java - java中文件的状态

Question

如何知道文件的状态，即应用程序是否被阻止并且正在被阻止。在 Java 中，如果有用于此的 API，或者您可以使用 Java IO。

谢谢。

Answer 1

如果您询问文件锁，以下示例来自 Example Depot显示如何使用它:

try {
    // Get a file channel for the file
    File file = new File("filename");
    FileChannel channel = new RandomAccessFile(file, "rw").getChannel();

    // Use the file channel to create a lock on the file.
    // This method blocks until it can retrieve the lock.
    FileLock lock = channel.lock();

    // Try acquiring the lock without blocking. This method returns
    // null or throws an exception if the file is already locked.
    try {
        lock = channel.tryLock();
    } catch (OverlappingFileLockException e) {
        // File is already locked in this thread or virtual machine
    }

    // Release the lock
    lock.release();

    // Close the file
    channel.close();
} catch (Exception e) {
}