哪位手上有 <Java实现FTP批量大文件上传下载>的例子

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
 
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
 
/**
 * A program that demonstrates how to upload files from local computer
 * to a remote FTP server using Apache Commons Net API.
 * @author www.codejava.net
 */
public class FTPUploadFileDemo {
 
    public static void main(String[] args) {
        String server = "www.myserver.com";
        int port = 21;
        String user = "user";
        String pass = "pass";
 
        FTPClient ftpClient = new FTPClient();
        try {
 
            ftpClient.connect(server, port);
            ftpClient.login(user, pass);
            ftpClient.enterLocalPassiveMode();
 
            ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
 
            // APPROACH #1: uploads first file using an InputStream
            File firstLocalFile = new File("D:/Test/Projects.zip");
 
            String firstRemoteFile = "Projects.zip";
            InputStream inputStream = new FileInputStream(firstLocalFile);
 
            System.out.println("Start uploading first file");
            boolean done = ftpClient.storeFile(firstRemoteFile, inputStream);
            inputStream.close();
            if (done) {
                System.out.println("The first file is uploaded successfully.");
            }
 
            // APPROACH #2: uploads second file using an OutputStream
            File secondLocalFile = new File("E:/Test/Report.doc");
            String secondRemoteFile = "test/Report.doc";
            inputStream = new FileInputStream(secondLocalFile);
 
            System.out.println("Start uploading second file");
            OutputStream outputStream = ftpClient.storeFileStream(secondRemoteFile);
            byte[] bytesIn = new byte[4096];
            int read = 0;
 
            while ((read = inputStream.read(bytesIn)) != -1) {
                outputStream.write(bytesIn, 0, read);
            }
            inputStream.close();