Learn Java for Web Development

CHAPTER 5: Building Java Web Applications with Spring Web MVC 241

Listing 5-36. The Web Deployment Description for Spring MVC

1. <?xml version="1.0" encoding="UTF-8"?>


2. <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi=
   "http://www.w3.org/2001/XMLSchema-instance"


3. xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
   http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"


4. version="3.0">


5. 
   


6. 
   
   


7. 
   
   


8. 
   contextConfigLocation
   


9. 
   /WEB-INF/spring/root-context.xml
   


10. 
    
    


11. 
    


12. 
    
    


13. 
    
    


14. 
    org.springframework.web.context.ContextLoaderListener
    


15. 
    
    


16. 
    


17. 
    
    


18. 
    
    


19. 
    appServlet
    


20. 
    org.springframework.web.servlet.DispatcherServlet
    


21. 
    
    


22. 
    contextConfigLocation
    


23. 
    /WEB-INF/spring/appServlet/servlet-context.xml
    


24. 
    
    


25. 
    1
    


26. 
    
    


27. 
    


28. 
    
    


29. 
    appServlet
    


30. 
    /
    


31. 
    
    


32. 
    


33. 
    
    

   Lines 2 to 4: In the <web-app> tag, the version attribute and the corresponding

URL are changed to version 3.0 to indicate to the web container that the web

application will use Servlet 3.0.

   Lines 7 to 10: In the <context-param> tag, the contextConfigLocation param

is provided, which defines the location of Spring’s root WebApplicationContext

configuration file.

   Lines 13 to 15: A listener of class org.springframework.web.context.

ContextLoaderListener is defined. This is for Spring to load the root

WebApplicationContext.

   Lines 18 to 26: One dispatcher servlet (called appServlet) is defined. We use the

one generated by the template project for the application’s presentation layer.

The WebApplicationContext for the dispatcher servlet is located at

/src/main/webapp/WEB-INF/spring/appServlet/servlet-context.xml.