HttpClient

HttpClient

  • HttpClientApache Jakarta Common下的子项目 ,可以用来提供高效的、最新的、功能丰富的的支持Http协议的客户端编程包
  • 总结:可以用来发送http请求 核心Api
  1. HttpClient:发送一个http请求
  2. HttpClients:创建一个HttpClient对象
  3. CloseableHttpClient:创建一个HttpClient对象
  4. HttpGet:发送一个get请求
  5. HttpPost:发送一个post请求

发送请求步骤

  1. 创建HttpClient对象
  2. 创建Http请求对象,设置url访问地址
  3. 调用HttpClient对象的execute()方法,并传入请求对象,获取响应对象
package com.sky.text;

import com.google.gson.JsonObject;
import com.sky.SkyApplication;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest(classes = SkyApplication.class)
public class HttpClientText {
    /**
     * 通过HttpClient发送GET请求
     */
    @Test
    public void testGet() throws Exception {
//        1.创建HttpClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        //2.创建请求的对象
        HttpGet httpGet = new HttpGet("http://localhost:8080/user/shop/status");
        //发送请求  并接收响应结果
        CloseableHttpResponse response = httpClient.execute(httpGet);
        //获取服务端返回的状态码
        int statusCode = response.getStatusLine().getStatusCode();
        System.out.println(statusCode);
        if (statusCode == 200) {
            String result = EntityUtils.toString(response.getEntity(), "UTF-8");
            System.out.println(result);
        }
        //请求完毕 关闭响应
        response.close();
        //关闭httpClient对象
        httpClient.close();
    }

    /**
     * 通过HttpClient发送POST请求
     */
    @Test
    public void testPost() throws Exception {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost("http://localhost:8080/admin/employee/login");
        //设置请求参数
        JsonObject jsonObject = new JsonObject();
        jsonObject.addProperty("username", "admin");
        jsonObject.addProperty("password", "123456");
        StringEntity stringEntity = new StringEntity(jsonObject.toString());
        //设置请求编码
        stringEntity.setContentEncoding("utf-8");
        //设置数据类型
        stringEntity.setContentType("application/json");
        //设置请求参数
        httpPost.setEntity(stringEntity);
        //设置请求头
        httpPost.setHeader("Content-Type", "application/json");
        CloseableHttpResponse response = httpClient.execute(httpPost);
        int statusCode = response.getStatusLine().getStatusCode();
        System.out.println(statusCode);
        if (statusCode == 200) {
            String result = EntityUtils.toString(response.getEntity(), "UTF-8");
            System.out.println(result);
        }
        response.close();
        httpClient.close();
    }

}

上次更新 2025/9/9 20:40:32
ON THIS PAGE