How can I inject dependencies into self-instantiated objects in Spring?

Dependency Injection for Self-Instantiated Objects in Spring

When creating instances of Spring-managed classes without using the Spring context (e.g., new MyClass()), it may be necessary to manually inject dependencies into those objects.

Solution Using AutowireCapableBeanFactory

Spring provides the AutowireCapableBeanFactory to address this scenario. By autowiring your beanFactory, you can inject dependencies into any arbitrary object:

<code class="java">@Autowired
private AutowireCapableBeanFactory beanFactory;

// Later in your code:
MyBean obj = new MyBean();
beanFactory.autowireBean(obj);</code>

After this, obj will have its dependencies automatically injected, as if it had been created by the Spring context.

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