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org.springframework.beans.factory.support DefaultSingletonBeanRegistry
- singletonObjects
Map<String, Object>完整单例 - earlySingletonObjects
Map<String, Object>初始化未完成, 早期对象, 提前暴露 - singletonFactories
Map<String, ObjectFactory<?>>单例工厂, 用于包装, 如 AOP 等