【Java 27 岁】Spring中三级缓存以及循环依赖问题解决方案

一级二级三级缓存 目标类在哪

DefaultSingletonBeanRegistryprivate final Map<String, Object> singletonObjects = new ConcurrentHashMap(256);   1级    private final Map<String, ObjectFactory<?>> singletonFactories = new HashMap(16);    3级    private final Map<String, Object> earlySingletonObjects = new HashMap(16);   2 级