Invalid character found in the request target in spring boot

Question

My application is started with java -jar with version 1.5.6.RELEASE of spring boot.
The content of one of my request has the character \"{\".When it is sended to serve

Answer 1

Encode it to Base 64 string at request end and decode it at the controller end.

---

Encode

btoa(string)

---

Decode:

String arr = request.getParameter();
arr = new String(Base64.getDecoder().decode(arr))