It's possible to get a bean directly from Spring instead of using dependency injection by making Spring's ApplicationContext, which contains all the beans, a dependency of your class. In this recipe, we'll inject an existing bean into a controller class.
We will use the code from the Defining a bean implicitly with @Component recipe, where we defined a UserService bean.
Here are the steps to get and use a bean directly:
In the controller class, add an
ApplicationContextfield annotated with@Autowired:@Autowired private ApplicationContext applicationContext;
In a controller method, use the
ApplicationContextobject and itsgetBean()method to retrieve theUserServicebean:UserService userService = (UserService)applicationContext.getBean("userService");