Spring Boot`org.springframework.beans.factory.BeanCreationException：创建bean注入自动装配依赖项失败;

我是Spring Boot的新手，我有一个简单的应用程序，它有一个控制器和一个Thymeleaf模板。Spring Boot`org.springframework.beans.factory.BeanCreationException：创建bean注入自动装配依赖项失败;

当应用程序启动时，为了查看是否一切正常，应该运行一个名为RepoTester的Spring ApplicationListener以检查服务类的方法。该服务类调用PersonRepository的方法，它简单地扩展了Spring的CrudRepository。但是我每次去尝试运行应用程序，它属于在给我的留言：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repoTester': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private webapps.city2016.micro.code.service.PersonService webapps.city2016.micro.code.bootstrap.RepoTester.personService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private webapps.city2016.micro.code.repo.PersonRepository webapps.city2016.micro.code.service.PersonServiceImpl.personRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [webapps.city2016.micro.code.repo.PersonRepository] 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)}

但我不明白为什么。

的ApplicationListener类只是：

@Component 
public class RepoTester implements ApplicationListener<ContextRefreshedEvent> { 

@Autowired 
private PersonService personService; 

private static final Logger logger = Logger.getLogger(RepoTester.class); 

@Override 
public void onApplicationEvent(ContextRefreshedEvent event) { 
    logger.info(RepoTester.class.getName() + ".onApplicationEvent() method called."); 

    // Create Person. 
    Person person = new Person(); 
    person.setName("Cleo Markham"); 
    person.setAddress("48 Alysbury Road"); 
    person.setTelephone("34561287"); 
    person.setEmail("[email protected]"); 
    person = personService.save(person);

的Person类只是：

public class Person { 

    // Attributes.  
    private Integer personId; 
    private String name; 
    private String address; 
    private String telephone; 
    private String email;

随着getter和setter为每个属性的方法。

的应用程序也有一个属性文件名为application.properties指定Derby数据库的使用方法：

spring.datasource.driverClassName=org.apache.derby.jdbc.ClientDriver 
spring.datasource.url=jdbc:derby://localhost:1527/Library 
spring.datasource.username=username 
spring.datasource.password=password

服务类的代码很简单：

@Service() 
public class PersonServiceImpl implements PersonService { 

    @Autowired 
    private PersonRepository personRepository; 

    private static final Logger logger = Logger.getLogger(PersonServiceImpl.class); 

    public PersonServiceImpl() { 
    } 

    @Override 
    public void delete(Integer personId) { 
     logger.info(PersonServiceImpl.class.getName() + ".delete() method called."); 

     personRepository.delete(personId); 
    } 

    @Override 
    public boolean exists(Integer personId) { 
     logger.info(PersonServiceImpl.class.getName() + ".exists() method called."); 

     return personRepository.exists(personId); 
    } 

    @Override 
    public Person findOne(Integer personId) { 
     logger.info(PersonServiceImpl.class.getName() + ".findOne() method called."); 

     return personRepository.findOne(personId); 
    } 

    @Override 
    public Iterable<Person> findAll() { 
     logger.info(PersonServiceImpl.class.getName() + ".findAll() method called."); 

     return personRepository.findAll(); 
    } 

    @Override 
    public Person save(Person person) { 
     logger.info(PersonServiceImpl.class.getName() + ".save() method called."); 

     return personRepository.save(person); 
    }

和存储库是：

package webapps.city2016.micro.code.repo; 

import org.springframework.data.repository.CrudRepository; 

import webapps.city2016.micro.code.model.Person; 

public interface PersonRepository extends CrudRepository<Person, Integer> { 
}

我的Maven文件是：

http://maven.apache.org/xsd/maven-4.0.0.xsd“> 4.0.0 webapps.city2016.micro RegistrationSpringBootThymeleaf1 1.0-快照罐
UTF-8 1.8 1.8

<parent> 
    <groupId>org.springframework.boot</groupId> 
    <artifactId>spring-boot-starter-parent</artifactId> 
    <version>1.3.5.RELEASE</version> 
    <relativePath /> 
</parent> 

<dependencies> 
    <dependency> 
     <groupId>org.apache.derby</groupId> 
     <artifactId>derbyclient</artifactId> 
     <version>10.12.1.1</version> 
    </dependency>  
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-jdbc</artifactId> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-data-jpa</artifactId> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-web</artifactId> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter</artifactId> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-thymeleaf</artifactId> 
    </dependency>      
</dependencies> 

<build> 
    <plugins> 
     <plugin> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-maven-plugin</artifactId> 
     </plugin> 
    </plugins> 
</build> 

<name>RegistrationSpringBootThymeleaf1</name>

任何人都可以建议我在哪里错了？

来源

2016-07-21 Mr Morgan

我尝试了所有已发布的答案，但没有成功，因此应用程序已通过手动编写的DAO类转换为Spring JDBC，并且完美地工作。

虽然有关JPA的任何建议都会受到欢迎。

来源

2016-07-22 00:15:21

你需要注释的人与JPA注释：

@Entity 
@Table(name = "person") 
public class Person { 

    // Attributes.  
    private Integer personId; 
    private String name; 
    private String address; 
    private String telephone; 
    private String email; 

    @Id 
    @Column(name = "id") 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    public Integer getPersonId() { ... } 

    @Basic 
    @Column(name = "name") 
    public String getName() { ... }

来源

2016-07-22 00:22:53

不幸的是会出现同样的问题。 –

你注释过所有的获得者吗？你是否也将EnableJpaRepositories放回配置文件？ –

即使实际变量的获取者本身被注释了，该项目仍然失败。 –

你可以在这里阅读所有要求： http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-jpa-and-spring-data

或检查，你已经做了在本教程中提到的一切： http://spring.io/guides/gs/accessing-data-jpa/

特别检查您是否有：

主类注释与@Entity
与@Id和类型的泛型类型的存储库（整数）相匹配注释实体的主键注释@SpringBootApplication
实体类。
您的实体和存储库类位于主类或更低级别的包级别。

来源

2016-07-22 11:59:31 jhyot

使用'@ SpringBootApplication'注释的主类：是。使用'@ Entity'注释的实体类：是。主键... ：是的。您的实体和存储库类：是的。而且这个可怜的应用程序仍然失败！ –

Spring Boot`org.springframework.beans.factory.BeanCreationException：创建bean注入自动装配依赖项失败;

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