HTTPClient基本使用

Posted 2022-08-09 starstarstar

官方网站：https://hc.apache.org/

使用maven，在xml中引用

<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.2</version>
</dependency>

第一个demo

 

第一个.java文件

package com.httpclient.demo;

import org.apache.http.HttpEntity;
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;
import org.testng.annotations.Test;

import java.io.IOException;

public class HttpClientDemo 
    @Test
    public void test01() 
        //创建get请求
        String uri = "https://www.baidu.com";
        HttpGet get = new HttpGet(uri);
        //获取http客户端
        CloseableHttpClient client = HttpClientBuilder.create().build();
        //响应模型
        CloseableHttpResponse response = null;
        try 
            //由http客户端，发送get请求
            response = client.execute(get);
            //从响应中，获取响应实体
            HttpEntity respEntity = response.getEntity();
            String result = EntityUtils.toString(respEntity, "utf-8");
            System.out.println(result);
         catch (IOException e) 
            e.printStackTrace();
        
    

　执行结果：