In this session you will learn: 1. Spring framework 2. Inversion of Control 3. Dependency Injection – Two types 4. Defining beans using XML 5. Inheriting beans 6. Auto-wiring 7. Annotations based on a configuration 8. Java-based configuration 9. Spring AOP

1. Java & JEE Training
Session 46 – Spring MVC

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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

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Agenda
• Spring MVC
• Spring MVC – Hibernate Integration

4. Java & JEE Training
Spring MVC

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

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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.

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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.

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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.,

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MVC – An overview
Controller
View
Model
Request
Response

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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

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Spring MVC Demo – Hello World
• Basic Demo…

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Spring MVC Annotations
• @Controller
• @RequestMapping
• @RequestParam
• @PathVariable
• @ResponseBody

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

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

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

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@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";
}

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@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";
}

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

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@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;
}

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

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Spring – More Demo….
• Demo…

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

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Thank you!