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一、介绍

HttpClient是Apache Jakarta Common 下的子项目，可以用来提供高效的、最新的、功能丰富的支持 HTTP 协议的客户端编程工具包。 

HttpClient 是一个HTTP通信库、一个工具包，它只提供一个通用浏览器应用程序所期望的功能子集，与浏览器相比是没有界面的。

二、添加依赖

  <!--httpclient--><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.14</version></dependency>

二、测试

我们先创建一个用于测试的实体类

package com.example.fastjsondemo.model;import lombok.Data;/*** @author qx* @date 2023/8/29* @des 测试的实体类*/
@Data
public class Map {private String status;private String info;private String infocode;private String province;private String city;private String adcode;private String rectangle;
}

测试Get请求

  /*** 测试get请求*/@Testvoid testGet() throws IOException {String url = "https://restapi.amap.com/v3/ip?key=0113a13c88697dcea6a445584d535837&ip=171.110.83.78";CloseableHttpClient client = HttpClients.createDefault();HttpGet httpGet = new HttpGet(url);CloseableHttpResponse response = client.execute(httpGet);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {String json = EntityUtils.toString(response.getEntity());Map map = JSONObject.parseObject(json, Map.class);System.out.println(map);}}

执行Get请求输出:

Map(status=1, info=OK, infocode=10000, province=广西壮族自治区, city=梧州市, adcode=450400, rectangle=111.1604726,23.41005092;111.4408064,23.57943575)

测试Post请求

/*** 测试Post请求** @throws IOException*/@Testvoid testPost() throws IOException {CloseableHttpClient client = HttpClients.createDefault();String url = "https://restapi.amap.com/v3/ip";HttpPost httpPost = new HttpPost(url);// 参数设置List<NameValuePair> paramList = new ArrayList<>();paramList.add(new BasicNameValuePair("key", "0113a13c88697dcea6a445584d535837"));paramList.add(new BasicNameValuePair("ip", "171.110.83.78"));// 设置httpPost使用的参数httpPost.setEntity(new UrlEncodedFormEntity(paramList));// 执行CloseableHttpResponse response = client.execute(httpPost);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {String json = EntityUtils.toString(response.getEntity());Map map = JSONObject.parseObject(json, Map.class);System.out.println(map);}}

执行Post请求输出

Map(status=1, info=OK, infocode=10000, province=广西壮族自治区, city=梧州市, adcode=450400, rectangle=111.1604726,23.41005092;111.4408064,23.57943575)