Java Spring Boot 1.5.1，Spring Data MongoDB没有符合存储库要求的bean

在我的SpringBoot 1.5.1项目中，我添加了以下Maven依赖项：

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

并通过此对象使用集合进行操作

但当我尝试注入时，我的应用程序失败：

@Autowired
private CustomerRepository customerRepository;

除以下例外：

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.example.CustomerRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1486)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
    ... 56 common frames omitted

这是我的配置类：

@Configuration
@ComponentScan("com.example")
@EnableMongoRepositories(basePackages = "com.example.domain.repository")
@SpringBootApplication
public class TestConfig {
}

---

此外，我使用的Neo4j存储库工作正常。如何修复它？

如果您使用多个Spring数据模块（在您的例子中是Neo4J+MongoDB），则需要为这两种类型的存储库设置严格的配置。例如：

@Configuration
@ComponentScan("com.example")
@EnableMongoRepositories(basePackages = "com.example.domain.repositories.mongodb")
@EnableNeo4jRepositories(basePackages = "com.example.domain.repositories.neo4j")
@SpringBootApplication
public class TestConfig {
}

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.example.CustomerRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1486)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
    ... 56 common frames omitted

@Configuration
@ComponentScan("com.example")
@EnableMongoRepositories(basePackages = "com.example.domain.repository")
@SpringBootApplication
public class TestConfig {
}

@Configuration
@ComponentScan("com.example")
@EnableMongoRepositories(basePackages = "com.example.domain.repositories.mongodb")
@EnableNeo4jRepositories(basePackages = "com.example.domain.repositories.neo4j")
@SpringBootApplication
public class TestConfig {
}