spring vs ejb3 - what is different in beans injection?

Question

is it correct that in spring I can inject my own beans , and in ejb3 I can inject only ejb3 beans ? if so how can ejb3 be a replacement to Spring?

Answer 1

In a Java EE environment, you can not only use EJB, but also CDI. see How do CDI and EJB compare? interact?

Answer 2

Besides the fact that you can use CDI for injecting different types of beans, what do you mean by "ejb3" beans and how those beans are not yours as in case of spring? Spring injects any kind of bean and you do that either by declaring it in XML (old approach) or by specifying an annotation (@Component, @Service, etc.). Which is the case also for EJB3 (you can use @Stateless instead of @Service, just to make an analogy). So, in JEE environment one can be replaced with the other (from this point of view, Spring has some advantages as it sets the grounds for fast development, providing additional helpers, libraries, frameworks on top of JEE specification - see Spring Data JPA for one). So, I think is a matter of how you design your application to use one or the other.