ServletConfigInterceptor 总结

An interceptor which sets action properties based on the interfaces an action implements. For example, if the action implements ParameterAware then the action context's parameter map will be set on it.

This interceptor is designed to set all properties an action needs if it's aware of servlet parameters, the servlet context, the session, etc. Interfaces that it supports are:

• ServletContextAware
• ServletRequestAware
• ServletResponseAware
• ParameterAware
• RequestAware
• SessionAware
• ApplicationAware
• PrincipalAware

 这个连接器是用来设置参数的

自己的action继承了上面的几个接口，那么你所需的参数就会被设置到你的action中