FormModelMethodArgumentResolver.java 文件源码

protected void validateComponent(WebDataBinder binder, MethodParameter parameter) throws BindException {

    boolean validateParameter = validateParameter(parameter);
    Annotation[] annotations = binder.getTarget().getClass().getAnnotations();
    for (Annotation annot : annotations) {
        if (annot.annotationType().getSimpleName().startsWith("Valid") && validateParameter) {
            Object hints = AnnotationUtils.getValue(annot);
            binder.validate(hints instanceof Object[] ? (Object[]) hints : new Object[] {hints});
        }
    }

    if (binder.getBindingResult().hasErrors()) {
        if (isBindExceptionRequired(binder, parameter)) {
            throw new BindException(binder.getBindingResult());
        }
    }
}