本文主要是介绍httpClient与openfeign，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
目录
介绍
maven坐标
发送请求步骤
发送get请求
发送post请求
介绍
是一个客户端编程的工具包，也就是在java程序中，可以构造http请求并且发送请求
maven坐标
httpclient
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
fastjson
<dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId> </dependency>
发送请求步骤
创建HttpClient对象
创建 Http请求对象
创建 HttpClient的execute方法发送请求
发送get请求
/*** 使用httpclient发送get请求*/
@Test
public void testGet() throws IOException {//创建httpclient对象CloseableHttpClient httpClient = HttpClients.createDefault();//创建请求对象HttpGet httpGet = new HttpGet("http://localhost:8080/user/shop/status");//发送请求，接收响应结果CloseableHttpResponse response = httpClient.execute(httpGet);//获取服务端返回的状态码int statusCode = response.getStatusLine().getStatusCode();System.out.println("服务端返回的状态码"+statusCode);HttpEntity entity = response.getEntity();String body = EntityUtils.toString(entity);System.out.println("服务端返回的数据为："+body);//关闭资源response.close();httpClient.close();}
发送post请求
/*** 使用httpclient发送post请求*/
@Test
public void testPOST() throws IOException {CloseableHttpClient httpClient = HttpClients.createDefault();HttpPost httpPost = new HttpPost("http://localhost:8080/admin/employee/login");//使用fastjson组装数据JSONObject jsonObject = new JSONObject();jsonObject.put("username", "admin");jsonObject.put("password", "123456");//提交请求体StringEntity entity = new StringEntity(jsonObject.toString());entity.setContentType("application/json");entity.setContentEncoding("UTF-8");httpPost.setEntity(entity);//发送请求CloseableHttpResponse response = httpClient.execute(httpPost);int statusCode = response.getStatusLine().getStatusCode();System.out.println("服务端返回的状态码"+statusCode);HttpEntity entity1 = response.getEntity();String body = EntityUtils.toString(entity1);System.out.println("服务端返回的数据为："+body);//关闭资源response.close();httpClient.close();}
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