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在Java中使用Apache Commons Net库中的FTPClient创建多级文件夹,可以按照以下步骤进行:
- 导入FTPClient类:
import org.apache.commons.net.ftp.FTPClient;
- 创建FTPClient对象:
FTPClient ftpClient = new FTPClient();
- 连接到FTP服务器:
ftpClient.connect(server, port); // 传入FTP服务器地址和端口号 ftpClient.login(username, password); // 传入FTP服务器的用户名和密码
- 设置文件传输模式为被动模式(可选):
ftpClient.enterLocalPassiveMode();
- 检查连接状态:
if (ftpClient.getReplyCode() != 230) { throw new IOException("Failed to connect to FTP server"); }
- 开启被动模式传输(可选):
ftpClient.enterLocalPassiveMode();
- 设置FTP服务器工作目录为根目录:
ftpClient.changeWorkingDirectory("/");
- 创建多级文件夹:
String[] folders = { "folder1", "folder2", "folder3" }; // 指定要创建的文件夹路径 for (String folder : folders) { ftpClient.makeDirectory(folder); ftpClient.changeWorkingDirectory(folder); }
- 断开与FTP服务器的连接:
ftpClient.logout(); // 退出登录 ftpClient.disconnect(); // 断开连接
完整的示例代码如下:
import org.apache.commons.net.ftp.FTPClient; import java.io.IOException; public class FTPCreateMultiLevelDirectories { public static void main(String[] args) { String server = "ftp.example.com"; int port = 21; String username = "username"; String password = "password"; String[] folders = { "folder1", "folder2", "folder3" }; FTPClient ftpClient = new FTPClient(); try { ftpClient.connect(server, port); ftpClient.login(username, password); if (ftpClient.getReplyCode() != 230) { throw new IOException("Failed to connect to FTP server"); } ftpClient.enterLocalPassiveMode(); ftpClient.changeWorkingDirectory("/"); for (String folder : folders) { ftpClient.makeDirectory(folder); ftpClient.changeWorkingDirectory(folder); } ftpClient.logout(); ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } }
这样就可以创建多级文件夹。请注意,如果要在已有的文件夹路径上创建新的文件夹,可以省略第7步中的ftpClient.changeWorkingDirectory("/")
,直接在当前工作目录下创建新的文件夹即可。