HttpClient接口协议

httpclient使用步骤

1.导入包

2.创建http请求池

CloseableHttpClient httpClient = HttpClients.createDefault();

3.创建某个请求 post get

HttpGet get = new HttpGet("http://www.baidu.com");

数据封装问题

StringEntity stringEntity = new StringEntity(params, "utf-8");
stringEntity.setContentEncoding("UTF-8");   stringEntity.setContentType("application/json");   
httpPost.setEntity(stringEntity);

4.调用第三步创建好的实例 execute

CloseableHttpResponse response = httpClient.execute(httpPost);

5.处理response 返回HttpEntity

HttpEntity httpEntity = response.getEntity();

6.释放连接 无论执行方法是否成功 都必须释放连接 finally

response.close();