"Welcome To Ashok IT"				
			                  "Spring Boot and MicroServices"
                                            Topic  : Spring Boot MVC
                                             Date  : 09/05/2025
                                                (Session - 43)                               
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Steps for Developing the First WebApplication using Spring MVC
==============================================================
Step-1 :
=======
* Download and install the ApacheTomcat10 version from below url 
 
    https://tomcat.apache.org/download-90.cgi  >>>> select installer service (32-bit/64-bit Windows Service Installer (pgp,                                                                                sha512))

    During the installation change the tomcat server port no from 8080 to 1234

    During the installation remember the username & password for tomcat manager i.e.,admin/admin.

Step-2 : Adding Tomcat Server into STS IDE
==========================================
* Open the STS IDE and Navigate to "Window" Menu >>>> Again Select "Show View" >>> Again select "Others" and Find "Server"     >> select "Servers" Option and server window will appear.

* Under the Server Section need to Add the Server by clicking on Hyperlink and select "Apache" >>> Find "TomcatV9.0 Server"
  >>> Click on "Next" >> Point the Apache Tomcat Server 10.1 Location >>> Click on "Finish" button.

Step-3 : Creating Project in STS IDE
====================================
 * Open STS IDE and create new Maven project by checking checkbox of skiping the archetype selection

 * Provide below values for artifacts co-ordinates
  
     GroupId : com.ashokit

     ArtifactId :28_SpringMVC_WebApp

     package :com.ashokit

 * Click on  "Finish" Button and then project will be created succesfully in STS IDE.

NOTE
====
 * If the below folders are missing in the Maven Project create the folder as below steps

 * Righ Click on Project folder>>> Select option as "Build Path" >>> Again select "New Source Folder" >>> Provide name as 
   "src/main/java" & "src/main/resource".

Step-4 : Configuring the DispatcherServlet in web.xml
=====================================================
web.xml
=======
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns = "https://jakarta.ee/xml/ns/jakartaee"
         xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation = "https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd"
         version = "5.0">
  <display-name>AshokITFirstWebApplication</display-name>
    <servlet>
        <servlet-name>ashokit</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>ashokit</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

NOTE
====
* We enabled load on startup with positive value for DispatcherServlet and will create an object during the server startup     time itself.

* We configured the URl pattern as "/" representing will accept any kind of request by DispatcherServlet.

Step-5 : Creating Controller class in Spring MVC
================================================
* Create a Java Class and add the annotation as @Controller will becomes as spring bean class in spring mvc.

WelcomeController.java
======================
package com.ashokit.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class WelcomeController {
	
	
	//adding request Processor Method for welcome Message
	@RequestMapping(value = "welcome")
	public ModelAndView getWelcomeMessage() {
		
		ModelAndView mav = new ModelAndView("welcome"); 
		mav.addObject("wishMessage", "Welcome To AshokIT For Spring MVC WebAplication Development");
		
		return mav;
		
	}
}


Step-6 : Spring Configuration File
==================================
* A DispatcherServlet will automaticaly load/read spring configuration file if the following two conditions
  are satisfied.

  1) File name should be "servlet-name-servlet.xml" (spring configuration file(ashokit-servlet.xml))
  2) The file must be placed in "WEB-INF Folder".

* If the above conditions are failed need to configure the extra configuration in web.xml

Example
=======
<servlet>
    <servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/config/web-application-config.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

ashokit-servlet.xml
===================
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    
     <!--Enabling component scan feature-->
     <context:component-scan base-package="com.ashokit"/>
     
      <!--configuring the ViewResolver-->
      <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/views/"></property>
        <property name="suffix" value=".jsp"></property>
      </bean>
</beans>

Step-7 : Creating the View
==========================
* Right click on "webapp" folder and add the new folder as  "views".

* After creating the above folder then create a new file with name as "welcome.jsp" as below

welcome.jsp
===========
<%@ page isELIgnored="false" %>
<html>
  <body bgcolor="cyan">
     <div>${wishMessage}</div>
  </body>
</html>

Step-8: pom.xml
===============
<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
						https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.ashokit</groupId>
	<artifactId>28_SpringMVC_WebApplication</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>17</maven.compiler.source>
		<maven.compiler.target>17</maven.compiler.target>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>6.0.11</version>
		</dependency>
		<dependency>
			<groupId>jakarta.servlet</groupId>
			<artifactId>jakarta.servlet-api</artifactId>
			<version>5.0.0</version>
			<scope>provided</scope>
		</dependency>
	</dependencies>
</project>

Step-9 : Run the Application
============================
* Right click on Project and choose "Run As" option >>> again select  "Run As Server".

* Right click on Added server in server section >>>> Select option as "start" and server will start & deployed successfully.

* Onces server got started open your favourite browser and hit request with below url
   
    http://localhost:2345/26_SpringMvc_WebApp/wishMessage

OUTPUT
=====
Welcome To AshokIT For Spring MVC WebAplication Development

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

We Will see how to send the data to the Request Processor Method
=================================================================
* Inorder to send the data from client to Server we have multiple sources

1) Adding key-value pairs to the browser Request URL
====================================================
   http://localhost:8080/27_SpringMVC_App/welcome >>>>>>>>>>>>> Sending Blank Request to Server without having any data
 
   http://localhost:8080/27_SpringMVC_App/welcome?username=mahesh >>>>> Sending Request to Server with One Parameter.

           http -------> Protocal

           localhost -----> Current Machine

           8080 --------> portno

           27_SpringMVC_App ----------> WebApplication Name

           welcome--------> URL Pattern

           username=mahesh -----------> Request Parameters(username(key),mahesh(value))

    http://localhost:8080/27_SpringMVC_App/welcome?username=mahesh&city=Hyderabad >>>>> Sending Request to Server with 												      Multiple Parameters.

