FilePathExists Judge whether the given path file / folder exists.

GetFileSize 获取文件路径.

GetFullPath 获取绝对路径.

IsDir 判断所给路径是否为文件夹 IsDir returns true if given path is a dir, or returns false when it's a directory or does not exist.

IsFile 判断所给路径是否为文件 IsFile returns true if given path is a file, or returns false when it's a directory or does not exist.

Mkdir 创建目录.

MkdirAll 递归创建目录.

ReadFile 读取文件.

Sha1f return file sha1 encode.