包括来自外部 jar 的 Spring 上下文找不到服务

【问题标题】：Including Spring context from an external jar does not find services包括来自外部 jar 的 Spring 上下文找不到服务
【发布时间】：2014-08-25 21:18:09
【问题描述】：

我目前正在使用 Spring Boot 和基于注释的配置来管理我的 Spring 应用程序。该项目由一个注册和一个外部服务库组成。

Service 由带有 @Service 注释的类组成，并在其中注入了 @Reposity。

注册注入@Service。

项目结构（4个maven项目）：

xelamitchell (Parent POM)
  +- domain
  +- service (Spring JPA)

registration (separate project with Spring Boot)

注册对服务有 maven 依赖。

人员服务：

package org.xelamitchell.service.person;

import org.xelamitchell.domain.person.Person;
import java.util.List;

/**
 * Manages {@link Person}s.
 * 
 * @author amitchell
 */
public interface PersonService {

    List<Person> list();

    Person get(Long id);

    Boolean exists(Long id);

    Person save(Person person);

    Boolean delete(Long id);

}

package org.xelamitchell.service.person;

import org.xelamitchell.domain.person.Person;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Service;

/**
 *
 * @author amitchell
 */
@Primary
@Service
public class DefaultPersonService implements PersonService {

    private PersonRepository repository;

    protected DefaultPersonService() {}

    @Autowired
    public DefaultPersonService(PersonRepository repository) {
        this.repository = repository;
    }

    @Override
    public List<Person> list() {
        return repository.findAll();
    }

    @Override
    public Person get(Long id) {
        return repository.findOne(id);
    }

    @Override
    public Boolean exists(Long id) {
        return repository.exists(id);
    }

    @Override
    public Person save(Person person) {
        return repository.save(person);
    }

    @Override
    public Boolean delete(Long id) {

        if(id != null) {
            repository.delete(id);
        }

        return repository.exists(id);
    }

}

PersonRepository：

package org.xelamitchell.service.person;

import org.xelamitchell.domain.person.Person;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

/**
 *
 * @author amitchell
 */
@Repository
public interface PersonRepository extends JpaRepository<Person, Long> {

}

服务库配置：

@Configuration
public class ServiceContext {
}

应用配置：

@Configuration
@ComponentScan(basePackages = {"org.xelamitchell"})
@EnableAutoConfiguration
//@Import({WebContext.class, ServiceContext.class})
public class Application {

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

Spring boot 在应用程序的 POM 中定义。

我不断得到的例外是@Repository 类无法注入到它们各自的@Service：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.xelamitchell.service.person.PersonService org.xelamitchell.registration.PersonController.service; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'defaultPersonService' defined in file [/home/amitchell/Workspace/org/xelamitchell/service/target/classes/org/xelamitchell/service/person/DefaultPersonService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.xelamitchell.service.person.PersonRepository]: : No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    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:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    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:691)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
    at org.xelamitchell.registration.Application.main(Application.java:26)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.xelamitchell.service.person.PersonService org.xelamitchell.registration.PersonController.service; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'defaultPersonService' defined in file [/home/amitchell/Workspace/org/xelamitchell/service/target/classes/org/xelamitchell/service/person/DefaultPersonService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.xelamitchell.service.person.PersonRepository]: : No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    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 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'defaultPersonService' defined in file [/home/amitchell/Workspace/org/xelamitchell/service/target/classes/org/xelamitchell/service/person/DefaultPersonService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.xelamitchell.service.person.PersonRepository]: : No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:747)
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1114)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1017)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1017)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
    ... 18 common frames omitted
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    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.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:811)
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:739)
    ... 31 common frames omitted

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.xelamitchell.service.person.PersonService org.xelamitchell.registration.PersonController.service; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'defaultPersonService' defined in file [/home/amitchell/Workspace/org/xelamitchell/service/target/classes/org/xelamitchell/service/person/DefaultPersonService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.xelamitchell.service.person.PersonRepository]: : No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    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:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    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:691)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
    at org.xelamitchell.registration.Application.main(Application.java:26)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.xelamitchell.service.person.PersonService org.xelamitchell.registration.PersonController.service; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'defaultPersonService' defined in file [/home/amitchell/Workspace/org/xelamitchell/service/target/classes/org/xelamitchell/service/person/DefaultPersonService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.xelamitchell.service.person.PersonRepository]: : No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    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.UnsatisfiedDependencyException: Error creating bean with name 'defaultPersonService' defined in file [/home/amitchell/Workspace/org/xelamitchell/service/target/classes/org/xelamitchell/service/person/DefaultPersonService.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.xelamitchell.service.person.PersonRepository]: : No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:747)
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1114)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1017)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1017)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
    ... 18 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.xelamitchell.service.person.PersonRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    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.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:811)
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:739)
    ... 31 more

【问题讨论】：

  • 请发布整个堆栈跟踪。您正在扫描组件两次（您的 Application 类已经扫描了所有内容，无需在 ServiceContext 中再次执行此操作）。
  • 感谢 Deinum。包括完整的堆栈跟踪。
  • 除了启用（冗余）组件扫描之外，ServiceContext 是否进行任何额外配置？
  • 目前没有任何额外内容。
  • 我不明白你为什么要使用@Imports，因为组件扫描会获取你的配置文件。

标签： java maven spring-boot


【解决方案1】：

讨论后编辑...

在应用程序类的顶部添加“@EnableJpaRepositories”和“@EntityScan”。

@EnableJpaRepositories("org.xelamitchell")
@EntityScan("org.xelamitchell")

HTH...

【讨论】：

  • 我想我找到了解决方案。您需要从“PersonRepository”中删除“@Repository”注释，因为它扩展了“JpaRepository”，这表示它是一个“存储库”。
  • 只有 PersonRepository 是持久化 Person 所需的 Repository。注册具有数据库的数据源。回家后我会将实际项目放在 Github 上。
  • 您是否尝试从“PersonRepository”界面中删除“@Repository”注释？
  • @Repository 是否存在并不重要，它不会添加任何东西（除非它是一个存储库可能更加清晰）。
  • @ripudam 我还必须添加“@EntityScan”才能在域包中查找实体。请编辑您的答案以删除自动装配和“@Repository”删除并添加“@EnableJpaRepositories”和“@EntityScan”，我将接受此作为正确答案。感谢您的帮助。
【解决方案2】：

您的接口实现在哪里：PersonRepository？找到它，在上面添加@Repository，然后从PersonRepository 接口中移除这个注解。

【讨论】：

  • Spring data 负责提供扩展 JpaRepository 的接口的实现。
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