Question

For a new legacy application I have to use Latest Spring framework 3.x with Hibernate 3.x. Earlier I used Spring IoC with xml configuration. Now i would like to go for annotation based IoC.

Below link from rose india shows use annotation without xml file.
rose india

but i have found some other way of implementing in another site:
blog

I am confused here which way to implement IoC with latest technology.
Please refer some good site for sample. Also please share some sample code for IoC with annotation.

EDIT:

Spring reference document 3.x says use @Configuration or xml configuration i.e. with annotation <context:annotation-config/>. Which one is better to use? Why?

Answer 1

Your best bet is to start with the Spring 3.0 Documentation. If you already are familiar with Dependency Injection using xml configuration, take a look at Spring’s annotation support in Section 3.9 Annotation-based container configuration. There should be plenty of details there to help get you started.

If this is not a WebApp, and you need to load the ApplicationContext yourself, you should take a look at Section 3.11 Java-based container configuration. This section details how you can create your ApplicationContext with your xml configuration.

I would recommend using the @Autowired annotations for wiring with @Component annotation for defining beans within the ApplicationContext, and use the scan(String) method provided by the AnnotationConfigApplicationContext to find all annotated components:

public static void main(String[] args) {
  AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
  ctx.scan("your.package.here");
  ctx.refresh();
  MyService myService = ctx.getBean(MyService.class);
  //use myService
}