?常用的web.xml的配置说明
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
??? xmlns="http://java.sun.com/xml/ns/j2ee"
??? xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
??? xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
??? http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
? <welcome-file-list>? --欢迎页，即默认页的文件列表
??? <welcome-file>index.jsp</welcome-file>
? </welcome-file-list>
?
?? <context-param>??? --项目级的初始参数，通过application即ServletContext的getInitParameter()方法获取
?? <param-name>test</param-name>
?? <param-value>testtest</param-value>
?? </context-param>
??
?? <error-page> --默认的错误页
?? <error-code>404</error-code> --条件为错误号404时(文件名出错)
?? <location>/index.jsp</location>
?? </error-page>
??
??
?? <error-page>
?? <exception-type>java.lang.NullPointerException</exception-type>? --异常类型，指定的异常类
?? <location>/err.jsp</location>
?? </error-page>
??
??? <listener> -- 临听器类
??? <listener-class>
??????? web.function.SessionCounter
??? </listener-class>
??? </listener>
? <servlet>? -- Servlet的初始化
??? <description>This is the description of my J2EE component</description>
??? <display-name>This is the display name of my J2EE component</display-name>
??? <servlet-name>MyServlet</servlet-name>
??? <servlet-class>servlet.demo.MyServlet</servlet-class>
??? <init-param>
??? <param-name>myarg</param-name>
??? <param-value>1</param-value>
??? </init-param>
? </servlet>
???
? <servlet-mapping>? -- Servlet的映射
??? <servlet-name>MyServlet</servlet-name>
??? <url-pattern>/servlet/MyServlet</url-pattern>
? </servlet-mapping>
?
?
? <icon>? -- 站点图标
????? <large-icon></large-icon>
????? <small-icon></small-icon>
? </icon>
? <filter>? -- 站点过滤器
? <filter-name>myfilter</filter-name>
? <filter-class>com.opensymphony.module.sitemesh.filter.PageFilter</filter-class>
? </filter>
? <filter-mapping>-- 过滤器的映射
? <filter-name>myfilter</filter-name>
? <url-pattern>/*</url-pattern>
? </filter-mapping>
?
? <session-config>? -- 会话的设置
? <session-timeout>10</session-timeout>
? </session-config>
?
?
?
?
</web-app>
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/fzmatthew/archive/2008/09/18/2943400.aspx