servlet

一：分类

1、普通servlet

2、filter

3、listener

二：获取参数

1、application参数：

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>

/WEB-INF/xfire-servlet.xml,classpath:applicationContext.xml,

/WEB-INF/conf/beans/**/*.xml

</param-value>

</context-param>

servletContext.getInitParameter......

上下文参数:

  <init-param>

     <param-name>forceEncoding</param-name>

     <param-value>true</param-value>

   </init-param>

  普通servet:config.getInitParameter.......

  fiter:filterConfig.getInitParameter