Question

如何在尝试删除文件/文件夹之前检查文件/文件夹是否已打开。
我是以编程方式删除它..在删除之前，需要检查它是否已打开

我想要这样的东西，

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

我尝试了以下两个代码集，但没有任何工作

     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();
}

Answer 1

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

在删除之前检查文件或文件夹是否已打开

1 个答案: