如何使用java获取文件的相对路径到一个文件夹 [英] How to get the relative path of the file to a folder using java

问题描述

可能存在重复：

使用java，是否有方法返回文件的相对路径到给定的文件夹？

using java, is there method to return the relative path of a file to a given folder?

推荐答案

Java没有包含任何方法来完成您想要的任务。也许在那里有一个图书馆是这样做的（我不能想到任何副手，而Apache Commons IO似乎没有）。你可以使用它或类似的东西：

There's no method included with Java to do what you want. Perhaps there's a library somewhere out there that does it (I can't think of any offhand, and Apache Commons IO doesn't appear to have it). You could use this or something like it:

// returns null if file isn't relative to folder
public static String getRelativePath(File file, File folder) {
    String filePath = file.getAbsolutePath();
    String folderPath = folder.getAbsolutePath();
    if (filePath.startsWith(folderPath)) {
        return filePath.substring(folderPath.length() + 1);
    } else {
        return null;
    }
}

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