httpclient模拟登陆微博问题

我用httpclient模拟登陆微博报如下错误：

[DEBUG] RequestAddCookies - Cookie [version: 0][name: USRHAWB][value: usrmdins212_186][domain: weibo.com][path: /][expiry: null] match [weibo.com:80/login.php]

[DEBUG] RequestAddCookies - Cookie [version: 0][name: USRHAJAWB][value: usrmdins13148][domain: weibo.com][path: /][expiry: null] match [weibo.com:80/login.php]

我的代码：

import java.io.UnsupportedEncodingException;  
import java.net.URLEncoder;  
import java.util.ArrayList;  
import java.util.Date;  
import java.util.List;  
 
import org.apache.commons.codec.binary.Base64;  
import org.apache.http.HttpResponse;  
import org.apache.http.NameValuePair;  
 
import org.apache.http.client.entity.UrlEncodedFormEntity;  
import org.apache.http.client.methods.HttpGet;  
import org.apache.http.client.methods.HttpPost;  
import org.apache.http.client.params.CookiePolicy;  
import org.apache.http.impl.client.DefaultHttpClient;  
 
import org.apache.http.message.BasicNameValuePair;  
 
import org.apache.http.params.HttpConnectionParams;  
import org.apache.http.protocol.HTTP;  
import org.apache.http.util.EntityUtils;  
 
public class Sina {  
 
    /**
     * @param args
     */  
    public static void main(String[] args) {  
        DefaultHttpClient client = new DefaultHttpClient();  
        client.getParams().setParameter("http.protocol.cookie-policy",  
                CookiePolicy.BROWSER_COMPATIBILITY);  
        client.getParams().setParameter(  
                HttpConnectionParams.CONNECTION_TIMEOUT, 5000);  
        try {  
            HttpPost post = new HttpPost(  
                    "http://login.sina.com.cn/sso/login.php?client=ssologin.js(v1.3.19)");  
            //新加
            post.setHeader("User-Agent","Mozilla/5.0 (X11;Linux i686;rv:5.0) Gecko/20100101 firefox/5.0");
            post.setHeader("Referer","htpp://weibo.com");
            post.setHeader("Content-Type","application/x-www-form-urlencoded");
 
            String data = getServerTime();  
 
            String nonce = makeNonce(6);  
 
            List nvps = new ArrayList();  
            nvps.add(new BasicNameValuePair("entry", "weibo"));  
            nvps.add(new BasicNameValuePair("gateway", "1"));  
            nvps.add(new BasicNameValuePair("from", ""));  
            nvps.add(new BasicNameValuePair("savestate", "7"));  
            nvps.add(new BasicNameValuePair("useticket", "1"));  
            nvps.add(new BasicNameValuePair("ssosimplelogin", "1"));  
            nvps.add(new BasicNameValuePair("su",  
                    encodeAccount("***@sina.com")));  //用户名
            nvps.add(new BasicNameValuePair("service", "miniblog"));  
            nvps.add(new BasicNameValuePair("servertime", data));  
            nvps.add(new BasicNameValuePair("nonce", nonce));  
            nvps.add(new BasicNameValuePair("pwencode", "wsse"));  
            nvps.add(new BasicNameValuePair("sp", new SinaSSOEncoder().encode(  
                    "****", data, nonce)));//密码
 
            nvps.add(new BasicNameValuePair(  
                            "url",  
                            "http://weibo.com/ajaxlogin.php?framelogin=1&callback=parent.sinaSSOController.feedBackUrlCallBack"));  
            nvps.add(new BasicNameValuePair("returntype", "META"));  
            nvps.add(new BasicNameValuePair("encoding", "UTF-8"));  
            nvps.add(new BasicNameValuePair("vsnval", ""));  
 
            post.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));  
            
            HttpResponse response = client.execute(post);  
            String entity = EntityUtils.toString(response.getEntity());  
            //http://weibo.com/ajaxlogin.php?framelogin=1&callback=parent.sinaSSOController.feedBackUrlCallBack&retcode=2092&reason=%B1%A7%C7%B8%A3%A1%B5%C7%C2%BC%CA%A7%B0%DC%A3%AC%C7%EB%C9%D4%BA%F2%D4%D9%CA%D4'"
            String url = entity.substring(entity  
                    .indexOf("http://weibo.com/ajaxlogin.php?"), entity  
                    .indexOf(";\"/>"));  
            System.out.println("aaaaaaaaaaaaaaaa::" + url);
            // 获取到实际url进行连接  
            HttpGet getMethod = new HttpGet(url);  
 
            response = client.execute(getMethod);  
            entity = EntityUtils.toString(response.getEntity());  
            entity = entity.substring(entity.indexOf("userdomain") + 13, entity  
                    .lastIndexOf("\""));  

 
            getMethod = new HttpGet("http://weibo.com/u/2801870824?topnav=1");  
            response = client.execute(getMethod);  
            entity = EntityUtils.toString(response.getEntity());  
            // Document doc =  
            // Jsoup.parse(EntityUtils.toString(response.getEntity()));  
            //System.out.println(entity);  
 
        } catch (Exception e) {  
            // TODO: handle exception  
        }  
    }  
 
    private static String encodeAccount(String account) {  
        String userName = "";  
        try {  
            userName = Base64.encodeBase64(URLEncoder.encode(account, "UTF-8").getBytes()).toString();  
        } catch (UnsupportedEncodingException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
        return userName;  
    }  
 
    private static String makeNonce(int len) {  
        String x = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";  
        String str = "";  
        for (int i = 0; i < len; i++) {  
            str += x.charAt((int) (Math.ceil(Math.random() * 1000000) % x  
                    .length()));  
        }  
        return str;  
    }  
 
    private static String getServerTime() {  
        long servertime = new Date().getTime() / 1000;  
        return String.valueOf(servertime);  
    }  
} 

请高手指点下！