/** 
  * post 
  * @param url POST地址 
  * @param data POST数据NameValuePair[] 
  * @return 响应的参数 
  */  
 public static String post(String url,NameValuePair[] data){---------------get里面没有data只有url  
        
     String response = "";  
        
     HttpClient httpClient = new HttpClient();  
     PostMethod postMethod = new PostMethod(url);  
        
     //设置请求编码  
     postMethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"GBK");  
        
     postMethod.setRequestBody(data);  ---------------------------------get没有这一步--------   
        
     //设置请求头header参数  
     postMethod.setRequestHeader("userId","57601095");  
     postMethod.setRequestHeader("userSession","57601095");  
     postMethod.setRequestHeader("cityid","31000");  
        
     int statusCode = 0;  
        
     try {  
         statusCode = httpClient.executeMethod(postMethod);  
     } catch (HttpException e) {  
         e.printStackTrace();  
     } catch (IOException e) {  
         e.printStackTrace();  
     }  
        
    try {   
          byte[] b=postMethod.getResponseBody();  
          response = new String(b,"GBK");  
     } catch (IOException e) {   
          e.printStackTrace();   
     }   
     postMethod.releaseConnection();       
     System.out.println("POST响应参数："+response);      
     return response;  
 }  

/** 
  * post 
  * @param url POST地址 
  * @param data POST数据NameValuePair[] 
  * @return 响应的参数 
  */  
 public static String post(String url,NameValuePair[] data){------------------------get里面没有data只有url  
        
     String response = "";          
     HttpClient httpClient = new HttpClient();  
     PostMethod postMethod = new PostMethod(url);  
        
     //设置请求编码  
     postMethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"GBK");  
        
     postMethod.setRequestBody(data);--------------------------------get没有这一步  
        
     //设置请求头header参数  
     postMethod.setRequestHeader("userId","57601095");  
     postMethod.setRequestHeader("userSession","57601095");  
     postMethod.setRequestHeader("cityid","31000");  
        
     int statusCode = 0;  
        
     try {  
         statusCode = httpClient.executeMethod(postMethod);  
     } catch (HttpException e) {  
         e.printStackTrace();  
     } catch (IOException e) {  
         e.printStackTrace();  
     }  
        
     //301、302重定向  
     if(statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY){  
         Header locationHeader = postMethod.getResponseHeader("location");   
         String location = null;   
         if (locationHeader != null) {   
             location = locationHeader.getValue();   
             System.out.println("重定向跳转页面:" + location);   
             response= post(location,data);//用跳转后的页面重新请求。   
         } else {   
             System.err.println("location is null.");   
         }  
     }else {   
         System.out.println(postMethod.getStatusLine());   
         try {   
             byte[] b=postMethod.getResponseBody();  
             response = new String(b,"GBK");  
         } catch (IOException e) {   
             e.printStackTrace();   
         }   
         postMethod.releaseConnection();   
     }  
        
     System.out.println("POST响应参数："+response);  
        
     return response;  
 }