目前没什么想说的  先刨个坑  留下一段代码 以后或许用得上吧 

SimpleDateFormat format = new SimpleDateFormat(PATTERN);
System.out.println(format.format(new Date()));
		
@SuppressWarnings("resource")
FileChannel channel = new FileInputStream(path).getChannel();
MappedByteBuffer buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0,
		channel.size());
Charset charset = Charset.forName("UTF8");
CharsetDecoder decoder = charset.newDecoder();
CharBuffer charBuffer = decoder.decode(buffer);
Scanner scanner = new Scanner(charBuffer).useDelimiter(System
		.getProperty("line.separator"));
try {
	while (scanner.hasNext()) {
		System.out.println(scanner.nextLine());
	}
} finally {
	channel.close();
	scanner.close();
}
System.out.println(format.format(new Date()));