httpclient是apache封装的用于http请求的工具包,和python的requests类似。这里介绍一些简单功能的使用。后续根据需求也会慢慢扩展
使用HttpClient请求一个Http请求的步骤为:
(1)创建一个HttpClient对象
(2)创建一个Request对象
(3)使用HttpClient来执行Request请求,得到对方的response
(4)处理response
(5)关闭HttpClient
package apitest; import java.io.IOException; import java.text.ParseException; import org.apache.http.HttpEntity; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClientBuilder; import org.apache.http.util.EntityUtils; public class TestHpptClient { public static void main(String[] args) { doGetTestOne(); } public static void doGetTestOne() { // 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的) CloseableHttpClient httpClient = HttpClientBuilder.create().build(); //创建一个Request对象 HttpGet httpGet = new HttpGet("http://118.24.13.38:8080/goods/UserServlet?method=loginMobile&loginname=test1&loginpass=test1"); // 响应模型 CloseableHttpResponse response = null; try { // 由客户端执行(发送)Get请求 response = httpClient.execute(httpGet); // 从响应模型中获取响应实体 HttpEntity responseEntity = response.getEntity(); System.out.println("响应状态为:" + response.getStatusLine()); if (responseEntity != null) { System.out.println("响应内容长度为:" + responseEntity.getContentLength()); System.out.println("响应内容为:" + EntityUtils.toString(responseEntity)); } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { // 释放资源 if (httpClient != null) { httpClient.close(); } if (response != null) { response.close(); } } catch (IOException e) { e.printStackTrace(); } } } }