如何用Java发现文件的创建时间？ [英] How to discover a File's creation time with Java?

问题描述

有没有一种简单的方法来发现一个文件的Java创建时间？ File类只有一个获取上次修改时间的方法。根据我在Google上发现的一些资源，File类没有提供getCreationTime（）方法，因为并不是所有的文件系统都支持创建时间的想法。

只有工作的解决方案，我发现了炮弹命令行，执行dir命令，看起来像输出文件的创建时间。我猜这是行得通的，我只需要支持Windows，但似乎很容易出错。

是否有任何第三方库提供我需要的信息？ / p>

更新：最后，我认为不值得购买第三方库，但它们的API看起来很漂亮好，所以对于有这个问题的其他人来说这可能是一个不错的选择。

解决方案

随着Java 7的发布，有一个内置的方法可以做到这一点：$ b​​
$ b

  Path path = Paths.get（path / to / file）; 
 BasicFileAttributes attributes = Files.readAttributes（path，BasicFileAttributes.class）; 
 FileTime creationTime = attributes.creationTime（）; 
  

请注意，并非所有操作系统都提供此信息。我相信在这些情况下，这将返回最后修改时间的mtime。

Windows确实提供了创建时间。

Is there an easy way to discover a File's creation time with Java? The File class only has a method to get the "last modified" time. According to some resources I found on Google, the File class doesn't provide a getCreationTime() method because not all file systems support the idea of a creation time.

The only working solution I found involes shelling out the the command line and executing the "dir" command, which looks like it outputs the file's creation time. I guess this works, I only need to support Windows, but it seems very error prone to me.

Are there any third party libraries that provide the info I need?

Update: In the end, I don't think it's worth it for me to buy the third party library, but their API does seem pretty good so it's probably a good choice for anyone else that has this problem.

解决方案

With the release of Java 7 there is a built-in way to do this:

Path path = Paths.get("path/to/file");
BasicFileAttributes attributes = Files.readAttributes(path, BasicFileAttributes.class);
FileTime creationTime = attributes.creationTime();

It is important to note that not all operating systems provide this information. I believe in those instances this returns the mtime which is the last modified time.

Windows does provide creation time.

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