急!!!JSP中怎么配置web.xml文件?
我想请教大家,在开发一个JSP网页时,怎么在Tomcat中配置一个web.xml文件呀?它有具体的格式吗?在web.xm中l是不是有一些必选的元素啊?我参考了其它一些web.xml文件,发现它们的内容格式不怎么相同呀.
比如:在D:\Program Files\Tomcat 6.0\conf中,它的内容是:
...................<servlet>
<servlet-name>jsp</servlet-name>
<servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
<init-param>
<param-name>fork</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>xpoweredBy</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>3</load-on-startup>
</servlet>............. <mime-mapping>
<extension>bcpio</extension>
<mime-type>application/x-bcpio</mime-type>
</mime-mapping>等内容.
而在D:\Program Files\Tomcat 6.0\webapps\ROOT\WEB-INF目录下的内容是:
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>Welcome to Tomcat</display-name>
<description>
Welcome to Tomcat
</description>
</web-app>
搞不懂呀?