从java中的url获取文件夹列表。

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

public class FolderListFromURL {
    public static void main(String[] args) {
        String urlString = "http://example.com/folder/"; // 替换为实际的URL地址

        try {
            URL url = new URL(urlString);
            URLConnection connection = url.openConnection();
            InputStream inputStream = connection.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

            String line;
            List<String> folderList = new ArrayList<>();

            while ((line = reader.readLine()) != null) {
                if (line.contains("href=\"") && line.contains("/")) {
                    String folderName = line.substring(line.indexOf("\"") + 1, line.lastIndexOf("/"));
                    folderList.add(folderName);
                }
            }

            reader.close();
            inputStream.close();

            for (String folder : folderList) {
                System.out.println(folder);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}