使用httpClient发送post请求连接restful接口

public static String httpPost(String url,String arg){
        InputStream is;
        BufferedReader br;
        StringBuilder sBuilder = null;
        try {
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost("url");
            //方式一：将参数添加到请求体当中
            httpPost.setEntity(new StringEntity(arg,"utf-8"));//默认是采用ISO-8859-1 对于中文需要使用utf-8编码
            //方式二: 如果需要传递多个参数
            List<NameValuePair> parameters = new ArrayList<>();
            parameters.add(new BasicNameValuePair("name","value"));
            parameters.add(new BasicNameValuePair("name","value"));
            parameters.add(new BasicNameValuePair("name","value"));
            parameters.add(new BasicNameValuePair("name","value"));
            httpPost.setEntity(new UrlEncodedFormEntity(parameters));
            HttpResponse httpResponse = httpClient.execute(httpPut);
            //连接成功
            if(200 == httpResponse.getStatusLine().getStatusCode()) {
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();
                br = new BufferedReader(new InputStreamReader(is));
                String tempStr;
                sBuilder = new StringBuilder();
                while ((tempStr = br.readLine()) != null) {
                    sBuilder.append(tempStr);
                }
                br.close();
                is.close();
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        return sBuilder==null? "":sBuilder.toString();
    }