freemarker 模板报错

@Controller

@RequestMapping("ftl")

public class IndexController {

    @Autowired    

    private Resource resource;

    @RequestMapping("/index")

    public String index(ModelMap map) {

        map.addAttribute("resource", resource);

            return "index";

        }

}

freemarker 模板报错 

Description: Field resource in com.hibo.controller.IndexController required a bean of type 'org.springframework.core.io.Resource' that could not be found.

Action: Consider defining a bean of type 'org.springframework.core.io.Resource' in your configuration.