How to tell if user is submitting a form with changed values, in a Spring MVC-based webapp?
@Override
public int hashCode() {
    return Objects.hashCode(this.field1, this.field2, etc.);
}

public static boolean hasFormChanged(Object form1, Object form2) {
    return HashCodeBuilder.reflectionHashCode(form1) != HashCodeBuilder.reflectionHashCode(form2);
}