public static String postHtml(String url,String charSet,Map<String,String> param){
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = postForm(url,param);
        HttpResponse httpResponse = null;
        try {
            httpResponse = httpClient.execute(httpPost);
        } catch (IOException e) {
            e.printStackTrace();
        }
        HttpEntity rspEntity = null;
        if (httpResponse != null) {
            rspEntity = httpResponse.getEntity();
            String html = null;
            try {
                html = InputStreamUtils.inputStream2String(rspEntity.getContent(),charSet);
            } catch (IOException e) {
                e.printStackTrace();
            }
            return html;
        }
        else {
            MyLog.logINFO("httpResponse is null!");
            return "";
        }

    }