使用代理发送HTTP请求

<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents.client5/httpclient5 -->
<dependency><groupId>org.apache.httpcomponents.client5</groupId><artifactId>httpclient5</artifactId><version>5.2.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents.client5/httpclient5-fluent -->
<dependency><groupId>org.apache.httpcomponents.client5</groupId><artifactId>httpclient5-fluent</artifactId><version>5.2.1</version>
</dependency>

import org.apache.hc.client5.http.fluent.Request;
import org.apache.hc.core5.http.HttpHost;
import java.net.URI;
import java.util.Base64;public static void main(String[] args) throws Exception {String target = "http://www.baidu.com";URI proxyURI = new URI("http://代理用户名:代理密码@代理服务器:端口号");String basicAuth = new String(Base64.getEncoder().encode(proxyURI.getUserInfo().getBytes()));String response = Request.get(target).addHeader("Proxy-Authorization", "Basic " + basicAuth).viaProxy(HttpHost.create(proxyURI)).execute().returnContent().asString();System.out.println(response);
}