swing 页面，可用于ftp上传下载，可自己设置ftp地址，页面清晰简单，有上传滚动条，左边页面为本地磁盘，右边为ftp文件，有右键功能-swing page, can be used for ftp upload and download, you can set up their own ftp address, pages clear and simple, upload the scroll bar on the left page of a local disk, the right