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java File 判斷文件是否為符號鏈接
最簡單的方式，直接使用：
private static boolean isSymbolicLink(File f) throws IOException {
return !f.getAbsolutePath().equals(f.getCanonicalPath());
}
如果是普通文件，file.getAbsolutePath()和file.getCanonicalPath()是一樣的。
如果是link文件，file.getAbsolutePath()是鏈接文件的路徑；file.getCanonicalPath是實際文件的路徑（所指向的文件路徑）。
apache 使用的判斷方式：
The technique used in Apache Commons uses the canonical path to the parent directory, not the file itself. I don't think that you can guarantee that
a mismatch is due to a symbolic link, but it's a good indication that the file needs special treatment.
public static boolean isSymlink(File file) throws IOException {
if (file == null)
throw new NullPointerException("File must not be null");
File canon;
if (file.getParent() == null) {
canon = file;
} else {
File canonDir = file.getParentFile().getCanonicalFile();
canon = new File(canonDir, file.getName());
}
return !canon.getCanonicalFile().equals(canon.getAbsoluteFile());
}
最後更新：2017-04-03 16:48:31