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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);
}
}
}