httpClient的post的请求带参数传递

public static String httpPost(String url,Map<String,String> params){
		String result = null;
		CloseableHttpClient httpClient = HttpClients.createDefault();
        //2.声明post请求
        HttpPost httpPost = new HttpPost(url);
        //3.设置请求类型
        httpPost.addHeader("Content-Type","application/x-www-form-urlencoded");
        //4.添加参数
        List<NameValuePair> parameters = new ArrayList<NameValuePair>();
        for (Map.Entry<String, String> entry : params.entrySet()) {
            parameters.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
        }

        UrlEncodedFormEntity formEntity;
		try {
			formEntity = new UrlEncodedFormEntity(parameters,"UTF-8");
			httpPost.setEntity(formEntity);
			
			//5.发送请求
			CloseableHttpResponse response = httpClient.execute(httpPost);
			LOG.debug("----------------返回信息："+response.getEntity());
			if(response.getStatusLine().getStatusCode()==200){
				HttpEntity entity = response.getEntity();
				result = EntityUtils.toString(entity, "utf-8");
			}
			//6.关闭资源
			response.close();
			httpClient.close();
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return result;
	}