javaj代码实现ftp删除文件夹

以下是Java代码实现FTP删除文件夹的示例：

import org.apache.commons.net.ftp.FTPClient;
import java.io.IOException;

public class FtpDeleteFolderExample {
    public static void main(String[] args) {
        String server = "ftp.example.com";
        int port = 21;
        String user = "username";
        String password = "password";
        String folderPath = "/example/folder/to/delete";

        FTPClient ftpClient = new FTPClient();
        try {
            ftpClient.connect(server, port);
            ftpClient.login(user, password);
            ftpClient.enterLocalPassiveMode();
            ftpClient.changeWorkingDirectory(folderPath);

            deleteFolder(ftpClient, folderPath);

            ftpClient.logout();
            ftpClient.disconnect();
            System.out.println("Folder deleted successfully.");
        } catch (IOException ex) {
            System.out.println("Error: " + ex.getMessage());
            ex.printStackTrace();
        }
    }

    private static void deleteFolder(FTPClient ftpClient, String folderPath) throws IOException {
        ftpClient.changeWorkingDirectory(folderPath);
        for (String fileName : ftpClient.listNames()) {
            if (fileName.equals(".") || fileName.equals("..")) {
                continue;
            }
            String filePath = folderPath + "/" + fileName;
            if (ftpClient.listFiles(filePath).length > 0) {
                deleteFolder(ftpClient, filePath);
            }
            ftpClient.deleteFile(filePath);
        }
        ftpClient.changeToParentDirectory();
        ftpClient.removeDirectory(folderPath);
    }
}

在这个示例中，我们使用 Apache Commons Net 库中的 FTPClient 类来连接 FTP 服务器并执行删除操作。该示例列出了要删除的文件夹中的所有文件和子文件夹，并递归地删除它们。最后，它删除要删除的文件夹本身。