java Java中的绝对相对文件路径

Absolute to Relative File Path in Java

提问by Spoike

Given I have two Fileobjects I can think of the following implementation:

鉴于我有两个File对象，我可以想到以下实现：

public File convertToRelative(File home, File file) {
    final String homePath = home.getAbsolutePath();
    final String filePath = file.getAbsolutePath();

    // Only interested in converting file path that is a 
    // direct descendants of home path
    if (!filePath.beginsWith(homePath)) {
        return file;
    }

    return new File(filePath.substring(homePath.length()+1));
}

Is there some smarter way of converting an absolute file path to a relative file path?

是否有一些更智能的方法可以将绝对文件路径转换为相对文件路径？

Possible Duplicate:

How to construct a relative path in java from two absolute paths or urls

可能的重复：

java中如何从两个绝对路径或url构造相对路径

回答by Lombo

This question was asked before here

这个问题之前在这里问过

Here is the answer just in case

这是以防万一的答案

String path = "/var/data/stuff/xyz.dat";
String base = "/var/data";
String relative = new File(base).toURI().relativize(new File(path).toURI()).getPath();
// relative == "stuff/xyz.dat"