Vue project submits a form form, the backend cannot receive parameters

Problem resolution:

        Reason: The value transfer method is request payload

        Solution:

              1: The backend uses @RequestBody annotation

              2: Serialize json on the front end (recommended)

                   The advantage of this is that it is more convenient for the back-end to receive parameters, and there is no need to add any annotations, and there is no need to deal with json.

                  import qs from 'qs'