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我想要做的是重写onUploadStart方法以进行自定义上传本地化（临时文件夹），然后重写onUploadEnd方法以将成功上传的文件复制到其原始目标文件夹。Apache Mina FTP Server 主页说“将调用此通知方法以指示文件传输成功并且服务器已发送回复。如果出现任何错误，将不会调用此方法。这是在 STOR 命令中调用的。” 但是......即使传输被中断结束，也会调用 onUploadEnd 方法。看看这段代码：

public class TestFtplet extends DefaultFtplet{

@Override
public FtpletResult onUploadStart(FtpSession session, FtpRequest request) {
    System.out.println("Receiving upload request. Starting...." + request.getCommand());
    return FtpletResult.DEFAULT;
}

@Override
public FtpletResult onUploadEnd(FtpSession session, FtpRequest request) {
    System.out.println("Ending uploading.... "+ request.getCommand() + request.getArgument() + request.getRequestLine());
    System.out.println(": " + session.getUserArgument() + session.toString());
    return FtpletResult.DEFAULT;
}

无论上传是否中断，我都有完全相同的输出。有没有办法在转移过程中捕获 ABOR 请求？

我在重写方法中编写了另一个代码beforeComand（下面的代码在request.getCommand()STOR 时运行）：

                        System.out.println("\n\n****** RECEIVED UPLOAD REQUEST *******\n\n");
                DataConnectionFactory dataConnectionFactory = session.getDataConnection();
                try {
                    System.out.println("Receiving file " + request.getArgument());
                    temporaryFile = File.createTempFile("FTP_", ".tmp");
                    OutputStream outputStream = new FileOutputStream(temporaryFile);
                    DataConnection dataConnection = dataConnectionFactory.openConnection();
                    session.write(new DefaultFtpReply(150, "Transfering data..."));
                    dataConnection.transferFromClient(session, outputStream);
                    System.out.println("Writing file to temporary destination " + temporaryFile.getAbsolutePath());
                    outputStream.flush();
                    outputStream.close();
                    Path source = Paths.get(temporaryFile.getAbsolutePath());
                    Path destination = Paths.get("C:\\apache-ftpserver-1.0.6\\res\\home\\"+request.getArgument());


                    if(request.getCommand().toUpperCase().equals("ABOR")) {
                        System.out.println("Upload interrupted!");
                        destination = Paths.get("C:\\apache-ftpserver-1.0.6\\res\\unfinished\\"+request.getArgument());
                        Files.move(source, destination, StandardCopyOption.REPLACE_EXISTING);
                        System.out.println("Moved file to " + destination);
                    } else {
                        Files.move(source, destination, StandardCopyOption.REPLACE_EXISTING);
                        System.out.println("Done! File moved to " + destination);
                    }

它成功地将文件写入临时文件夹，但if(request.getCommand().toUpperCase().equals("ABOR"))始终返回 false，即使 FTP 客户端中断上传并发送 ABOR。有没有办法处理这个？

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