如何使用apache common vfs上传字节数组

Question

我陷入了使用 apache common vfs 上传字节数组的困境，下面是使用文件路径上传文件的示例，我用谷歌搜索但没有得到使用字节数组上传文件的解决方案

    public static boolean upload(String localFilePath, String remoteFilePath) {

    boolean result = false;

    File file = new File(localFilePath);

    if (!file.exists())

        throw new RuntimeException("Error. Local file not found");

    try (StandardFileSystemManager manager = new StandardFileSystemManager();

            // Create local file object

            FileObject localFile = manager.resolveFile(file.getAbsolutePath());

            // Create remote file object

            FileObject remoteFile = manager.resolveFile(

                    createConnectionString(hostName, username, password, remoteFilePath),

                    createDefaultOptions());) {

        manager.init();

        // Copy local file to sftp server

        remoteFile .copyFrom(localFile, Selectors.SELECT_SELF);

        result = true;

    } catch (Exception e) {

        throw new RuntimeException(e);

    }

    return result;

}

并且工作正常。

下面是使用FTPSClient上传字节数组的代码

 private boolean uploadFtp(FTPSClient ftpsClient, byte[] fileData, String fileName) {

 boolean completed = false;

 byte[] bytesIn = new byte[4096];

 try (InputStream inputStream = new ByteArrayInputStream(fileData); OutputStream outputStream =

  ftpsClient.storeFileStream(fileName);) {

  int read = 0;

  while ((read = inputStream.read(bytesIn)) != -1) {

   outputStream.write(bytesIn, 0, read);

  }

  completed = ftpsClient.completePendingCommand();

  if (completed) {

   logger.info("File uploaded successfully societyId");

  }

 } catch (IOException e) {

 logger.error("Error while uploading file to ftp server", e);

 }

 return completed;

}

Answer 1

这是一个老问题，但我遇到了同样的问题，并且我能够在不假设本地文件的情况下解决它，例如使用 ByteArrayInputStream，所以这对于与 pise 遇到相同问题的人可能很有用。基本上，我们可以将输入流直接复制到远程文件的输出流中。代码是这样的：InputStream is = ... // you only need an input stream, no local file, e.g. ByteArrayInputStream    DefaultFileSystemManager fsmanager = (DefaultFileSystemManager) VFS.getManager();        FileSystemOptions opts = new FileSystemOptions();FtpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(opts, true);StaticUserAuthenticator auth = new StaticUserAuthenticator(host, username, password);         DefaultFileSystemConfigBuilder.getInstance().setUserAuthenticator(opts, auth);        String ftpurl = "ftp://" + host + ":" + port + "/" + folder + "/" + filename;FileObject remoteFile = fsmanager.resolveFile(ftpurl, opts);        try (OutputStream ostream = remoteFile.getContent().getOutputStream()) {    // either copy input stream manually or with IOUtils.copy()    IOUtils.copy(is, ostream);}        boolean success = remoteFile.exists();long size = remoteFile.getContent().getSize();System.out.println(success ? "Successful, copied " + size + " bytes" : "Failed");

Answer 2

/** * Write the byte array to the given file. * * @param file The file to write to * @param data The data array * @throws IOException */public static void writeData(FileObject file, byte[] data)        throws IOException {    OutputStream out = null;    try {        FileContent content = file.getContent();        out = content.getOutputStream();        out.write(data);    } finally {        close(out);    }}