使用文件锁定写入文件

import java.nio.ByteBuffer;

import java.nio.channels.AsynchronousFileChannel;

import java.nio.channels.FileLock;

import java.nio.file.Path;//来自 时   代     Java  公  众  号 - nowjava.com

import java.nio.file.Paths;

import java.nio.file.StandardOpenOption;

import java.util.concurrent.Future;


public class Main {

  public static void main(String[] args) {

    ByteBuffer buffer = ByteBuffer.wrap("this is a test.".getBytes());

    Path path = Paths.get("C:/folder1/", "test.txt");

    try (AsynchronousFileChannel asynchronousFileChannel = AsynchronousFileChannel/*时代Java公众号 - nowjava.com 提 供*/

        .open(path, StandardOpenOption.WRITE)) {

      Future<FileLock> featureLock = asynchronousFileChannel.lock();

      System.out.println("Waiting for the file to be locked ...");

      FileLock lock = featureLock.get();

      // FileLock lock = asynchronousFileChannel.lock().get();

      if (lock.isValid()) {

        Future<Integer> featureWrite = asynchronousFileChannel.write(buffer, 0);

        System.out.println("Waiting for the bytes to be written ...");

        int written = featureWrite.get();