/**
 * 获取方法参数验证器
 *
 * @param parametric 参数
 * @return 参数验证器
 */
protected Validator getValidator(final WrapperParametric parametric) {
    //过滤掉了不验证的方法或泛型接口
    if (validator == null || !parametric.getBoolean(VALIDATION_OPTION.getName(), validation)) {
        return null;
    }
    try {
        Method method = getPublicMethod(interfaceClass, parametric.getName());
        //判断该方法上是有有验证注解
        MethodDescriptor descriptor = beanDescriptor.getConstraintsForMethod(method.getName(), method.getParameterTypes());
        return descriptor != null && descriptor.hasConstrainedParameters() ? validator : null;
    } catch (NoSuchMethodException | MethodOverloadException e) {
        return null;
    }
}
 

/**
 * Only accepts if method isn't parameterless and have at least one constraint.
 */
private boolean hasConstraints(ControllerMethod controllerMethod) {
	Method method = controllerMethod.getMethod();
	if (method.getParameterTypes().length == 0) {
		logger.debug("method {} has no parameters, skipping", controllerMethod);
		return false;
	}
	BeanDescriptor bean = bvalidator.getConstraintsForClass(controllerMethod.getController().getType());
	if(bean == null) {
		return false;
	}
	MethodDescriptor descriptor = bean.getConstraintsForMethod(method.getName(), method.getParameterTypes());
	return descriptor != null && descriptor.hasConstrainedParameters();
}