Java：如何检查目录是否在其他目录内

Question

How can I check if a given file is under other file?

Ie I have new Paths.get("/foo/bar/") and new Paths.get("./abc/def.jar") . And I want to check whether the second is under /foo/bar .

I can figure out some string based comparisons like path.toFile().getAbsolutePath().startsWith(path2.toFile().getAbsolutePath()) , but that looks fragile and not right.

Answer 1

我发现了这个有用的Path.startsWith( Path other )方法，因此对我有用：

inputPath.toAbsolutePath().startsWith(outputDirectory.toAbsolutePath())