Java高并发读写文件[通俗易懂]

public void run() {
        File file = new File("/home/test.txt");
        RandomAccessFile fout = null;
        FileChannel fcout = null;
        try {
            fout = new RandomAccessFile(file, "rw");
            long filelength = fout.length();//获取文件的长度
            fout.seek(filelength);//将文件的读写指针定位到文件的末尾
            fcout = fout.getChannel();//打开文件通道
            FileLock flout = null;
            while (true) {
                try {
                    flout = fcout.tryLock();//不断的请求锁，如果请求不到，等一秒再请求
                    break;
                } catch (Exception e) {
                    System.out.print("lock is exist ......");
                    sleep(1000);
                }
            }
            String str = " hello word!!!!\n";//需要写入的内容

            fout.write(str.getBytes());//将需要写入的内容写入文件

            flout.release();
            fcout.close();
            fout.close();

        } catch (IOException e1) {
            e1.printStackTrace();
            System.out.print("file no find ...");
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            if (fcout != null) {
                try {
                    fcout.close();
                } catch (IOException e) {
                    e.printStackTrace();
                    fcout = null;
                }
            }
            if (fout != null) {
                try {
                    fout.close();
                } catch (IOException e) {
                    e.printStackTrace();
                    fout = null;
                }
            }
        }

    }