在 Spring 可以将 @Autowired
bean与类和 @Qualifier
一起使用。
如何以编程方式做同样的事情? IE。搜索上下文中给出它的类和限定符的bean?
我看到了很多 getBean()
方法,但它们都没有明确声明它可以做到这一点。
最佳答案
您可以使用BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactory beanFactory, Class<T> beanType, String qualifier)
:
/**
* Obtain a bean of type {@code T} from the given {@code BeanFactory} declaring a
* qualifier (e.g. via {@code <qualifier>} or {@code @Qualifier}) matching the given
* qualifier, or having a bean name matching the given qualifier.
* @param beanFactory the BeanFactory to get the target bean from
* @param beanType the type of bean to retrieve
* @param qualifier the qualifier for selecting between multiple bean matches
* @return the matching bean of type {@code T} (never {@code null})
* @throws NoUniqueBeanDefinitionException if multiple matching beans of type {@code T} found
* @throws NoSuchBeanDefinitionException if no matching bean of type {@code T} found
* @throws BeansException if the bean could not be created
* @see BeanFactory#getBean(Class)
*/
public static <T> T qualifiedBeanOfType(BeanFactory beanFactory, Class<T> beanType, String qualifier)
throws BeansException;
我认为这正是您所需要的。
关于java - 如何以编程方式获取带有类和限定符的bean?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/37943409/