org.jboss.weld.exceptions.DeploymentException WELD-001409: 带有限定符 @Default 的类型 X 的不明确依赖项

Question

我按照文档 (https://docs.jboss.org/weld/reference/latest/en-US/html/injection.html) 创建了限定符，现在我在 wildfly-10.1.0.Final 中遇到了部署错误，我在互联网上提出了很多类似的问题，但仍然没有任何线索。 代码可以编译，注入对其他类也很有效。

这是错误：

"{
    \"WFLYCTL0080: Failed services\" => {\"jboss.deployment.unit.\\\"test.war\\\".WeldStartService\" => \"org.jboss.msc.service.StartException in service jboss.deployment.unit.\\\"test.war\\\".WeldStartService: Failed to start service
    Caused by: org.jboss.weld.exceptions.DeploymentException: Exception List with 2 exceptions:
Exception 0 :
org.jboss.weld.exceptions.DeploymentException: WELD-001409: Ambiguous dependencies for type MessageSender with qualifiers @Default
  at injection point [BackedAnnotatedField] @Inject @B private test.AccessService.messageSenderB
  at test.AccessService.MessageSenderB(AccessService.java:0)
  Possible dependencies:
  - Managed Bean [class test.messagesender.impl.MessageSenderBImpl] with qualifiers [@Any @Default],
  - Managed Bean [class test.messagesender.impl.MessageSenderAImpl] with qualifiers [@Any @Default]

以下是课程：

@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@Target({ TYPE, METHOD, PARAMETER, FIELD })
@Documented
public @interface A{}

@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@Target({ TYPE, METHOD, PARAMETER, FIELD })
@Documented
public @interface B{}

public interface MessageSender {}

@Singleton
@A
public class MessageSenderAImpl implements MessageSender {}

@Singleton
@B
public class MessageSenderBImpl implements MessageSender {}

@Singleton
public class AccessService {
    @Inject
    @A
    private MessageSender messageSenderA;

    @Inject
    @B
    private MessageSender messageSenderB;

似乎第一次注入成功，第二次失败。有什么想法吗？

Answer 1

我终于找到了。

愚蠢的 IDE 自动从 spring 框架中导入了 Qualifier 类

import org.springframework.beans.factory.annotation.Qualifier;

认为正确的使用是

import javax.inject.Qualifier;