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在无法找到答案且包含 beans.xml 的场景中注入 bean 时出现以下异常：

Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type CustomerAgreementDaoImpl with qualifiers @Default
  at injection point [BackedAnnotatedField] @Inject public com.evry.integrator.snow.fetch.CustomerAgreementFetcher.customerAgreementDaoImpl
  at com.evry.integrator.snow.fetch.CustomerAgreementFetcher.customerAgreementDaoImpl(CustomerAgreementFetcher.java:0)

        at org.jboss.weld.bootstrap.Validator.validateInjectionPointForDeploymentProblems(Validator.java:378)
        at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:290)

以下是代码结构：

/WEB-INF 中的 Beans.xml

<beans xmlns="http://java.sun.com/xml/ns/javaee" 
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
                           http://java.sun.com/xml/ns/javaee/beans_1_1.xsd"
       version="1.1" bean-discovery-mode="all"> 
</beans>

接口

public interface GenericDao<T, PK> {

public interface CustomerAgreementDao extends GenericDao<CustomerAgreement, Long>{

实现通用 DAO 的抽象类

public abstract class GenericDaoImpl<T, PK> implements GenericDao<T, PK> {

@PersistenceContext(unitName = "IntegratorMasterdataDS")
protected EntityManager em;

主要实现

@Stateless
public class CustomerAgreementDaoImpl extends GenericDaoImpl<CustomerAgreement, Long> implements CustomerAgreementDao {

public CustomerAgreementDaoImpl() {
    System.out.println("CustomerAgreementDaoImpl");
}

服务类中使用的道

@Stateless
public class CustomerAgreementFetcher {

    @Inject
    public CustomerAgreementDaoImpl customerAgreementDaoImpl;

主调度程序加载以上所有内容

@Startup
@Singleton
@AccessTimeout(value = 5, unit = TimeUnit.MINUTES)
public class WPoller {
    @Inject
    CustomerAgreementFetcher customerAgreementFetcher;
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1 回答 1

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您可以将字段的类型更新为 CustomerAgreementDao 接口吗？

@Stateless
public class CustomerAgreementFetcher {

    @Inject
    public CustomerAgreementDao customerAgreementDao;

相关主题：是否可以使用 CDI 注入 EJB 实现而不是其接口？

于 2019-12-02T08:25:40.113 回答