java中怎么用ftpclient創(chuàng)建多級(jí)文件夾

小億
378
2023-10-27 11:07:58

在Java中使用Apache Commons Net庫(kù)中的FTPClient創(chuàng)建多級(jí)文件夾,可以按照以下步驟進(jìn)行:

  1. 導(dǎo)入FTPClient類(lèi):
import org.apache.commons.net.ftp.FTPClient;
  1. 創(chuàng)建FTPClient對(duì)象:
FTPClient ftpClient = new FTPClient();
  1. 連接到FTP服務(wù)器:
ftpClient.connect(server, port); // 傳入FTP服務(wù)器地址和端口號(hào)
ftpClient.login(username, password); // 傳入FTP服務(wù)器的用戶(hù)名和密碼
  1. 設(shè)置文件傳輸模式為被動(dòng)模式(可選):
ftpClient.enterLocalPassiveMode();
  1. 檢查連接狀態(tài):
if (ftpClient.getReplyCode() != 230) {
    throw new IOException("Failed to connect to FTP server");
}
  1. 開(kāi)啟被動(dòng)模式傳輸(可選):
ftpClient.enterLocalPassiveMode();
  1. 設(shè)置FTP服務(wù)器工作目錄為根目錄:
ftpClient.changeWorkingDirectory("/");
  1. 創(chuàng)建多級(jí)文件夾:
String[] folders = { "folder1", "folder2", "folder3" }; // 指定要?jiǎng)?chuàng)建的文件夾路徑
for (String folder : folders) {
    ftpClient.makeDirectory(folder);
    ftpClient.changeWorkingDirectory(folder);
}
  1. 斷開(kāi)與FTP服務(wù)器的連接:
ftpClient.logout(); // 退出登錄
ftpClient.disconnect(); // 斷開(kāi)連接

完整的示例代碼如下:

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();
        }
    }
}

這樣就可以創(chuàng)建多級(jí)文件夾。請(qǐng)注意,如果要在已有的文件夾路徑上創(chuàng)建新的文件夾,可以省略第7步中的ftpClient.changeWorkingDirectory("/"),直接在當(dāng)前工作目錄下創(chuàng)建新的文件夾即可。

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