MAVEN引入如下依赖包：

cn.hutool

hutool-all

5.3.5

com.squareup.okhttp3

okhttp

4.7.1

复制下面代码，新建Package：com.demo --> 新建Java类：Main
package com.demo;
import cn.hutool.http.HttpUtil;
import okhttp3.*;
import java.io.*;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.util.Objects;
import java.util.concurrent.TimeUnit;
public class Main {
// 需要请求的目标网址
private static final String TARGET_URL = "目标网址";
// 提取链接
private static final String API_URL = "提取链接";
public static void main(String[] args) {
String result = HttpUtil.get(API_URL);
System.out.println("从接口获取回来:" + result.strip());
String proxyIp = result.strip();
try {
Proxies(TARGET_URL, proxyIp);
Thread.sleep(500);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void Proxies(String urlString, String ipPort) {
try {
Response response = null;
try {
System.out.println("当前ip：" + ipPort);
String ip = ipPort.split(":")[0];
int port = Integer.parseInt(ipPort.split(":")[1]);
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(ip, port));
OkHttpClient httpClient = new OkHttpClient().newBuilder().proxy(proxy).connectTimeout(10, TimeUnit.SECONDS)
.build();
Request request = null;
request = (new Request.Builder().url(urlString).build());
response = httpClient.newCall(request).execute();
System.out.println("输出结果2：" + Objects.requireNonNull(response.body()).string());
} catch (IOException e) {
System.out.println("错误提示1");
e.printStackTrace();
}
} catch (Exception e) { System.out.println("错误提示2");
e.printStackTrace();
}
}
}

或者
测试2:
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.Proxy;
import java.net.URL;
import java.util.Base64;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


public class ProxyExample {

    public static void main(String[] args) throws IOException {
        String url = "https://ip.tool.lu";
        String proxyIp = "代理ip";
        int proxyPort = 端口;

        String encodedProxyAuth = Base64.getEncoder().encodeToString(proxyAuth.getBytes());

        // Set proxy properties
        System.setProperty("http.proxySet", "true");
        System.setProperty("http.proxyHost", proxyIp);
        System.setProperty("http.proxyPort", String.valueOf(proxyPort));
        System.setProperty("https.proxyHost", proxyIp);
        System.setProperty("https.proxyPort", String.valueOf(proxyPort));

        // Create URL object
        URL urlObj = new URL(url);

        // Open connection
        HttpURLConnection conn = (HttpURLConnection) urlObj.openConnection(Proxy.NO_PROXY);

        // Set headers
        conn.setRequestProperty("User-Agent", "Mozilla/5.0");

        // Set proxy authorization header
        conn.setRequestProperty("Proxy-Authorization", "Basic " + encodedProxyAuth);

        // Send GET request
        conn.setRequestMethod("GET");

        // Read response
        BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        // Print response
        System.out.println(response.toString());

        // Get response time
        long responseTime = conn.getHeaderFieldDate("Date", 0) - conn.getHeaderFieldDate("Date", 0);
        System.out.println(responseTime);
    }
}