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	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#类加载器详解
	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#回顾一下类加载过程
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	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#类加载器总结
	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#双亲委派模型
	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#双亲委派模型介绍
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	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#双亲委派模型实现源码分析
	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#双亲委派模型的好处
	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#如果我们不想用双亲委派模型怎么办
issue871	https://github.com/Snailclimb/JavaGuide/issues/871
	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#自定义类加载器
	https://github.com/NullPointerException-0/JavaGuide/blob/main/docs/java/jvm/classloader.md#推荐阅读
https://blog.csdn.net/xyang81/article/details/7292380	https://blog.csdn.net/xyang81/article/details/7292380
https://juejin.im/post/5c04892351882516e70dcc9b	https://juejin.im/post/5c04892351882516e70dcc9b
http://gityuan.com/2016/01/24/java-classloader/	http://gityuan.com/2016/01/24/java-classloader/
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