* @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;  
     JSONObject jsonResult = null;

     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"); 
          jsonResult = JSONObject.fromObject(response);  //将返回结果变成json格式

     } 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;

 }