Web.xml demo

Author: AndriiPiatakha

online-store.web/src/main/java/com/itbulls/learnit/onlinestore/web/servlets/ContextParamValueServlet.java

@@ -0,0 +1,18 @@
+package com.itbulls.learnit.onlinestore.web.servlets;
+
+import jakarta.servlet.http.HttpServlet;
+import java.io.IOException;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+@WebServlet("/context-param")
+public class ContextParamValueServlet extends HttpServlet {
+	
+	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+		response.getWriter().println("Context param: " + getServletContext().getInitParameter("contextParam"));
+	}
+
+
+}

online-store.web/src/main/webapp/WEB-INF/web.xml

@@ -1,15 +1,61 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
-  <display-name>onlinestore</display-name>
-  <welcome-file-list>
-    <welcome-file>index.html</welcome-file>
-    <welcome-file>index.htm</welcome-file>
-    <welcome-file>index.jsp</welcome-file>
-    <welcome-file>default.html</welcome-file>
-    <welcome-file>default.htm</welcome-file>
-    <welcome-file>default.jsp</welcome-file>
-  </welcome-file-list>
-  
-  
-  
+<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns="http://xmlns.jcp.org/xml/ns/javaee"
+	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
+http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
+	id="WebApp_ID" version="4.0">
+	<display-name>onlinestore</display-name>
+	<welcome-file-list>
+		<welcome-file>index.html</welcome-file>
+		<welcome-file>index.htm</welcome-file>
+		<welcome-file>index.jsp</welcome-file>
+		<welcome-file>default.html</welcome-file>
+		<welcome-file>default.htm</welcome-file>
+		<welcome-file>default.jsp</welcome-file>
+	</welcome-file-list>
+
+	<servlet>
+		<servlet-name>helloWorldServlet</servlet-name>
+		<servlet-class>com.itbulls.learnit.onlinestore.web.servlets.HelloWorldServlet</servlet-class>
+		<init-param>
+			<param-name>greetings</param-name>
+			<param-value>Hello World</param-value>
+		</init-param>
+		<load-on-startup>0</load-on-startup>
+	</servlet>
+
+	<servlet-mapping>
+		<servlet-name>helloWorldServlet</servlet-name>
+		<url-pattern>/hello-world</url-pattern>
+	</servlet-mapping>
+
+	<context-param>
+		<param-name>contextParam</param-name>
+		<param-value>Context Param Value</param-value>
+	</context-param>
+
+	<security-constraint>
+		<web-resource-collection>
+			<web-resource-name>test-auth</web-resource-name>
+			<url-pattern>/test-auth</url-pattern>
+			<http-method>GET</http-method>
+		</web-resource-collection>
+		<auth-constraint>
+			<role-name>client</role-name>
+		</auth-constraint>
+
+		<user-data-constraint>
+			<!-- transport-guarantee can be CONFIDENTIAL, INTEGRAL, or NONE -->
+			<transport-guarantee>NONE</transport-guarantee>
+		</user-data-constraint>
+	</security-constraint>
+
+	<login-config>
+		<auth-method>BASIC</auth-method>
+	</login-config>
+
+	<session-config>
+		<session-timeout>15</session-timeout>
+	</session-config>
+
 </web-app>