HttpClient client = new HttpClient();
client.getState().setCookiePolicy(CookiePolicy.COMPATIBILITY);

// 1
GetMethod authget = new GetMethod("httpwww.sample.comsampleAppsample.rss");
try {
    client.executeMethod(authget);
}
catch (HttpException httpe) {
    httpe.printStackTrace();
}
catch (IOException ioe) {
    ioe.printStackTrace();
}

// 2
NameValuePair[] data = new NameValuePair[2];
data[0] = new NameValuePair("j_username", username);
data[1] = new NameValuePair("j_password", password);

PostMethod authpost = new PostMethod("http://www.sample.com/sampleApp/j_security_check");
authpost.setRequestBody(data);

// 3
Header hCookie = authget.getRequestHeader("Cookie");
Header hHost = authget.getRequestHeader("Host");
Header hUserAgent = authget.getRequestHeader("User-Agent");
if (hCookie == null || hHost == null || hUserAgent == null) {
    return null;
}

authpost.setRequestHeader(hCookie);
authpost.setRequestHeader(hHost);
authpost.setRequestHeader(hUserAgent);

authget.releaseConnection();

try {
    client.executeMethod(authpost);

    // 4
    Header header = authpost.getResponseHeader("location");
    if (header != null) {
        String newuri = header.getValue(); 
        GetMethod redirect = new GetMethod(newuri);

        client.executeMethod(redirect); 
        // process the content from the response
        redirect.releaseConnection();            
    }
} catch (HttpException httpe) {
    httpe.printStackTrace();
    return null;
} catch (IOException ioe) {
    ioe.printStackTrace();
    return null;
}
authpost.releaseConnection();