Java @spring boot、JPA和Crudepository的autowire错误

我尝试将spring boot与JPA一起使用，但出现以下错误：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'accountCommand': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.compta.repositories.AccountRepository com.compta.commands.AccountCommand.accountRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.compta.repositories.AccountRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:120)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:648)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:909)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:898)
at Compta.main(Compta.java:12)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.compta.repositories.AccountRepository com.compta.commands.AccountCommand.accountRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.compta.repositories.AccountRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
... 16 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.compta.repositories.AccountRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1103)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:963)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
... 18 more

我的代码：

@ComponentScan
@EnableAutoConfiguration
public class Compta {

    public static void main(String[] args) throws Exception {
        SpringApplication.run(Compta.class, args);
    }
} 

@Entity
@Table(name = "ACCOUNT")
public class Account {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    @Column
    private String name;

    public Account() {
        super();
    }

    public long getId() {
     return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

@Repository
public interface AccountRepository extends JpaRepository<Account, Long> {

}

@Service
public class AccountCommand {

    @Autowired
    private AccountRepository accountRepository;

    public Account create() {
        return accountRepository.save(new Account());
    }
}

@ComponentScan
@启用自动配置
公共类公司{
公共静态void main（字符串[]args）引发异常{
SpringApplication.run（Compta.class，args）；
}
} 
@实体
@表（name=“ACCOUNT”）
公共类帐户{
私有静态最终长serialVersionUID=1L；
@身份证
@GeneratedValue（策略=GenerationType.AUTO）
私人长id；
@纵队
私有字符串名称；
公共帐户（）{
超级（）；
}
公共长getId（）{
返回id；
}
公共无效集合id（长id）{
this.id=id；
}
公共字符串getName（）{
返回名称；
}
公共void集合名（字符串名）{
this.name=名称；
}
}
@存储库
公共接口AccountRepository扩展了JpaRepository{
}
@服务
公共类AccountCommand{
@自动连线
私人帐户存储库；
公共帐户创建（）{
返回accountRepository.save（新帐户（））；
}
}

---

有什么想法吗？

查看堆栈跟踪，您的

Compta

类似乎不在任何包中。这可能会导致问题（请参阅），因此我会先尝试将所有类放在一个包中

还要检查您的

AccountRepository

是否在同一个包中，或者是否在

Compta

的子包中

---

如果您仍然有问题，也许您可以共享一个完整的项目来复制问题？

如果所有这些类都在同一个包中，那么它就可以工作。我猜他们不是（所以Spring数据不知道在哪里扫描存储库）？回答得好，我把Compta类放在一个包中，一切正常。非常感谢