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都有哪些 bean scope?

  • singleton: Return a single bean instance per Spring IoC container+

  • prototype: Return a new bean instance each time when requested

  • request: Return a single bean instance per HTTP request

  • session: Return a single bean instance per HTTP session

  • global-session: Return a single bean instance per global HTTP session

默认的是 singleton

Bean Factory 与 ApplicationContext 的区别?
Singleton bean 是线程安全的吗?
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Java 面试笔记

Java

多态 Polymorphism

Static 关键字

int 与 integer

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