HttpClient httpClient = getClient();
        HttpResponse httpResponse;  
        HttpPost httpPost = new HttpPost("http://115.28.144.252:8977/api.aspx");  
        List <NameValuePair> nvps = new ArrayList <NameValuePair>();
        nvps.add(new BasicNameValuePair("req", "72")); 
        try{
            httpPost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
            httpResponse = new  DefaultHttpClient().execute(httpPost);  
            HttpEntity entity = httpResponse.getEntity();  
            String strRet = EntityUtils.toString(entity); 
            int responseCode = httpResponse.getStatusLine().getStatusCode();  
            String message = httpResponse.getStatusLine().getReasonPhrase();  
            if (responseCode == 200 && entity != null)  
            {  
                str = strRet;    
                
            }  else{
                str = "Error Response: "+message;
            }
        }

//GetClient方法
public HttpClient getClient() {  
        BasicHttpParams params = new BasicHttpParams();  
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);  
        HttpProtocolParams.setContentCharset(params, HTTP.DEFAULT_CONTENT_CHARSET);  
        HttpProtocolParams.setUseExpectContinue(params, true);  
      
        SchemeRegistry schReg = new SchemeRegistry();  
        schReg.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));  
        schReg.register(new Scheme("https", SSLTrustAllSocketFactory.getSocketFactory(), 443));  
        ClientConnectionManager connMgr = new ThreadSafeClientConnManager(params, schReg);  
        return new DefaultHttpClient(connMgr, params);  
    }