Question

怎么避免多线程同时读写文件

Answer 1

Java中不同的线程是可以同时操作一个文件的，只不过有时候因为进程执行的快慢，会出现数据读取不同步的问题，例子如下：Public class Readfile implements Runnable{ public void run(){ FileInputStream inputStream = new FileInputStream(file);//读数据 byte[] buffer = new byte[1024]; int size; while ((size = inputStream.read(buffer)) > 0) { outputStream.write(buffer, 0, size);//写数据 } inputStream.close();// outputStream.close(); } public satatic void main(String args []) throws InterruptedException{ Readfile rf = new Readfile(); Thread t1 = new Thread(rf);//开启一个线程 Thread t2 = new Thread(rf);//开启第二个线程 t1.start(); t2.start(); }}