Describe the Spring Bean lifecycle basics?

Every Spring bean moves through a predictable sequence of stages between creation and destruction, and the container exposes hook points at several of them for custom logic.

flowchart TD
    A[Instantiate bean] --> B[Populate properties / inject dependencies]
    B --> C[BeanNameAware, BeanFactoryAware callbacks]
    C --> D[BeanPostProcessor - before init]
    D --> E["@PostConstruct / afterPropertiesSet"]
    E --> F[BeanPostProcessor - after init]
    F --> G[Bean ready for use]
    G --> H["@PreDestroy / destroy on context close"]

Constructor injection happens first, followed by any setter or field injection. Then Spring calls Aware interfaces if implemented, runs BeanPostProcessors before and after any @PostConstruct method, and finally the bean sits ready until the container shuts down and calls @PreDestroy - only for singleton beans, since prototype beans aren't tracked for destruction.

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