Servlet容器中先执行Filter后执行Servlet是怎么实现的

 

org.apache.catalina.core.ApplicationFilterChain#internalDoFilter

 

filter.doFilter(request, response, this);

this是ApplicationFilterChain

 

 

增加一个Filter，则Filters总数n增加1

org.apache.catalina.core.ApplicationFilterChain#addFilter