Question

我在这里明显遗漏了一些东西。我正在制作一个包含spring boot的简单spring data jpa应用，并面临以下错误：

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [locassa.domain.repository.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)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1373) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1119) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    ... 32 common frames omitted

我的代码：

应用：

@SpringBootApplication
@ComponentScan(basePackages = {"app.controller", "app.domain"})
public class Application {

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

}

的pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>pl.mosek</groupId>
    <artifactId>pl.mosek</artifactId>
    <version>0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.0.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.6</version>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
    </dependencies>

    <properties>
        <java.version>1.8</java.version>
    </properties>

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

</project>

控制器：

@RestController
public class TestController {

    @Autowired
    PersonService personService;

    @RequestMapping("/")
    public String index() {
        return "Test spring boot";
    }

    @RequestMapping("/person/{id}")
    public Person personById(@PathVariable Long id) {
        return personService.findPerson(id);
    }
}

PersonService：

public interface PersonService {

    Person findPerson(Long id);
}

PersonServiceImpl：

@Service
public class PersonServiceImpl implements PersonService {

    @Autowired
    PersonRepository personRepository;

    public Person findPerson(Long id) {
       return personRepository.findOne(id);
    }
}

PersonRepository（这个不能自动装配）：

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

已在网上搜索过。我没找到一件事。有什么想法吗？

Answer 1

我也遇到了同样的问题。我用以下解决方案解决了这个问题。如果您的实体类和存储库位于不同的包中，则需要使用以下注释。

@SpringBootApplication
@EntityScan(basePackages = {"EntityPackage"} )
@EnableJpaRepositories(basePackages = {"RepositoryPackage"})
public class Application {

    public static void main(String[] args) {

        SpringApplication.run(Application.class, args);

    }
}

Spring @Autowired无法连接Jpa存储库

1 个答案: