Can create HashMap with Spring but can't create Map - spring

Question

I can do this in my applicationContext with Spring (3.0.5):
<bean id="map" class="java.util.HashMap" scope="prototype" >
<constructor-arg>
<map key-type="java.lang.String" value-type="java.lang.String">
<entry key="Key 1" value="1" />
<entry key="Key 2" value="2" />
</map>
</constructor-arg>
</bean>
And in my controller, I can autowired my map like this:
#Autowired
#Qualifier("map")
private HashMap<String, String> map;
It works fine, but if I do this:
#Autowired
#Qualifier("map")
private Map<String, String> map;
I get that:
Caused by:
org.springframework.beans.factory.NoSuchBeanDefinitionException: No
matching bean of type [java.lang.String] found for dependency [map
with value type java.lang.String]: expected at least 1 bean which
qualifies as autowire candidate for this dependency. Dependency
annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true),
#org.springframework.beans.factory.annotation.Qualifier(value=map)}
My question is: Why I can't autowired my map with the interface when I can with the implementation ?
Thanks.

Answer 1

While declaring a bean of type collection, one cannot inject it via #Autowired. See below documentation from Spring:
4.11.3 Fine-tuning annotation-based autowiring with qualifiers
As a specific consequence of this semantic difference, beans which are
themselves defined as a collection or map type cannot be injected via
#Autowired since type matching is not properly applicable to them. Use
#Resource for such beans, referring to the specific collection/map
bean by unique name.
Thus instead of #Autowired, use #Resource:
#Resource
#Qualifier("map")
private Map<String, String> map;

Answer 2

Try to use #Resource instead of #Autowired
#Resource(name="map")
private HashMap<String, String> map;
Check out the tip in 3.9.3 Fine-tuning annotation-based autowiring with qualifiers of Spring's documentation