参数校验:validation

@ControllerAdvice
@ResponseBody
public class GlobalExceptionInterceptor {
    @ExceptionHandler(value = Exception.class)
    public String exceptionHandler(HttpServletRequest request, Exception e) {
        String failMsg = null;
        if (e instanceof MethodArgumentNotValidException) {
            //获取参数校验具体异常信息提示
            failMsg = ((MethodArgumentNotValidException) e).getBindingResult().getFieldError().getDefaultMessage();
        }
        return failMsg;
    }
}