Encoded slash (/) with Spring RequestMapping path param gives HTTP 400

Question

This is not a duplicate referenced question, because it is Spring specific. Whoever added that (3 years after the fact!) didn\'t bother to read the question or comment

Answer 1

Another answer would be to encode "/" twice, which would produce "%252F".
In your mapped endpoint, Spring will decode it back to "%2F". All you need more is to decode it one more time using something like this:

URLDecoder.decode(encoded_URL, "UTF-8");