Introducing Spring Framework

Chapter 10 ■ Showing Your Spring Application on the Web
@Controller
@RequestMapping("/search")
public class SearchController {
@Autowired
DocumentDAO documentDAO;
}
@RequestMapping(value="/all",method=RequestMethod.GET)
public String searchAll(Model model){
model.addAttribute("docs", documentDAO.getAll());
return "search/all";
}
As you can see in Listing 10-3, the controller is very simple and it uses different annotations, but let’s see each one
and its meaning.
• @Controller: This will mark your class as the controller so the DispatcherServlet know where
to delegate the request.
• @RequestMapping: This annotation tells how to access this controller, in this case through
the path/search. Later on in the method you will have the same annotation that is telling you
that it will only execute with the path /all and will only accept GET requests. At the end, the
path will be http://///search/all.
• @Autowired: This will inject the DocumentDAO implementation.
Next, you need to add the web.xml that will define how the web application should start up. In any Java web
application, the web.xml file is necessary for most application servers so they know what to do to start the web
application; this is a standard way to deploy web apps. Nowadays this has been simplified by removing the web.xml
file (like in Java 6 EE, and of course when using Spring), but in this case you are going to follow the same standard.
Later (in Chapter 19) you will see that no web.xml or any other configuration file is required for web applications.
Listing 10-4 shows the web.xml file; this file should be put in the src/main/webapp/WEB-INF/ folder.
Listing 10-4. web.xml
mydocuments
org.springframework.web.servlet.DispatcherServlet
1
mydocuments
/mydocuments/*
136