web.xml分发器:
case1: springMvc的分发器:
作用:将匹配上的请求交由springMvc处理,路径会继续到达springMvc的处理器映射器
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/*-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet> <servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
case2: 自定义servlet分发器:
作用:在自己的servlet中可以自由处理,web.xml的url优先匹配已定义的pattern,最后匹配<url-pattern>/</url-pattern>
<servlet>
<servlet-name>Func1</servlet-name>
<servlet-class>com.softroad.fun1.action.Func1_Servlet</servlet-class>
</servlet> <servlet-mapping>
<servlet-name>Func1</servlet-name>
<url-pattern>/Func1/*</url-pattern>
</servlet-mapping>
web.xml过滤器:
自定义过滤器:拦截请求、验证权限、文件加密或者解密
<filter>
<filter-name>Filter1</filter-name>
<filter-class>com.softroad.filter.Login_Filter</filter-class>
</filter> <filter-mapping>
<filter-name>Filter1</filter-name>
<url-pattern>/Func2/*</url-pattern>
</filter-mapping>