java - sprin加载完xml，初始化好bean之后，怎么保证初始化好的bean始终被引用的，也就是说怎么保证不被垃圾回收机制回收

Answer 1

You can simplify spring:

//简化成下面这样，具体可以去看spring源码
Map<String, Object> applicationContext

In the default Singleton mode, after loading the xml, the instantiated object has been referenced by the ApplicationContext and will not be recycled during the spring life cycle

Answer 2

Initialized beans are maintained in a map, and this map is final修饰，这样map就作为了一个GC ROOT对象，jvm采用的可达性分析算法