Jsp&Servelet 学习笔记-创建一个部署描述文件

1.5创建一个部署描述文件

·为你的servlets注册并且创建一个url mapping
·注册并指定应用中的监听器和过滤器
·指定上下文中的初始化参数。
·配置错误页，和欢迎页
·配置seeion 超时


<?xml version="1.0" encoding="ISO-8859-1"?>


<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-application_2_3.dtd">


<web-app>


<display-name>Servlet 2.3 deployment descriptor</display-name>


<filter>


<filter-name>RequestFilter</filter-name>


<filter-class>com.mydev.RequestFilter</filter-class>


</filter>


<filter-mapping>


<filter-name>RequestFilter</filter-name>


<url-pattern>/*</url-pattern>


</filter-mapping>


<listener>


<listener-class>com.mydev.ReqListener</listener-class>


</listener>


<servlet>


<servlet-name>MyServlet</servlet-name>


<servlet-class>com.mydev.MyServlet</servlet-class>


</servlet>


<servlet-mapping>


<servlet-name> MyServlet </servlet-name>


<url-pattern>/myservlet</url-pattern>


</servlet-mapping>


<session-config>


<session-timeout>15</session-timeout>


</session-config> <error-page>


<error-code>404</error-code>


<location>/err404.jsp</location>


</error-page>


</web-app>