title: spring aop proxy object
body: <p>I'm now reading a Spring book written in Korean language and my English is bad. Please understand it.</p>
  
  <p>In the book, it says Spring's AOP initiates class using Dynamic proxy if it uses Interface and it uses CGLIB to initiate class in case of not using Interface.
  I don't clearly understand what it means. could you help me understand its deep meaning.</p>
  
  <p>I don't know this question is silly or not. but I'm just curious THX.</p>