[ツール] Java が http リダイレクトでアドレスを要求し、自動的にリダイレクトします

[ツール] Java が http リダイレクトでアドレスを要求し、自動的にリダイレクトします

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HTTPGETWithMultipleHeaders {
    public static void main(String[] args) {
        try {
            String urlToRead = "http://example.com"; // 你要请求的URL

            while (urlToRead != null) {
                URL url = new URL(urlToRead);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                connection.setRequestMethod("GET"); // 使用GET请求方式
                
                // 设置多个自定义请求头
                connection.setRequestProperty("User-Agent", "YourUserAgent");
                connection.setRequestProperty("Authorization", "Bearer YourAccessToken");
                connection.setRequestProperty("Custom-Header", "CustomValue");

                int responseCode = connection.getResponseCode();

                if (responseCode == HttpURLConnection.HTTP_OK) {
                    // 请求成功，读取响应内容
                    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                    String line;
                    while ((line = reader.readLine()) != null) {
                        System.out.println(line);
                    }
                    reader.close();
                    break; // 响应成功，不再重定向
                } else if (responseCode == HttpURLConnection.HTTP_MOVED_TEMP || responseCode == HttpURLConnection.HTTP_MOVED_PERM || responseCode == HttpURLConnection.HTTP_SEE_OTHER) {
                    // 处理重定向
                    String newUrl = connection.getHeaderField("Location");
                    if (newUrl != null) {
                        urlToRead = newUrl;
                    } else {
                        System.out.println("重定向地址未找到。");
                        break;
                    }
                } else {
                    System.out.println("HTTP请求失败，响应代码: " + responseCode);
                    break;
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}