[FIXED] No matching bean of type found for dependency: Spring MVC

Issue

I am getting this error when trying to use @autowire, @configuration, @bean, @Repository in my Spring MVC project

Could not autowire field: private com.sachin.dao.StockDaoImpl com.sachin.myapp.HomeController.stockDao;

nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.sachin.dao.StockDaoImpl] found for dependency:

Please let me know what mistake I am making. I am new to Spring MVC and dependency injection.

Here is my controller code. I am trying to inject StockDaoImpl in the controller.

@Controller
public class HomeController {

     @Autowired
    private StockDaoImpl stockDao;

    @RequestMapping(value = "/stockgoogle/", method = RequestMethod.GET)
    public @ResponseBody Stock stockGoogle(Locale locale, Model model) {    
        //StockDaoImpl stockDao = new StockDaoImpl();
        Stock s=stockDao.listGoogle();
        model.addAttribute("s", s );        
        return s;
    }

}

My Service Implementation is below. I have used @Repository annotation here with "stockDao" which is my variable name in controller that I want to inject

@Repository("stockDao")
public class StockDaoImpl implements StockDao { 
    @Override
    public Stock listGoogle() {
        Stock s = null;
        try {
            ... //some code
            String  name = rs.getString("Name");
            s = new Stock(name);
            ...
         } catch (Exception e) {
         }
         return s;
    }
}

Also I have created a configuration class separately. I am using this to define my bean. I am only using this to specify bean and have not imported it anywhere in the code.

@Configuration
public class BeanConfiguration {
    @Bean
    public StockDaoImpl stockDao(){
      return new StockDaoImpl();
    }
}

Am I missing something here. From looking at the error it looks like the @Bean annotation is not visible to the factory. Do I have to do anything else other than annotating the @configuration class.

I might also be using the annotations in a wrong way. I could be making a mistake in how I am using @Autowired or @Repository.

Can you please help.

Solution

I think this might be your issue:

"Also I have created a configuration class separately. I am using this to define my bean. I am only using this to specify bean and have not imported it anywhere in the code."

Somewhere you need to tell Spring to look for BeanConfiguration. You can do this in your applicationContext.xml file (assuming you have one) as follows:

<context:component-scan base-package="com.sachin.config" />

This assumes BeanConfiguration is in the com.sachin.config package.

If you can't find where to put this it may be helpful to share your web.xml file.

Answered By - markwatsonatx