 client.executeMethod(authpost);
 System.out.println("Login form post: "
 + authpost.getStatusLine().toString());

 System.out.println(authpost.getResponseBodyAsString());
 // release any connection resources used by the method
 authpost.releaseConnection();
 
 initcookies = client.getState().getCookies();
 System.out.println("Initial set of cookies:"); 
 if (initcookies.length == 0) {
 System.out.println("None"); 
 } else {
 for (int i = 0; i < initcookies.length; i++) {
 System.out.println("- " + initcookies[i].toString()); 
 }
 }
 
 String redirectLocation = null;
 Header locationHeader = authpost.getResponseHeader("location");
 if (locationHeader != null) {
 redirectLocation = locationHeader.getValue();
 System.out.println("Location:" + redirectLocation);
 } else { // The response is
 // invalid and did not provide the new location for // the resource.
 // Report an error or possibly handle the response // like a 404 Not
 // Found error.
 } //
 

 
 int statuscode = authpost.getStatusCode();
 if ((statuscode == HttpStatus.SC_MOVED_TEMPORARILY)
 || (statuscode == HttpStatus.SC_MOVED_PERMANENTLY)
 || (statuscode == HttpStatus.SC_SEE_OTHER)
 || (statuscode == HttpStatus.SC_TEMPORARY_REDIRECT)) {
 Header header = authpost.getResponseHeader("location");
 if (header != null) {
 String newuri = header.getValue();
 if ((newuri == null) || (newuri.equals(""))) {
 newuri = "/";
 }
 // newuri+="index.php";
 System.out.println("Redirect target: " + newuri);
 GetMethod redirect = new GetMethod(newuri);

 client.executeMethod(redirect);
 // System.out.println(neu.getResponseBodyAsString());
 System.out.println("Redirect: "
 + redirect.getStatusLine().toString());
 // System.out.println(redirect.getResponseBodyAsString());
 // release any connection resources used by the method
 redirect.releaseConnection();
 } else {
 System.out.println("Invalid redirect");
 System.exit(1);
 }
 
 }
 System.out.println(authpost.getResponseBodyAsString());
 }
}