Question

我正在尝试使用Spring Data连接到Neo4J数据库，并使用以下链接（http://projects.spring.io/spring-data-neo4j/#quick-start）。但它似乎没有用。它无法自己创建存储库实现。这就是为什么我得到BeanCreationException。这是我到目前为止所尝试的。

PersistenceContext.java

@Configuration
@EnableTransactionManagement
@ComponentScan("com.ksh.neo4j")
@EnableNeo4jRepositories("com.ksh.neo4j.repositories")
public class PersistenceContext  {

  @Bean
  public org.neo4j.ogm.config.Configuration getConfiguration() 
  {
      org.neo4j.ogm.config.Configuration configuration = new org.neo4j.ogm.config.Configuration();
      configuration.driverConfiguration()
                   .setDriverClassName("org.neo4j.ogm.drivers.http.driver.HttpDriver")
                   .setURI("http://localhost:7474");
      return configuration;
  }
  @Bean
  public Neo4jTransactionManager transactionManager() {
      return new Neo4jTransactionManager(getSessionFactory());
  }
  @Bean
  public SessionFactory getSessionFactory() {
      return new SessionFactory("com.ksh.neo4j.domains");
  }
}

PersonRepository.java

@Repository
public interface PersonRepository extends GraphRepository<Person> {
}

PersonService.java

@Service
public class PersonService {  
  @Autowired
  private PersonRepository personRepository;

  public Person save(Person person) {
      return personRepository.save(person);
  }
}

PersonController.java

@RestController
@RequestMapping("/person/**")
public class PersonController {
  @Autowired
  private PersonService personService;

  @RequestMapping("/save")
  public ResponseObject save(@RequestBody Person person) 
  {
      try {
          personService.save(person);
          return ResponseObjectCreator.createResponseObj(ResponseStatus.SUCSESS);
      }
      catch (Exception e) {
          e.printStackTrace();
      }
      return ResponseObjectCreator.createResponseObj(ResponseStatus.FAILURE); 
  }
}

WebMvcConfig.java

 @Configuration
    @EnableWebMvc
    @ComponentScan(basePackages = {"com.ksh.neo4j.controllers", "com.ksh.neo4j"})
    public class WebMvcConfig extends WebMvcConfigurerAdapter {]
      @Override
      public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
          configurer.enable();
      }
    }

的pom.xml

<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-commons</artifactId>
  <version>1.13.1.RELEASE</version>
</dependency>
<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-neo4j</artifactId>
  <version>4.2.1.RELEASE</version>
</dependency>
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-web</artifactId>
  <version>4.3.7.RELEASE</version>
</dependency>
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-webmvc</artifactId>
  <version>4.3.7.RELEASE</version>
</dependency>
<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.1.0</version>
  <scope>compile</scope>
</dependency>
<dependency>
  <groupId>org.neo4j</groupId>
  <artifactId>neo4j-ogm-embedded-driver</artifactId>
  <version>2.1.2</version>
</dependency>
<dependency>
  <groupId>org.neo4j</groupId>
  <artifactId>neo4j-ogm-core</artifactId>
  <version>2.1.1</version>
</dependency>
<dependency>
  <groupId>org.neo4j</groupId>
  <artifactId>neo4j-ogm-http-driver</artifactId>
  <version>2.1.1</version>
</dependency>
<dependency>
  <groupId>org.neo4j</groupId>
  <artifactId>neo4j-kernel</artifactId>
  <version>3.1.3</version>
</dependency>
<dependency>
  <groupId>org.neo4j.app</groupId>
  <artifactId>neo4j-server</artifactId>
  <version>3.1.3</version>
</dependency>

我遇到了异常

引起：org.springframework.beans.BeanInstantiationException：无法实例化[org.neo4j.ogm.session.SessionFactory]：Factory 方法'getSessionFactory'抛出异常;嵌套异常是 org.neo4j.ogm.exception.ServiceNotFoundException：无法加载 driver：null。

任何帮助都会很好。

Answer 1

您没有说明您使用的是哪个版本，但如果您使用的是4.2.1，则快速启动似乎缺少事务管理器定义：

将以下内容添加到PersistenceContext类：

@Bean
public Neo4jTransactionManager transactionManager() {
    return new Neo4jTransactionManager(sessionFactory());
}

有关详细信息，请参阅spring-data-neo4j文档。

http://docs.spring.io/spring-data/data-neo4j/docs/current/reference/html/#reference.getting_started.spring-configuration

Spring Data Neo4J数据库连接

1 个答案: