Java動態轉發代理IP詳解

Java中實現動態轉發代理IP

在Java中實現動態轉發代理IP並不複雜，通常可以通過一些開源庫和框架來實現。下麵是一個簡單的實現思路：

設置HTTP請求：在Java中，可以使用HttpURLConnection或Apache HttpClient來發送HTTP請求。在發送請求時，可以通過設置Proxy對象來使用代理IP。

動態切換IP：在每次請求前，從IP池中隨機選擇一個IP作為代理。如果請求失敗，可以實現一個重試機制，換用其他IP重新發送請求。

實現代碼示例：

import java.net.HttpURLConnection;import java.net.InetSocketAddress;import java.net.Proxy;import java.net.URL;import java.util.List;import java.util.Random;

public class DynamicProxyExample {

    private static List<String> proxyList = List.of(

        "192.168.1.1:8080",

        "192.168.1.2:8080",

        "192.168.1.3:8080"

    );

    public static void main(String[] args) {

        try {

        String targetUrl = "http://example.com";

               String response = sendRequestWithDynamicProxy(targetUrl);

               System.out.println(response);

           } catch (Exception e) {

               e.printStackTrace();

           }

       }

       private static String sendRequestWithDynamicProxy(String targetUrl) throws Exception {

           // 隨機選擇一個代理IP

           String proxyAddress = proxyList.get(new Random().nextInt(proxyList.size()));

           String[] parts = proxyAddress.split(":");

           String ip = parts[0];

           int port = Integer.parseInt(parts[1]);

           // 設置代理

           Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(ip, port));

           URL url = new URL(targetUrl);

           HttpURLConnection connection = (HttpURLConnection) url.openConnection(proxy);

           // 設置請求屬性

           connection.setRequestMethod("GET");

           connection.setConnectTimeout(5000);

           connection.setReadTimeout(5000);

           // 獲取回應

           int responseCode = connection.getResponseCode();

           if (responseCode == HttpURLConnection.HTTP_OK) {

               try (BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {

                   StringBuilder response = new StringBuilder();

                   String inputLine;

                   while ((inputLine = in.readLine()) != null) {

                       response.append(inputLine);

                   }

                   return response.toString();

               }

           } else {

               throw new RuntimeException("Failed to connect: " + responseCode);

           }

       }

   }