ServletConfig对象和它在开发中的应用场

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 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"> <display-name></display-name>
<servlet>
<servlet-name>ServletDemo</servlet-name>
<servlet-class>cn.itcast.ServletDemo</servlet-class>

<init-param>
<param-name>data1</param-name>
<param-value>xxxxxx</param-value>
</init-param>
<init-param>
<param-name>data2</param-name>
<param-value>yyyyy</param-value>
</init-param>
<init-param>
<param-name>data3</param-name>
<param-value>dddddd</param-value>
</init-param>
<init-param>
<param-name>data4</param-name>
<param-value>aaaaaa</param-value>
</init-param>
</servlet>

<servlet-mapping>
<servlet-name>ServletDemo</servlet-name>
<url-pattern>/servlet/ServletDemo</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>