Setter DI vs. Constructor DI in Spring?

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When it comes to Spring specific pros and cons:

  • Constructor injection (from the definition) does not allow you to create circular dependencies between beans. This limitation is actually an advantage of constructor injection – Spring can resolve circular dependencies when setter injection is used without you even noticing.

  • On the other hand if you use constructor injection CGLIB is not able to create a proxy, forcing you to either use interface-based proxies or a dummy no-arg constructor. See: SPR-3150

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