HttpClient4.5.6设置代理以及代理验证（用户名和密码）

快来打我* 2021-09-17 07:54 1345阅读 0赞

[https://blog.csdn.net/manong\_123/article/details/82531004][https_blog.csdn.net_manong_123_article_details_82531004]

HttpClient4.5.6设置代理以及代理验证（用户名和密码）  
下载 httpcomponents-client-4.5.6-bin 在Apache官网有，贴上链接：http://hc.apache.org/downloads.cgi 下载以后把对应的包导入工程即可（java和maven工程都行），下面说明如何设置代理验证:

import java.io.IOException;
    import org.apache.http.HttpHost;
    import org.apache.http.auth.AuthScope;
    import org.apache.http.auth.UsernamePasswordCredentials;
    import org.apache.http.client.CredentialsProvider;
    import org.apache.http.client.config.RequestConfig;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.impl.client.BasicCredentialsProvider;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.junit.jupiter.api.Test;
    
    public class DownloadPage
    {
        @Test
        public void downLoad()
        {
            try
            {
                // 设置代理HttpHost
                HttpHost proxy = new HttpHost("openproxy.huawei.com", 8080, "http");
    
                // 设置要访问的HttpHost,即是目标站点的HttpHost
                HttpHost target = new HttpHost("baidu.com", 80);
    
                // 设置认证
                CredentialsProvider provider = new BasicCredentialsProvider();
    
                provider.setCredentials(new AuthScope(proxy), new UsernamePasswordCredentials("username", "password"));
    
                CloseableHttpClient httpClient = HttpClients.custom().setDefaultCredentialsProvider(provider).build();
    
                RequestConfig config = RequestConfig.custom().setProxy(proxy).build();
    
                HttpGet httpGet = new HttpGet("/");
    
                httpGet.setConfig(config);
    
                CloseableHttpResponse resp = httpClient.execute(target, httpGet);
    
                if (resp.getStatusLine().getStatusCode() == 200)
                {
                    System.out.println("OK");
                }
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
    }

在执行请求时，请求设置用代理进行访问，但是代理需要验证，那么就会找到provider设置相关联的用户名和密码进行验证，所以设置provider时需要注意关联。说明一下setCredentials()这个方法可以添加多个验证账号和密码，看源代码可知就是ConcurrentHashMap（Map）的操作。

[https_blog.csdn.net_manong_123_article_details_82531004]: https://blog.csdn.net/manong_123/article/details/82531004