已经报废了一年多的电脑，今天特么突然开机了，吓老子一跳，只见电脑管家缓缓地出来了，本次开机一共用时一年零六个月，打败了全国0%的电脑，电脑管家已经对您的电脑失去信心，然后它把自己卸载了，只剩我在一旁发呆。
路漫漫其修远兮，吾将上下而求索！
github：https://github.com/youzhibing
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shiroFilter的注册此篇博文讲到了springboot的filter注册，但只是filter注册的一种方式：通过FilterRegistrationBean实现。而Shiro Filter的注册是采用另外的方式实现的，我们接着往下看
ShiroFilterFactoryBean实现了FactoryBean，我们来看下ShiroFilterFactoryBean对FactoryBean的getObject方法的实现
git图一
可以看到createInstance()返回的是SpringShiroFilter的实例；SpringShiroFilter的类图如下
getObject方法只是创建了一个SpringShiroFilter实例，并注册到了spring容器中，那是如何注册到servlet容器的呢？我们来跟下源码
这篇博文其实涉及到了，只是那时候没细讲，我们还是从那里开始
gif图二
ServletContextInitializerBeans.java的构造方法，里面有addServletContextInitializerBeans(beanFactory)方法和addAdaptableBeans(beanFactory)，我们来好好瞅一瞅
addServletContextInitializerBeans(beanFactory)
private void addServletContextInitializerBeans(ListableBeanFactory beanFactory) { for (Entry<String, ServletContextInitializer> initializerBean : getOrderedBeansOfType( beanFactory, ServletContextInitializer.class)) { addServletContextInitializerBean(initializerBean.getKey(), initializerBean.getValue(), beanFactory); } } private void addServletContextInitializerBean(String beanName, ServletContextInitializer initializer, ListableBeanFactory beanFactory) { if (initializer instanceof ServletRegistrationBean) { Servlet source = ((ServletRegistrationBean<?>) initializer).getServlet(); addServletContextInitializerBean(Servlet.class, beanName, initializer, beanFactory, source); } else if (initializer instanceof FilterRegistrationBean) { Filter source = ((FilterRegistrationBean<?>) initializer).getFilter(); addServletContextInitializerBean(Filter.class, beanName, initializer, beanFactory, source); } else if (initializer instanceof DelegatingFilterProxyRegistrationBean) { String source = ((DelegatingFilterProxyRegistrationBean) initializer) .getTargetBeanName(); addServletContextInitializerBean(Filter.class, beanName, initializer, beanFactory, source); } else if (initializer instanceof ServletListenerRegistrationBean) { EventListener source = ((ServletListenerRegistrationBean<?>) initializer) .getListener(); addServletContextInitializerBean(EventListener.class, beanName, initializer, beanFactory, source); } else { addServletContextInitializerBean(ServletContextInitializer.class, beanName, initializer, beanFactory, initializer); } }