Java Servlet之在web容器里注册Servlet

<?xml version="1.0"?>
<web-app     xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
 http://xmlns.jcp.org/xml/ns/javaee/web-app_3_0.xsd" 
version="3.0">

<welcome-file-list>
<welcome-file>/MyFirstServlet</welcome-file>
</welcome-file-list>

<servlet>
<servlet-name>MyFirstServlet</servlet-name>
<servlet-class>com.howtodoinjava.servlets.MyFirstServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MyFirstServlet</servlet-name>
<url-pattern>/MyFirstServlet</url-pattern>
</servlet-mapping>

</web-app>