惰性初始化的 Spring 默认行为

Question

我是spring的初学者，ESP控制反转。我很困惑理解以下之间的区别

 <bean id="demo" class="Demo" lazy-init="false"/>
 <bean id="demo" class="Demo" lazy-init="true"/>
 <bean id="demo" class="Demo" lazy-init="default"/>

据我了解:lazy-init=false 在启动时创建 bean，而 lazy-init=true 不在启动时创建 bean，而是根据对特定 bean 的请求创建 bean。在这里纠正我，如果我的解释是错误的。

lazy-init 的默认行为到底是什么？它将如何实例化？

Answer 1

默认行为是假的:

By default, ApplicationContext implementations eagerly create and configure all singleton beans as part of the initialization process. Generally, this pre-instantiation is desirable, because errors in the configuration or surrounding environment are discovered immediately, as opposed to hours or even days later. When this behavior is not desirable, you can prevent pre-instantiation of a singleton bean by marking the bean definition as lazy-initialized. A lazy-initialized bean tells the IoC container to create a bean instance when it is first requested, rather than at startup.

I suggest reading up