Spring - Part 4 - Spring MVC

Java Spring Training Spring MVC

Classification: Restricted Review • Spring framework • Inversion of Control • Dependency Injection – Two types • Defining beans using XML • Inheriting beans • Auto-wiring • Annotations based configuration • Java based configuration • Spring AOP

Classification: Restricted Agenda • Spring MVC • Spring MVC – Hibernate Integration

Java & JEE Training Spring MVC

Classification: Restricted Spring MVC Step-by-step • Refer the official Spring documentation: https://docs.spring.io/docs/Spring-MVC-step-by-step/

Classification: Restricted MVC… • What is MVC pattern? Review… • The Model encapsulates the application data and in general they will consist of POJO. • The View is responsible for rendering the model data and in general it generates HTML output that the client's browser can interpret. • The Controller is responsible for processing user requests and building appropriate model and passes it to the view for rendering.

Classification: Restricted Spring MVC • Spring MVC tutorial provides an elegant solution to use MVC in Spring framework by the help of DispatcherServlet. • In Spring Web MVC, DispatcherServlet class works as the front controller. It is responsible to manage the flow of the Spring MVC application. • The @Controller annotation is used to mark the class as the controller in Spring 3. • The @RequestMapping annotation is used to map the request url. It is applied on the method.

Classification: Restricted Advantages of Spring 3.0 MVC • Supports RESTful URLs. • Annotation based configuration. • Supports to plug with other MVC frameworks like Struts etc. • Flexible in supporting different view types like JSP, velocity, XML, PDF etc.,

Classification: Restricted MVC – An overview Controller View Model Request Response

Classification: Restricted Spring MVC- Basic Architecture Dispatch erServlet (Front controller) HandlerMapping (Map of URL and controllers) Controller (Responsible to handle request) View (JSP, XML, Velocity) Model (POJO) Request 1 5 4 3 2 www.JAVA9S.c

Classification: Restricted Spring MVC Demo – Hello World • Basic Demo…

Classification: Restricted Spring MVC Annotations • @Controller • @RequestMapping • @RequestParam • @PathVariable • @ResponseBody

Classification: Restricted @RequestMapping with Class @Controller @RequestMapping("/home") public class HomeController { }

Classification: Restricted @RequestMapping with Method @RequestMapping(value="/student") @ResponseBody public String method0(){ return “some string"; }

Classification: Restricted @RequestMapping with Multiple URI @RequestMapping(value={"/student",“/student/sciencestudent"}) @ResponseBody public String method1(){ return “somestring"; }

Classification: Restricted @RequestMapping with HTTP Method @RequestMapping(value="/student", method=RequestMethod.POST) @ResponseBody public String method2(){ return “some string"; } @RequestMapping(value="/student2", method={RequestMethod.POST,RequestMethod.GET}) @ResponseBody public String method3(){ return “some string"; }

Classification: Restricted @RequestMapping with Headers @RequestMapping(value="/student", headers="name=Pawan") @ResponseBody public String method4(){ return “something"; } @RequestMapping(value="/method5", headers={"name=Pawan", "id=1"}) @ResponseBody public String method5(){ return “some return value"; }

Classification: Restricted @RequestMapping with @PathVariable @RequestMapping(value="/student/{id}") @ResponseBody public String method7(@PathVariable("id") int id){ return “the value with id="+id; }

Classification: Restricted @RequestMapping with @RequestParam for URL parameters @RequestMapping(value="/student") //e.g. http://....appname/student?id=111 @ResponseBody public String method9(@RequestParam("id") int id){ return “student with id= "+id; }

Classification: Restricted @RequestMapping fallback method (404) @RequestMapping("*") @ResponseBody public String fallbackMethod(){ return "fallback method"; }

Classification: Restricted Spring – More Demo…. • Demo…

Classification: Restricted Topics to be covered in next session • Frontend development fundamentals HTML, CSS, JS, jQuery, AJAX

Classification: Restricted Thank you!

Spring - Part 4 - Spring MVC

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Spring - Part 4 - Spring MVC