file,path,uri互相轉換

uri 轉 file ：File file = new File(new URI(uri.toString()));

uri 轉 path: Path path = Files.get(uri);

file 轉 uri: URI uri = file.toURI();

file 轉 path: Path path = Paths.get(file.getPath());

path 轉 uri: URI uri = path.toUri()

path 轉 file: File file = new File(path.toUri());