SFTP（Secure File Transfer Protocol）的文件下载和上传

JSch库来实现SFTP（Secure File Transfer Protocol）的文件下载和上传

import com.jcraft.jsch.*;
public class SftpExample {
	public static void main(String[] args) {
		String host = "your_sftp_host";
		int port = 22;
		String username = "your_username";
		String password = "your_password";
		// 文件下载 
		String remoteFilePath = "/remote/path/to/file.txt";
		String localFilePath = "local/path/to/save/file.txt";
		downloadFile(host, port, username, password, remoteFilePath, localFilePath);
		// 文件上传
		String localFileToUpload = "local/path/to/upload/file.txt";
		String remoteDirectory = "/remote/path/to/upload/";
		uploadFile(host, port, username, password, localFileToUpload, remoteDirectory);
	}
	public static void downloadFile(String host, int port, String username, String password, String remoteFilePath, String localFilePath) {
		try {
			JSch jsch = new JSch();
			Session session = jsch.getSession(username, host, port);
			session.setPassword(password);
			session.setConfig("StrictHostKeyChecking", "no");
			session.connect();
			ChannelSftp channelSftp = (ChannelSftp) session.openChannel("sftp");
			channelSftp.connect();
			channelSftp.get(remoteFilePath, localFilePath);
			channelSftp.disconnect();
			session.disconnect();
			System.out.println("File downloaded successfully.");
		}
		catch (JSchException | SftpException e) {
			e.printStackTrace();
		}
	}
	public static void uploadFile(String host, int port, String username, String password, String localFilePath, String remoteDirectory) {
		try {
			JSch jsch = new JSch();
			Session session = jsch.getSession(username, host, port);
			session.setPassword(password);
			session.setConfig("StrictHostKeyChecking", "no");
			session.connect();
			ChannelSftp channelSftp = (ChannelSftp) session.openChannel("sftp");
			channelSftp.connect();
			channelSftp.put(localFilePath, remoteDirectory);
			channelSftp.disconnect();
			session.disconnect();
			System.out.println("File uploaded successfully.");
		}
		catch (JSchException | SftpException e) {
			e.printStackTrace();
		}
	}
}


import com.jcraft.jsch.*;
public class SftpExample {
	public static void main(String[] args) {
		String host = "your_sftp_host";
		int port = 22;
		String username = "your_username";
		String password = "your_password";
		// 文件夹下载 
		String remoteFolderPath = "/remote/path/to/folder";
		String localFolderPath = "local/path/to/save/folder";
		downloadFolder(host, port, username, password, remoteFolderPath, localFolderPath);
	}
	public static void downloadFolder(String host, int port, String username, String password, String remoteFolderPath, String localFolderPath) {
		try {
			JSch jsch = new JSch();
			Session session = jsch.getSession(username, host, port);
			session.setPassword(password);
			session.setConfig("StrictHostKeyChecking", "no");
			session.connect();
			ChannelSftp channelSftp = (ChannelSftp) session.openChannel("sftp");
			channelSftp.connect();
			// 创建本地文件夹
			java.nio.file.Path localPath = java.nio.file.Paths.get(localFolderPath);
			java.nio.file.Files.createDirectories(localPath);
			// 下载文件夹 
			channelSftp.get(remoteFolderPath + "/*", localFolderPath);
			channelSftp.disconnect();
			session.disconnect();
			System.out.println("Folder downloaded successfully.");
		}
		catch (JSchException | SftpException | java.io.IOException e) {
			e.printStackTrace();
		}
	}
}
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