我试图模仿Java中此curl命令的功能：

curl --basic --user username:password -d "" http://ipaddress/test/login

我使用Commons HttpClient 3.0编写了以下内容，但最终还是500 Internal Server Error从服务器上获取了一个。有人可以告诉我我做错了什么吗？

public class HttpBasicAuth {

    private static final String ENCODING = "UTF-8";

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        try {

            HttpClient client = new HttpClient();

            client.getState().setCredentials(
                    new AuthScope("ipaddress", 443, "realm"),
                    new UsernamePasswordCredentials("test1", "test1")
                    );

            PostMethod post = new PostMethod(
                    "http://address/test/login");

            post.setDoAuthentication( true );

            try {
                int status = client.executeMethod( post );
                System.out.println(status + "\n" + post.getResponseBodyAsString());
            } finally {
                // release any connection resources used by the method
                post.releaseConnection();
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
   } 

我后来尝试了Commons HttpClient 4.0.1，但仍然遇到相同的错误：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;


public class HttpBasicAuth {

    private static final String ENCODING = "UTF-8";

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        try {
            DefaultHttpClient httpclient = new DefaultHttpClient();

            httpclient.getCredentialsProvider().setCredentials(
                    new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT), 
                    new UsernamePasswordCredentials("test1", "test1"));

            HttpPost httppost = new HttpPost("http://host:post/test/login");

            System.out.println("executing request " + httppost.getRequestLine());
            HttpResponse response;
            response = httpclient.execute(httppost);
            HttpEntity entity = response.getEntity();

            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());
            if (entity != null) {
                System.out.println("Response content length: " + entity.getContentLength());
            }
            if (entity != null) {
                entity.consumeContent();
            }

            httpclient.getConnectionManager().shutdown();  
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
}