Java Jcraft 1.5 SFTP覆盖故障ID 4

我的覆盖不起作用，并返回失败4 ID。我可以写入此目标，而不会出现任何问题，但当过火继续失败时。当我使用winscp和这里使用的相同用户凭据时，我可以写和覆盖而不会出现问题。我不知道我的覆盖选项到底是怎么回事。如果文件在其中且覆盖为真，则应覆盖同名文件，但其不工作。我使用的是Jcraft 1.50，我不想升级到1.54，因为在我恢复库之前，该版本也存在同样的问题

//connect
try {
    session = jsch.getSession(user, host, port);
    session.setConfig("StrictHostKeyChecking", "no");
    session.setPassword( password );
    session.connect();

    Channel channel = session.openChannel( "sftp" );
    channel.connect();
    sftpChannel = (ChannelSftp) channel;

    //make sure that file does not exist or 
    //user wants to overwrite the file
    testStream = sftpChannel.get(destination);
    if (testStream != null && !overwrite) {
        throw new SftpException(ChannelSftp.SSH_FX_OP_UNSUPPORTED, "File already exists");
    }
} catch (SftpException e) {
    if (e.id == ChannelSftp.SSH_FX_NO_SUCH_FILE){
        //file does not yet exist. continue.
    } else {
        resultComments = "SFTP Exception " + e.getMessage();
        status = RunResult.FAIL;
        e.printStackTrace();
    }
} catch (JSchException e) {
    resultComments = "Jsch Exception " + e.getMessage();
    status = RunResult.FAIL;
    e.printStackTrace();
}
try {
    //if file does not exist or overwrite selected, transfer file
    if (testStream == null || overwrite) {
        ByteArrayInputStream fileByteInputStream = new ByteArrayInputStream(fileByteArray);
        if (sftpChannel !=  null) {
            String workingDirectory = destination.substring(0, destination.lastIndexOf("/") + 1);
            String fileName = destination.substring(destination.lastIndexOf('/') + 1, destination.length());
            sftpChannel.cd(workingDirectory);
            sftpChannel.put(fileByteInputStream, fileName, sftpChannel.OVERWRITE);        
            try {
                fileByteInputStream.close();
            } catch (IOException e) {
                resultComments = "SFTP Exception: Unable to close Input Stream." + e.getMessage();
                status = RunResult.FAIL;
                e.printStackTrace();
            }
            sftpChannel.exit();
        }
        if (session != null) {
            session.disconnect();
        }
    }
} catch (SftpException e) {
    resultComments = "SFTP Exception " + e.getMessage();
    status = RunResult.FAIL;
    e.printStackTrace();
} 

---

所以我解决了这个问题。似乎这个方法

sftpChannel.put(fileByteInputStream, fileName, sftpChannel.OVERWRITE); 

不能正常工作。尽管Jcraft文档清楚地说

put(String src, String dst, int mode)
//Uploads a file.

当我将其更改为另一种put方法时

sftpChannel.put(fileByteInputStream, fileName, null, sftpChannel.OVERWRITE); 

通过使用put方法，我的覆盖问题似乎消失了

put(String src, String dst, SftpProgressMonitor monitor, int mode)
//Uploads a file.

当文件已经存在并且我想覆盖它时，我能够传输而不发生任何故障