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Design & Development of Web Applications using SpringMVC


Design & Development of Web Applications using SpringMVC

Design & Development of Web Applications using SpringMVC

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  • 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