seniorSpring
What is Spring Boot internal proxy creation mechanism?
Updated May 17, 2026
Short answer
Spring creates proxies using JDK dynamic proxies or CGLIB for AOP features.
Deep explanation
Spring uses JDK proxies when interfaces exist, otherwise CGLIB subclassing is used. Proxies enable features like @Transactional, @Async, and @Cacheable by intercepting method calls at runtime.
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