Java 删除前检查文件或文件夹是否已打开 如何在尝试删除文件/文件夹之前检查其是否已打开

我正在以编程方式删除它。。删除前，需要检查其是否已打开

我想要这样的东西

            if(file/folder is open){
               //do not delete it
            }else{
               //delete it
             }

我尝试了以下两组代码，但都不起作用

     File scrptFile=new File(dirFile);
     boolean isFileUnlocked = false;
try {
    org.apache.commons.io.FileUtils.touch(scrptFile);
    isFileUnlocked = true;
} catch (IOException e) {
    isFileUnlocked = false;
}

if(isFileUnlocked){
    // Do stuff you need to do with a file that is NOT locked.
    System.out.println("file is not locked");
} else {
    // Do stuff you need to do with a file that IS locked
    System.out.println("file is locked");
}


       File file = new File(dirFile);
FileChannel channel = new RandomAccessFile(file, "rw").getChannel();
// Get an exclusive lock on the whole file
FileLock lock = channel.lock();
try {
    lock = channel.tryLock();
    // Ok. You get the lock
    System.out.println("Ok. You get the lock");
} catch (OverlappingFileLockException e) {
    // File is open by someone else
    System.out.println("File is open by someone else");
} finally {
    lock.release();
}

---

您可以使用Apache commons io api

  boolean flagFileNotInUse = false;
try {
    org.apache.commons.io.FileUtils.touch(yourFile);
    flagFileNotInUse = true;
} catch (IOException e) {
    flagFileNotInUse = false;
}

//然后检查flagFileNotInUse的值

  flagFileNotInUse = true, means file not in use
  flagFileNotInUse = false, means file in use

---

这是一个有趣的想法，但考虑到文件锁依赖于操作系统（并且在某些操作系统下有多种不同的方法），可能很难以清晰的方式确定。最好的办法是尝试。如果文件#delete由于某种原因无法删除该文件，则返回false。您可以检查一下，如果您将bool flagFileNotInUse命名或交换标志的值，是否会更清楚？@rferwarda:请参阅更新的帖子。上述代码适用于文件夹，但不适用于File@DarkKnight