如何在Spring语境中纠正bean的注入映射

Question

I am using component-scan in my spring application. So in spring context I created map:

<util:map id="mapByName" map-class="java.util.concurrent.ConcurrentHashMap">
    <entry key="Name1" value-ref="MyCustomClassName1" />
</util:map>

and in my class annotated by @Service I want to inject this property:

@Inject
private Map<String, MyCustomClassName1> mapByName;

this is still working. Problem just in name of key. When I print this property I got [MyCustomClassName1=org.my.package.service.MyCustomClassName1@cb52f2]

so as you can see name of key is changed from Name1->MyCustomClassName1 (Name of this class). So my question is how to define custom key name in map property ?

Answer 1

If I were you, I would use Java Config to create a Map, since Java is the best way to create a Java object :) :). Your configuration code would look like this:

@Bean(name = "mapBean")
public Map<String, MyCustomClassName1> mapBean() {
    Map<String, MyCustomClassName1> map = new HashMap<>();
    //populate the map here - you will need to @Autowire the references if they are not defined in this configuration
    return map;
}

And then I would inject it into wherever it's needed like so:

@Resource(name="mapBean")
private Map<String, MyCustomClassName1> map;

Note the use of @Resource instead of @Autowired or @Inject

Answer 2

Quote from the documentation :

An autowired Maps values will consist of all bean instances that match the expected type, and the Maps keys will contain the corresponding bean names.

I think that just changing @Inject with @Resource will do it.