How Dependency Injection Works Under the Hood in Spring

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2026-09-10 06:36:27 - Translate

Dependency Injection is one of those concepts every Java developer uses long before they understand what's actually happening beneath it. You annotate a field or constructor, Spring quietly hands you a fully wired object, and the application just works. But behind that simplicity is a surprisingly intricate machine involving reflection, proxies, and a carefully orchestrated container lifecycle....

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