高分求解,使用httpclient登陆论坛,急,在线等...

主 题：  求助,apache.commons.?  
   
我想登陆我的论坛,用程序采集论坛信息,研究了几天,怎么也登陆不了,请高手指点了,谢谢!  
 
以下是我的代码:  
 
package  com.getemail;  
 
import  org.apache.commons.httpclient.HttpClient;  
import  org.apache.commons.httpclient.methods.PostMethod;  
import  org.apache.commons.httpclient.HttpStatus;  
import  org.apache.commons.httpclient.Header;  
import  org.apache.commons.httpclient.NameValuePair;  
 
public  class  BbsUp  {  
   public  static  void  main(String[]  args)  {  
       HttpClient  httpClient  =  new  HttpClient();  
       String  loginUrl  =  "http://bbs.shanbeiren.com/logging.php?action=login";//登陆url  
       try{  
               //登陆  
               PostMethod  postMethod=new  PostMethod(loginUrl);  
                 
                       //登陆页面表单  
               NameValuePair  formhash  =  new  NameValuePair("formhash",  "6a49b97f");  
               NameValuePair  referer  =  new  NameValuePair("referer",  
                                                                                                   "/viewpro.php?username=www");  
               NameValuePair  loginmode  =  new  NameValuePair("loginmode",  "normal");  
               NameValuePair  styleid  =  new  NameValuePair("styleid",  "1");  
               NameValuePair  cookietime  =  new  NameValuePair("cookietime",  "2592000");  
               NameValuePair  loginfield  =  new  NameValuePair("loginfield",  "username");  
               NameValuePair  username  =  new  NameValuePair("username",  "www");  
               NameValuePair  password  =  new  NameValuePair("password",  "40964096");  
               NameValuePair  questionid  =  new  NameValuePair("questionid",  "0");  
               NameValuePair  answer  =  new  NameValuePair("answer",  "");  
 
               postMethod.setRequestBody(new  NameValuePair[]  {loginmode,styleid,loginfield,username,  password,  formhash,  referer,  
                                                       cookietime,questionid,answer});  
 
                       //打印返回状态  
               int  statusCode=httpClient.executeMethod(postMethod);  
               System.out.println(statusCode);  
                       //打印返回的信息  
               String  response  =  null;  
               response  =  new  String(postMethod.getResponseBodyAsString().getBytes("8859_1"));  //打印结果页面  
               System.out.println(response);    
 
               postMethod.releaseConnection();  
                 
       }catch(Exception  err){  
               System.out.println(err.getMessage());  
       }  
   }  
}