Interview_Spring/Springboot/MVC/AOP

✅ What is Spring?

• open source application framework for JAVA
• Java platform that provides comprehensive infrastructure support for developing Java applications
• can build applcations from POJOs
• uses AOP, DI

Spring 🆚 Springboot

• Springboot: sub project to set up project in spring
• built on top of the conventional spring framework
• provides all features of spring + easier to use than spring
• everything is auto configured!
• very useful to develop REST API
• used to develop microservies, fast
• run in independent container
• embedded tomcat run automatically

💡 https://www.geeksforgeeks.org/difference-between-spring-and-spring-boot/

✅ MVC Design Pattern?

• useful pattern for code reuseability
• Model, View, Controller
  • Model: buisness logic, database
  • View: show users
  • Controller: connect Model and View to exchange data

💡 https://soheeparklee.github.io/posts/spring-mvc/

MVC 1 🆚 MVC 2

• MVC1: JSP manages both controller & view
  • JSP안에서 로직 처리를 위해 자바 코드 사용
• MVC2: controller and view seperate
  • create Servelt to divide work
  • JSP manage View, Servlet manage Controller

Filter 🆚 Interceptor

• Filter: filter HTTP request, response in servlet container
• Interceptor: after filter, filter pre-processing duties

✅ Dispatcher Servelt?

• front controller that handles all HTTP requests

✅ AOP?

• define cross cutting concerns into seperate unit called aspect
• can modularize

• for logging, transaction, security

• advice: when
• join point: where
• point cut: where
• weaving: apply aspect to target code

💡 https://soheeparklee.github.io/posts/Spring_3DI_IOC/