SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一

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本文来自于千锋教育在阿里云开发者社区学习中心上线课程《SpringBoot实战教程》,主讲人杨红艳,点击查看视频内容

SpringBoot整合Neo4j

添加依赖:

      <dependency> 
          <groupId>org.springframework.boot</groupId> 
          <artifactId>spring-boot-starter-data-neo4j</artifactId> 
      </dependency>

在全局配置文件application.properties中添加:

spring.data.neo4j.uri=http://localhost:7474
spring.data.neo4j.username=neo4j
spring.data.neo4j.password=123

UserNode:

//表示节点类型
@NodeEntity(label="User")
public class UserNode {

    @GraphId
    private Long nodeId;

    @Property
    private String userId;

    @Property
    private String name;

    @Property
    private int age;

//get,set方法省略
}

UserRelation:

//表示关系类型
@RelationshipEntity(type="UserRelation")
public class UserRelation {

    @GraphId
    private Long id;

    @StartNode
    private UserNode startNode;

    @EndNode
    private UserNode endNode;


//get,set方法省略
}

dao:
UserRepository:

@Component
public interface UserRepository extends GraphRepository<UserNode> {

    @Query("MATCH (n:User) RETURN n ")
    List<UserNode> getUserNodeList();

    @Query("create (n:User{age:{age},name:{name}}) RETURN n ")
    List<UserNode> addUserNodeList(@Param("name") String name, @Param("age")int age);
}

UserRelationRepository:

@Component
public interface UserRelationRepository extends GraphRepository<UserRelation> {

    @Query("match p=(n:User)<-[r:UserRelation]->(n1:User) where n.userId={firstUserId} and n1.userId={secondUserId} return p")
    List<UserRelation> findUserRelationByEachId(@Param("firstUserId") String firstUserId, @Param("secondUserId") String secondUserId);

    @Query("match (fu:User),(su:User) where fu.userId={firstUserId} and su.userId={secondUserId} create p=(fu)-[r:UserRelation]->(su) return p")
    List<UserRelation> addUserRelation(@Param("firstUserId") String firstUserId, @Param("secondUserId") String secondUserId);

}

UserService:

@Service
public class UserService {

    @Autowired
    private UserRepositoty userRepositoty; 

    public void addUserNode(UserNode userNode) {

        userRepository.addUserNodeList(userNode.getName(), userNode.getAge());
    }
}

Neo4jController:

@Controller
public class Neo4jController {

    @@Autowired
    private UserService userService;

    @RequestMapping("/saveUser")
    @ResponseBody    
    public String saveUserNode() {

        UserNode node = new UserNode();
        node.setNodeId(1l);
        node.setUserId("666");
        node.setName("张三");
        node.setAge(25);

        UserService.addUserNode(node);
        return "success";       
    }

}

在启动类中添加所有需要扫描的包:

@SpringBootApplication(scanBasePackages="com.qianfeng")
@EnableNeo4jRepositories(basePackages="com.qianfeng.dao")
@EntityScan(basePackages="com.qianfeng.pojo")

执行结果:
SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一
SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一
SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一

打包发布

1、需要打成war包
SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一
2、添加依赖:

      <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
      </dependency>

3、启动类继承SpringBootServletInitializer,重写configure方法
SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一
需要打包的工程如图所示:
SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一
SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一
war包地址:
SpringBoot如何整合Neo4j? | 带你读《SpringBoot实战教程》之三十一
然后就可以部署到自己的服务器了。

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