var dir = new Directory('bb/cc/ff/ee');
dir.createSync(recursive: true);
//dir.createSync(recursive: false);
'bb/cc/ff/ee'是文件 '/bb/cc/ff/ee'是上级文件目录
true代表整个文件目录创建
false只创建最后一个
print(dir.absolute.path);
print(dir.path);
absolute代表绝对路径
dir.path代表相对路径
B:ab/cc/ff/ee
bb/cc/ff/ee