[SOLVED] Beginner confusion about autowiring in Spring

Beginner confusion about autowiring in Spring

All:

I just begin the Spring study, there is one concept confused me so much: The Autowiring.

The question I need to be clear is:

What kind of thing can be autowired? Is it only other beans?

If I define a class Bar:

public class Bar {
    @Autowired
    public String name;
}

I am thinking what if I put a @Autowired annotation to a member variable like String name; and in bean config XML I wrote:

<bean id="bar" class="com.Bar">
    <property name="name" value="Bar" />
</bean>

So many ways to do same thing in Spring confused me so much. ToT. Is there any good trick to clearly remember and tell diff among different ways?

Thanks

Solution

Yes, You can only @Autowired Beans. @Autowired is the way of using Dependency Injection in Spring. It is provided for Beans - components wrote once and used many times. There's no sense using DI on String property and I think You get Exception.