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Java中如何将文件属性从一个文件复制到另一个文件？

[英]How to copy file attributes from one file to another in Java?

原文 2020-12-23 20:35:22 5 1 java/ file/ attributes/ copy

How can I copy file attributes (creation time, modification time, etc...) from one file to another in Java, and just the attributes?如何在 Java 中将文件属性（创建时间、修改时间等）从一个文件复制到另一个文件，并且只复制属性？ (not the file itself) （不是文件本身）

Similarly to touch -r file1 file2 , which is what I ended up doing calling it remotely ( Runtime.getRuntime().exec("touch -r file1 file2") ), but in a Java way (and potentially system agnostic).类似于touch -r file1 file2 ，这就是我最终远程调用它的方式（ Runtime.getRuntime().exec("touch -r file1 file2") ），但是以 Java 的方式（并且可能与系统无关）。

I've seen a few other threads about copying mp3/mp4 attributes, but in my case I am interested in the file attributes (without actually copying the file, only its attributes).我已经看到了一些关于复制 mp3/mp4 属性的其他线程，但就我而言，我对文件属性感兴趣（没有实际复制文件，只复制它的属性）。

1 个解决方案

The 'new' (it's over 10 years old at this point) Files API does have facilities both for common attributes (such as 'last modified', which all filesystems/OSes tend to have), as well as specific attributes (such as posix ones, including owner/group), in a pluggable fashion. “新”（此时已有 10 多年历史） Files API 确实具有通用属性（例如所有文件系统/操作系统往往具有的“最后修改”）以及特定属性（例如 posix那些，包括所有者/组），以可插入的方式。

You can at the very least use these APIs to copy over the common attributes, as well as the posix-special ones, and given that you mentioned touch -r , that's probably all you need.您至少可以使用这些 API 来复制通用属性以及 posix 特殊属性，鉴于您提到了touch -r ，这可能就是您所需要的。

Files API . Files API 。 Check in particular readAttributes , setAttribute , set/getPosixFilePermissions .特别检查readAttributes 、 setAttribute 、 set/getPosixFilePermissions 。