ServletContext和ServletContextListener的作用

http://blog.csdn.net/jiben071/article/details/6024655

 

ServletContext使用理解

https://www.cnblogs.com/danielFF/p/6730793.html

 

ServletContextListener的作用

https://www.cnblogs.com/homesea/p/4709403.html

 

一个简单的ServletContextListener示例

https://www.cnblogs.com/moonlightpoet/p/5617478.html

 

context，listener，filter，servlet加载顺序

http://uule.iteye.com/blog/2051817

 

ServletContext 与application的异同

http://blog.csdn.net/jethai/article/details/52345124