Question

I have a file that I need to reload in my application everytime it changes.

I’m checking its lastModified and I’d also like to check its md5sum before I process it.

I’m using Spring framework, in case there is something useful in there.

What’s the best way to check this? Any examples/libraries that I should check?

Thanks.

Answer 1

the explanation and code snippet in this link might help you

just for the record , there is a common issue in most of snippets that use bigInteger , the bigInteger class removes extra zeros at the start of the string so you might want to add a check like that

    String res =new BigInteger(1,m.digest()).toString(16);
    if (res.length() == 31)
          res = "0" + res;