在web.xml中配置一个注册servlet

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
    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_3_0.xsd">


<!-- 注册 -->
<servlet>
<!-- 配置类名 -->
<servlet-name>RegistServlet</servlet-name>
<!-- 配置类所在路径 -->
<servlet-class>cn.com.hc.servlet.RegistServlet</servlet-class>
</servlet>
<servlet-mapping>
<!-- 配置类名 -->
<servlet-name>RegistServlet</servlet-name>
<!-- 配置类名 -->
<url-pattern>/RegistServlet</url-pattern>
</servlet-mapping>
</web-app>