Spring Data Neo4J数据库连接

Question

我想用Spring数据连接到Neo4J数据库使用以下链接（http://projects.spring.io/spring-data-neo4j/#quick-start）。但它似乎并不奏效。它无法自行创建Repository Implementation。这就是为什么我得到BeanCreationException。这里我到目前为止尝试过。

1. 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); 
    } 
} 

1. 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> 

我得到以下例外

所致：org.springframework.beans.BeanInstantiationException： 无法实例[org.neo4j.ogm.session.SessionFactory]：出厂 方法 '提供了getSessionFactory' 抛出异常;嵌套的异常是 org.neo4j.ogm.exception.ServiceNotFoundException：无法加载 driver：null。

任何帮助都会很好。

Answer 1

你没有说你正在使用的版本，但如果你正在使用4.2.1然后快速启动似乎缺少事务管理的定义：

添加下列内容PersistenceContext类：

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

请参阅spring-data-neo4j文档以获取更多详细信息。

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