1. Import Template Project

• Copy and import:
  • "template projects\\\\spring_mvc_hibernate"
• Confirm dependencies (via Maven or project configuration).

2. Configure Front Controller

• Purpose: Ensure any request from any client is intercepted by a global interceptor.

• Component: Spring-supplied Front Controller.

• Class: org.springframework.web.servlet.DispatcherServlet

• Configuration (in web.xml):

  <servlet>
      <servlet-name>abc</servlet-name> <!-- spring -->
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
      <servlet-name>abc</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  

3. Application Startup

• Process:
  • Web Container (WC) starts the lifecycle of the DispatcherServlet (D.S):
    • Load servlet class
    • Loads singleton instance.
    • Initializes ServletConfig.
    • Calls init method.
  • DispatcherServlet starts the Spring Container (SC) using an XML configuration file.
• Defaults of XML Config File:
  • Location: WEB-INF (private content folder).
  • Name: servletName-servlet.xml (e.g., abc-servlet.xml).
  • Contents: Instructions for starting the Spring Container.
    • Configuration spring supplied view resolver bean
    • prefix: /WEB-INF/views/
    • suffix: .jsp

4. Copy XML Configuration

• Copy the XML configuration file from:
  • "day11-data\\\\day11_help\\\\spring-hibernate-templates\\\\spring-servlet.xml"
• Place it under WEB-INF.

5. Create Request-Handling Controller

• Purpose: To render the "index page".
• Steps:

  1. Add Class-Level Annotation:

     • @Controller: Marks the class as a request-handling controller - class level annotation
       • for Presentation Logic (P.L).

     @Controller
     public class MyController {
         // Request-handling methods
     }
     

  2. Add Method-Level Annotations (for request-handling methods):

     • @RequestMapping: (value = “url-pattern”)
       • Equivalent to the service method of a Servlet.
       • can intercept any HTTP method (GET | POST | PUT | DELETE…)
     • @GetMapping: Maps to doGet (equivalent to @RequestMapping(method=GET)).
     • @PostMapping: Maps to doPost (equivalent to @RequestMapping(method=POST)).

     @GetMapping("/")
     public String renderIndexPage() {
         return "index"; // Logical View Name
     }