如何检查Java 7 Path的扩展名 [英] How to check the extension of a Java 7 Path

问题描述

我想查看路径 （在Java 7中引入）以某种扩展结束。我尝试了 endsWith（）方法，如下所示：

I'd like to check if a Path (introduced in Java 7) ends with a certain extension. I tried the endsWith() method like so:

Path path = Paths.get("foo/bar.java")
if (path.endsWith(".java")){
    //Do stuff
}

然而，这似乎不起作用，因为 path.endsWith（。java）返回false。似乎 endsWith（）方法只有在最终目录分隔符之后的所有内容完全匹配时才返回true（例如 bar.java ），这对我来说不实用。

However, this doesn't seem to work because path.endsWith(".java") returns false. It seems the endsWith() method only returns true if there is a complete match for everything after the final directory separator (e.g. bar.java), which isn't practical for me.

那么如何检查路径的文件扩展名？

So how can I check the file extension of a Path?

推荐答案

Java NIO的 PathMatcher 提供 FileSystem.getPathMatcher（String syntaxAndPattern）：

Java NIO's PathMatcher provides FileSystem.getPathMatcher(String syntaxAndPattern):

PathMatcher matcher = FileSystems.getDefault().getPathMatcher("glob:*.java");

Path filename = ...;
if (matcher.matches(filename)) {
    System.out.println(filename);
}

参见查找文件教程了解详情。

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