What is the best way to return different types of ResponseEntity in Spring MVC or Spring-Boot

Question

I have written simple rest application using Spring MVC 4 (or Spring-Boot). Within the controller I have return ResponseEntity. But in some cases I want to give

Answer 1

You can return generic wildcard to return Success and Error on a same request mapping method

public ResponseEntity method() {
    boolean b = // some logic
    if (b)
        return new ResponseEntity(HttpStatus.OK);
    else
        return new ResponseEntity(HttpStatus.CONFLICT); //appropriate error code
}

@Mark Norman answer is the correct approach