           ?username=mahesh&city=Hyderabad >>>>>>>> QueryString(Request parameters)

           RequestParameter Names :username,city

           RequestParameter Values : mahesh,Hyderabad


        Reading the Request Parameters in the RequestProcessor method of Controller class
        =================================================================================
        1) Gathering All Request Parameters into Map Object by using annotation called @RequestParam.

              public String processLogin(@Requestparam Map<String,String> requestParams) {


              }

         2) Gathering the Request Parameter independently 

              public String processLogin(@RequestParam("username") String uname,
                                         @RequestParam("city") String cityName){



             }

     Problems
     =======
     1) It is not recommended for sending data via URL because its not good practise sending sensitive information in URL.

     2) It is not enduser friendly approach.


2) Sending Data to Server using Html Forms
==========================================
 * As programmer we need to send one Html form to the user browser.

 * User has to fill the form with proper data and submit that form.

 * Onces form got submitted by the user the data of form will sent to Server as Request Parameters(or) Request Body

Example Application 
===================
* We will develop two Request Processor methods 

   1) Request processor method is for rendering the Html Form  i.e., welcome page.

   2) Request Processor method is for processing the Html Form Data.


enquiry.jsp
===========
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>registration.jsp</title>
</head>
<body>
	<div style='text-align: center; color: red;margin-bottom:8px;'>Welcome To AshokIT
		For Spring MVC Application Development...</div>
	<form action="sendEnquiry" method="post">
		<table align="center">
			<tr>
				<td>Name</td>
				<td><input type="text" name="firstName" /></td>
			</tr>
			<tr>
				<td>EmailID</td>
				<td><input type="text" name="emailId" /></td>
			</tr>
			<tr>
				<td>ContactNo</td>
				<td><input type="text" name="contactNo" /></td>
			</tr>
			<tr>
				<td>Course</td>
				<td><select name="courses">
						<option value=""></option>
						<option value="Angular">AngularJS</option>
						<option value="React">ReactJS</option>
						<option value="SpringBoot">Spring Boot Framework</option>
						<option value="Microservices">Microservices</option>
						<option value="Aws">AWS</option>
						<option value="Devops">Devops</option>
				</select></td>
			</tr>
		</table>
		<div style="text-align: center;margin-top:8px;">
			<input type="submit" value="Send Enquiry" />
		</div>
	</form>
</body>
</html>



confirmation.jsp
================
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>confirmation.jsp</title>
</head>
<body>
   <div style='text-align:center'>
   		<div>Student Name  : <span>${enquiryInfo.firstName}</span></div>
   		<div>Course Name  : <span>${enquiryInfo.courses}</span></div>
   		<div>Your Enquiry is Received for above Details Admin Team will connect with you shortly.....</div>
   </div>
</body>
</html>


EnquiryController.java
======================
package com.ashokit.controller;

import java.util.Map;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class EnquiryController {
	
	@RequestMapping("/")
	public ModelAndView getEnquiryPage() {
		return new ModelAndView("enquiry");
	}
	
	@RequestMapping(value="sendEnquiry",method = RequestMethod.POST)
	public ModelAndView processEnquiryDetails(@RequestParam Map<String,String> formData) {
		ModelAndView mav = new ModelAndView("confirmation");
		mav.addObject("enquiryInfo", formData);
		return mav;
	}
}

web.xml
=======
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns = "https://jakarta.ee/xml/ns/jakartaee" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd" version = "5.0">
  <display-name>AshokITFormSubmission</display-name>
      <servlet>
        <servlet-name>ashokit</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>ashokit</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>


ashokit-servlet.xml
===================
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

       <!--Enabling component scan feature-->
     <context:component-scan base-package="com.ashokit"/>
     
      <!--configuring the ViewResolve-->
      <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/views/"></property>
        <property name="suffix" value=".jsp"></property>
      </bean>
</beans>

pom.xml
=======
<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.ashokit</groupId>
	<artifactId>29_SpringMVC_FormSubmission_App</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>17</maven.compiler.source>
		<maven.compiler.target>17</maven.compiler.target>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>6.0.11</version>
		</dependency>
		<dependency>
			<groupId>jakarta.servlet</groupId>
			<artifactId>jakarta.servlet-api</artifactId>
			<version>5.0.0</version>
			<scope>provided</scope>
		</dependency>
	</dependencies>
</project>

OUTPUT
======
Request URL : http://localhost:1234/29_SpringMVC_FormSubmission_App/

Will load the enquiry form into browser

Fill the form with required details and submit form 

Acknowlege Message
==================

StudentName : Mahesh
StudentName : SpringBoot
Your Enquiry is Received for above Details Admin Team will connect with you shortly.....


Assignment
===========
* Completeing the Same Application and test this application form method as "get".

* Observe the Request URL in the Browser URL Bar...
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++