Design & Development of Web Applications using SpringMVC

1. Design & Development
of Web Applications
using Spring MVC
by Naresh Chintalcheru

2. Spring MVC
Another Web MVC Framework?

3. Spring MVC
Another Web MVC Framework?
After learning Struts, JSF, DDUI …….
…………….. now Spring MVC ?

4. Spring MVC
● Benefit of using a Web Framework
● Removes the need of boilerplate code
● Gather HTTP Request Parameters
● Validation & Conversions
● Update the Model
● Standard code level design for multiple
applications in an enterprise
● Navigation Flow
● Validations

5. Spring MVC
● Benefit of using a Web Framework
● No Web Application Component Design
● Use Web Framework as Design Templates
and plugin the View, Model and Controllers

6. Spring MVC
● Benefit of using a Web Framework
● Speed up the development

7. Spring MVC
Web MVC Frameworks
● Struts
● JSF
● Wicket
● DDUI
● Spring MVC

8. Spring MVC
Presentation Layer Frameworks
● Web MVC Framework
● Template Framework
● View Technologies
● UI Widget Framework

9. Spring MVC
Template Frameworks
● Tiles
● Facelets
● SiteMesh
View Technologies
● JSP
● XHTML
● XSLT
UI Widget Frameworks
● JQuery
● DOJO
● SFX

10. Spring MVC
Why Spring MVC Framework?

11. Spring MVC
Spring MVC is a action-based or request-based
framework similar to Struts.
JSF is a component-based framework.

12. Spring MVC

13. Spring MVC

14. Spring MVC
Spring MVC vs JSF
● JSF is part of JEE Specification
● JSF is based on component architecture and
has learning curve
● Limited HTTP GET method support in JSF
● REST Web Services Support in Spring MVC.

15. Spring MVC
Spring MVC vs Struts
● Struts forces concrete Inheritance of
Action/ActionForm, taking away single shot of
Inheritance in Java.
● Spring MVC based on Interfaces and
Annotations.
● Spring MVC is truly view-agnostic. Many
options in View Technologies.
● Use Spring IoC Container from Presentation
Tier to Integration Tier.

16. Spring MVC
Spring MVC is only one module in the Spring Framework

17. Spring Framework Fundamentals

18. Spring Framework Fundamentals

19. Spring Framework Fundamentals
What is Spring Framework ?
● Spring Framework is …..
● Open Source Meta Framework
● Provides frameworks and container
● Simplify the development

20. Spring Framework Fundamentals
Spring framework is a Layered Architecture
Choose the modules needed and eliminate other
modules
All modules are built on the top of its core
container

21. Spring Framework
Benefits:
● Light Weight
● Promotes good OO design
● Container Agnostic Framework : Insulates the
application from its hosting container.

22. Spring Framework Fundamentals
Spring Has Two Web Frameworks
● Spring MVC
● Spring Web Flow

23. Spring Framework Fundamentals
Spring Framework Web Flow
● Secondary Page Flow logic framework
● Can be used with Spring MVC, JSF and
Struts.

24. Spring Framework Fundamentals
Spring MVC Request Flow ….

25. Spring MVC
Spring MVC

26. Spring MVC
Spring MVC

27. Spring MVC
Front Controller Design Pattern:
● DispatcherServlet is the Front Controller handles Client
Requests.
● ActionServlet in Struts
● FacesServlet in JSF
● AppServlet in DDUI

28. Spring MVC
Controller Design Pattern in MVC:
● Controllers are components that are being called by the
Dispatcher Servlet for performing page level logic and
delegate to Service Objects.
● Action Classes in Struts
● Managed Beans & Backed Beans in JSF
● PageProcessor in DDUI

29. Spring MVC
View Resolver & Navigation Logic:
● Resolves view names to views. Resolves navigation
logic from spring-mvc.xml
● Struts-config.xml in Struts
● Jsf-config.xml in JSF

30. Spring MVC
Developing App using Spring MVC:
● Step 1: web.xml : Front Controller
<web-app version="2.4">
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.*</url-pattern>
</servlet-mapping>
</web-app>

31. Spring MVC
Developing App using Spring MVC:
● Step 2: web.xml : ApplicationContext
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-mvc.xml</param-value>
</context-param>

32. Spring MVC
Developing App using Spring MVC:
● Step 3: spring-mvc.xml : Component Scan
<beans>
<context:component-scan base-package=“com.sf.web"/>
</beans>

33. Spring MVC
Developing App using Spring MVC:
● Step 4: Controller Classes
@Controller
public class EmployeeController {
@Autowired
private final EmployeeSO employeeSO;
@RequestMapping("/emplist")
public String empHandler(Model model) {
List empList = employeeSO.getAllEmp();
model.addAttribute(“empList”, empList);
return “ListEmpPage” ;
}
}

34. Spring MVC
Bean Validation Framework JSR-303:
public class Employee {
@NotNull
@Pattern(regexp = "[a-z-A-Z]*")
private String firstName;
@Size(min=2, max=15)
private String lastName;
@Past
private Date birthDate;
@Email (message=“Invalid Email “)
private String email;

35. Spring MVC
REST Web Services:
http://localhost:8080/SpringMVC/employee/John
@Controller @RequestMapping("/employee")
public class EmployeeController {
@RequestMapping( value="/{name}“ )
public String getEmp(@PathVariable String name, ModelMap
model) {
model.addAttribute(“emp", name);
return “EmpListPage";
}
}

36. Spring MVC
Question & Answers