Monolithic Architecture: Frontend and Backend in the Same Layer

1. Add View Layer

Inside your src/main folder, create the following structure:

src/main/webapp
 └── WEB-INF
      └── view
           └── index.jsp

2. Configure View Resolver

In application.properties, tell Spring where to look for JSP files:

spring.mvc.view.prefix=/WEB-INF/view/
spring.mvc.view.suffix=.jsp

So, if a controller returns "index", Spring looks for /WEB-INF/view/index.jsp.

3. Implement MVC Architecture

• Controller : handles request
• View : JSP page for UI
• Model : data passed between controller and view

4. Add Tomcat JSP Support

• By default, embedded Tomcat in Spring Boot does not support JSP.

so add dependency ,also need JSTL (Java Standard Tag Library):

   <!-- https://mvnrepository.com/artifact/org.apache.tomcat.embed/tomcat-embed-jasper -->
   <dependency>
       <groupId>org.apache.tomcat.embed</groupId>
       <artifactId>tomcat-embed-jasper</artifactId>
       <version>11.0.7</version>
   </dependency>

   <!-- JSTL Support -->
   <dependency>
       <groupId>jakarta.servlet</groupId>
       <artifactId>jakarta.servlet-api</artifactId>
       <scope>provided</scope>
   </dependency>

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