首先，它看起来不需要开发FTP服务器.

其次，在窗口中打开文件"与FTP不相关.甚至听说过关注分离?

最后，您所需要的就是如何使用Java充当FTP客户端.但这可以在百万个地方找到.它们是:
http://lmgtfy.com/?q=java+ftp+client [

First, it looks like it does not require development of FTP server.

Second, "open the file in a window" is not related to FTP. Even heard of Separation of concerns?

Finally, all you need is how to use Java to act as an FTP client. But this can be found in million places. Here they are:
http://lmgtfy.com/?q=java+ftp+client[^].

—SA

正如SAKryukov指出的那样，有很多可用的替代方法.
Apache FtpServer [ ^ ]构建在 Apache MINA [

As SAKryukov points out, there is a lot of available alternatives.
The Apache FtpServer[^] is built built on top of Apache MINA[^]. This makes it quite interesting from an architectural point of view, and well worth investigating.

Best regards
Espen Harlinn