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Spring Web MVC
- 1. Java/J2ee Programming Training Spring Web MVC
- 2. Page 2Classification: Restricted Agenda • MVC • Spring MVC • Configuring web.xml • Creating Controller • Registering controller with dispatcher-servlet • Mapping requests to controller • Rendering response to View
- 3. Page 3Classification: Restricted MVC • Model • represents the business data • View • Web pages presented to the user • Controller • controls the flow of application
- 5. doGet() { Emp e = EDao.getEmp( 100 ); request.setAttribute(“emp”,emp); RequestDispatcher rd; Rd = req.getRequestDispatcher(“EmpVu.jsp”); Rd.forward(reques, response); } EmpVu.jsp Emp:100 submit Emp: 100 Fname:Jack Lname:Tom 4 5 1 2 3
- 6. doGet() { Emp e = EDao.getEmp( 100 ); request.setAttribute(“emp”,emp); RequestDispatcher rd; Rd = req.getRequestDispatcher(“EmpVu.jsp”); Rd.forward(reques, response); } EmpVu.jsp Emp:100 submit Emp: Fname: Lname: 4 5 1 2 3 Request emp Emp:100 Fname:Jack Lname:Tom response
- 7. doGet() { Emp e = EDao.getEmp( 100 ); request.setAttribute(“emp”,e mp); RequestDispatcher rd; Rd = req.getRequestDispatcher(“EmpVu.jsp”); Rd.forward(reques, response); } ${requestScope.emp.fname} ${requestScope.emp.lname} ${requestScope.emp.lname} Emp:100 submit Emp: 100 Fname:Jack Lname:Tom 1 2 3 response Request emp Rd.forward( req, resp);
- 8. Page 8Classification: Restricted Spring MVC • open for extension closed for modification • Pluggable View Technology: JSP, JSF, Velocity • Injection of services into controller: • removes code redundancy between business layer and presentation layer • Integration with other components: • integrates with other frameworks such as struts , hibernate, JSF
- 10. Page 10Classification: Restricted Configuring web.xml <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>*.htm</url-pattern> </servlet-mapping>
- 11. Creating Controller public class RegisterController extends AbstractController{ @Override protected ModelAndView handleRequestInternal(HttpServletRequest hsr, HttpServletResponse hsr1) throws Exception { ModelAndView mv = new ModelAndView("success"); mv.addObject("user", "John"); return mv; } }
- 12. Page 12Classification: Restricted Registering controller with dispatcher-servlet <bean id="registerController" class="controller.RegisterController"/>
- 13. Page 13Classification: Restricted Mapping requests to controller • BeanNameUrlHandlerMapping • SimpleUrlHandlerMapping • ControllerClassNameHandlerMapping
- 17. Page 17Classification: Restricted Mapping requests to controller <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping" > <property name="mappings"> <props> <prop key="index.htm">indexController</prop> <prop key="register.htm">registerController</prop> </props> </property> </bean>
- 18. Page 18Classification: Restricted Rendering response to View • Declare a view resolver • create a view to render the response • View Resolver: maps the logical name to actual view <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
- 19. Page 19Classification: Restricted Rendering response to View • Declare a view resolver • create a view to render the response • View Resolver: maps the logical name to actual view <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />