Java 使用自定义批注时发生依赖项注入错误

我正在尝试使用springboot应用程序中的以下代码基于注释参数初始化bean。但是我没有得到任何符合条件的bean错误。你知道可能是什么问题吗

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [DemoClient] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.inject.Inject(), @DemoAnnotation(name=demo)}

自定义注释

@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.TYPE, ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER })
public @interface DemoAnnotation {
    String name() default "";
}

接口

public interface DemoClient {
}

恳求

工厂

import javax.enterprise.inject.Produces;

public class DemoClientFactory {        
    @Produces
    public DemoClient createDemoClient(InjectionPoint injectionPoint) {
        DemoAnnotation demoAnnotation = injectionPoint.getAnnotated().getAnnotation(DemoAnnotation.class);
        if (demoAnnotation != null) {
            System.out.println("NAME " + demoAnnotation.name());
        }
        // can return different Impl's based on annotation parameter 'name'
        return new DemoClientImpl();
    }
}

试验

---

这是JavaEE而不是Spring，我将删除我的答案。您的应用程序中似乎有SpringJAR（和配置）。你真的在任何地方使用Spring框架吗？你把Spring框架和CDI这两种东西混在一起了。对于Spring，CDI的等价物是

@products

在

@Configuration

类中的

@Bean

，您的demo注释应该是@Qualifier，producer方法应该使用与注入目标相同的demo注释进行注释，以便容器可以匹配这两个。

import javax.enterprise.inject.Produces;

public class DemoClientFactory {        
    @Produces
    public DemoClient createDemoClient(InjectionPoint injectionPoint) {
        DemoAnnotation demoAnnotation = injectionPoint.getAnnotated().getAnnotation(DemoAnnotation.class);
        if (demoAnnotation != null) {
            System.out.println("NAME " + demoAnnotation.name());
        }
        // can return different Impl's based on annotation parameter 'name'
        return new DemoClientImpl();
    }
}

@Inject
@DemoAnnotation(name = "demo")
private DemoClient demoClient;