1支持站点目录和文件结构浏览。 2支持断线自动重新连接并自动恢复传输。 3文件列表过滤，远程编辑，整个远端目录删除，目录上传下载。 -1 to support the site visit the directory and file structure. 2 support disconnected automatically re-connect and automatically resume the transfer. 3, filter the list of files