java - 如何以编程方式获取带有类和限定符的 bean？

Question

有可能@Autowired bean 类和@Qualifier在 Spring 。

如何以编程方式做同样的事情？ IE。为 bean 提供类和限定符的搜索上下文？

我看到很多 getBean()方法，它们都没有明确声称它可以做这件事。

Answer 1

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。