Controller can't find service

[nash.rf]

I am new to Spring and I can't find out why my controller raises a null pointer exception.

My controller's code

@Controller
@RequestMapping("/home")
public class HomeController {

	@RequestMapping(method = RequestMethod.GET)
	protected ModelAndView handleRequestInterval(
			HttpServletRequest request,
			HttpServletResponse response) throws Exception{
		List<String> recentRants = rantService.getRecentRants(); //this fails
		return new ModelAndView("home","rants",recentRants);
		
	}

	private RantService rantService;
	public void setRantService(RantService rantService) {
		this.rantService = rantService;
	}
	
}

My service

@Service
public class RantService {
	@Autowired
	public List<String> getRecentRants(){
		List<String> l = new ArrayList<String>();
		l.add("one");
		l.add("two");
		return l;
	}
}

My service-conf.xml
<context:component-scan base-package="net.nacho.services" />

that points to the package where my Service is placed


I was looking for similar problems-solutions but no luck. Anyone could give me a clue?

[hernani]

You have to Autowire rentService, otherwise Spring doesn't know you want to "dependency inject" the service there, so your controller looks like:

@Controller
@RequestMapping("/home")
public class HomeController {

       .......

       @Autowired
	private RantService rantService;
	public void setRantService(RantService rantService) {
		this.rantService = rantService;
	}
	
}

Or you could put the annotation in the setter to, or even just don't write any setter, but that's a matter of taste.

It seems to me you still need some reading to understand the basics of th IOC You are you annotating the getRecentRants method with @Autowired?

[ivan_stefanov]

Make sure also that you put

<context:annotation-config/>

in your application context XML file (service-conf.xml)

[nash.rf]

You have to Autowire rentService, otherwise Spring doesn't know you want to "dependency inject" the service there, so your controller looks like:

@Controller
@RequestMapping("/home")
public class HomeController {

       .......

       @Autowired
	private RantService rantService;
	public void setRantService(RantService rantService) {
		this.rantService = rantService;
	}
	
}

Or you could put the annotation in the setter to, or even just don't write any setter, but that's a matter of taste.

It seems to me you still need some reading to understand the basics of th IOC You are you annotating the getRecentRants method with @Autowired?

Thanks, I only needed to add the @Autowired annotation to my service.