pyexr2f4a/WebContent/WEB-INF/web.xml

<?xml version="1.0" encoding="UTF-8"?>
<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_4_0.xsd"
         version="4.0">
    <servlet>
        <servlet-name>StudentServlet</servlet-name>
        <servlet-class>com.demo.StudentServlet</servlet-class>
    </servlet>
    

    <servlet-mapping>
        <servlet-name>StudentServlet</servlet-name>
        <url-pattern>/addStudent.jsp</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>/addStudent.jsp</welcome-file>
    </welcome-file-list>

        <servlet>
            <servlet-name>addServlet</servlet-name>
            <servlet-class>com.action.addServlet</servlet-class>
        </servlet>
    
    <servlet-mapping>
        <servlet-name>addServlet</servlet-name>
        <url-pattern>/StudentAdd.jsp</url-pattern>
    </servlet-mapping>

</web-app>