class path and classloader

https://www.artima.com/insidejvm/ed2/linkmod5.html

https://www.artima.com/insidejvm/ed2/securityP.html

https://docs.oracle.com/javase/jndi/tutorial/beyond/misc/classloader.html

https://docstore.mik.ua/orelly/java-ent/security/ch03_01.htm

实例分析JVM安全体系：双亲委派、命名空间、保护域、策略

最详细的Java的ClassLoader机制讲解

https://www.ibm.com/developerworks/cn/java/j-lo-classloader/

https://www.javaworld.com/article/2077344/core-java/find-a-way-out-of-the-classloader-maze.html

http://www.tiantianbianma.com/java-classloader-detail.html/

https://blog.csdn.net/briblue/article/details/54973413