Spring validation request body as string

Question

I have endpoint with request body as String object, which contains a phone number:

@PostMapping("/phone-number") 
public Response phoneNumberRequest(@RequestBody @Valid @Pattern(regexp="myRegexp") String phoneNumber) {
...
}

I have just one request parameter phoneNumber , so I don't need a JSON object. I need to validate a phone number. But @Valid annotation doesn't work with @Pattern(regexp = "myRegexp") when request body is the simple String object. So my question is why? How can I validate phone number in this case?

Answer 1

I would suggest the following:

@PostMapping("{phone-number}")
public Response phoneNumberRequest(
  @PathVariable String phone-number) {

  Boolean valid = phone-number.matches("your-regex");
  ...

}