I don't want to say that is not necessary knowing design patterns. I just want to tell you my experience.
I've used Spring frameworks for four years and another frameworks (JSF, Mybatis, Hibernate, etc) in various projects where I've participated (I work as Java Developer). In all this time, I've used few design patterns. Knowing Design patterns haven't been necessary for building medium and inclusive large java web applications.
It's a few shameful saying that I only have used MVC, DAO and Factory patterns. Maybe, other two more...but I don't remember
I'm awareness that It's no good and I should improve (I'm trying to learn more about design patterns).
Firstly, I would like if someone has had the same experience that me. Secondly, if could you give information about Use of design patterns with frameworks Java (This is because is almost impossible I leave to use Java frameworks but I know I need to use design patterns for good practice).