Answer my own question.
private static boolean isH2DbFile(final File file) {
if (!file.exists() || (file.length() < 1024)) {
return false;
}
try (final RandomAccessFile in = new RandomAccessFile(file, "r")) {
final byte[] headerBytes = new byte[20];
in.read(headerBytes);
final String header = new String(headerBytes);
if ((header.indexOf("H:2,blockSize:") == 0) // v1.4.x, no encryption
|| (header.indexOf("-- H2 0.5/B --") == 0) // v1.3.x
|| (header.indexOf("H2encryp") == 0) // v1.4.x, encrypted.
) {
in.close();
return true;
}
} catch (final Exception e) {
e.printStackTrace();
}
return false;
}
在 2016年11月8日星期二 UTC+8下午2:49:52，Trig Chen写道：
>
> Hi all,
>
> I used FilePathWrapper to remap H2 database file *.h2.db to *.xxx.
> So come to the problem: Is there any API in H2 packages to determine
> whether a file is H2 database?
>
> Best regards,
> Trig Chen
>
>
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