Spring 2.5的新特性:配置简化和基于注解的功能

id="dataSource" primary="true" ... />  

@Autowired
@Qualifier("primaryDataSource")
private DataSource dataSource; 

@Autowired
public void setup(@Qualifier("primaryDataSource") 
DataSource dataSource, AnotherObject o) { 
... 
} 

@Target({ElementType.FIELD, ElementType.PARAMETER, 
ElementType.TYPE, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Qualifier
public @interface VetSpecialty { ... } 

@Autowired
@VetSpecialty("dentistry")
private Clinic dentistryClinic;  

id="dentistryClinic" class="samples.DentistryClinic">
type="example.VetSpecialty" value="dentistry"/>  

<bean class="org.springframework.beans.factory.annotation.CustomAutowireConfigurer">
<property name="customQualifierTypes">
<set>
<value>example.VetSpecialty</value>
</set>
</property>
</bean>  

@Target({ElementType.FIELD, ElementType.PARAMETER, ElementType.TYPE, 
ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface VetSpecialty { ... }  

class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor">
name="autowiredAnnotationType" value="example.Injected"/>  

@SpecializedClinic(species="dog", breed="poodle")
private Clinic poodleClinic; 

@Target({ElementType.FIELD, ElementType.PARAMETER, ElementType.TYPE, 
ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Qualifier
public @interface SpecializedClinic {
String species();
String breed(); 
} 

id="poodleClinic" class="example.PoodleClinic">
type="example.SpecializedClinic">
key="species" value="dog"/>
key="breed" value="poodle"/>