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()));
Java MappedByteBuffer,布布扣,bubuko.com
原文：http://my.oschina.net/darionyaphet/blog/299237