[lmm]

The point is you don't have to write the Spring configuration (except in the rare cases where you need to override with something specific). Just mark each class's constructor as @Autowired, make an AnnotationConfiguredApplicationContext passing the list of all your classes, and you don't have to manually keep track of which services need which other services - Spring takes care of instantiating everything in order and passing dependencies into the things that need them.