Spring Boot整合neo4j

Spring Boot整合neo4j

spring-data-neo4j
版本：springboot 2.3.5 spring-data-neo4j:5.3.5

https://docs.spring.io/spring-data/neo4j/docs/5.3.5/reference/html/#getting-started

添加neo4j依赖

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

添加配置
（注意：不同版本依赖配置可能不一样），可通过neo4j自动配置类查看

# neo4j配置 
spring.data.neo4j.uri= bolt://localhost:7687 
spring.data.neo4j.username=neo4j 
spring.data.neo4j.password=12345

创建实体
@NodeEntity：标明是一个节点实体 @RelationshipEntity：标明是一个关系实体 @Id：实体主键
@Property：实体属性 @GeneratedValue：实体属性值自增 @StartNode：开始节点（可以理解为父节
点） @EndNode：结束节点（可以理解为子节点）

import lombok.Data;

import java.io.Serializable;

@Data
@Builder
@NodeEntity("person")
public class Person implements Serializable {
    @Id
    @GeneratedValue
    private Long id;
    @Property("name")
    private String name;
}

@Data
@NoArgsConstructor
@RelationshipEntity(type = "徒弟")
public class PersonRelation implements Serializable {
    @Id
    @GeneratedValue
    private Long id;
    @StartNode
    private Person parent;
    @EndNode
    private Person child;
    @Property
    private String relation;

    public PersonRelation(Person parent, Person child, String relation) {
        this.parent = parent;
        this.child = child;
        this.relation = relation;
    }
}

创建接口继承Neo4jRepository

/*** @author Fox */
@Repository
public interface PersonRelationRepository extends Neo4jRepository<PersonRelation, Long> {
}

@Repository
public interface PersonRepository extends Neo4jRepository<Person, Long> {
    /*** 查询某个节点的所有子节点 * @param pId * @return */
    @Query("Match (p:person) -[*]->(s:person) where id(p)={0} return s")
    List<Person> findChildList(Long pId);

    @Query("Match (p:person {name:{0}}) -[*]->(s:person) return s")
    List<Person> findChildList(String name);

    /**
     * 查询当前节点的父节点 * @param name * @return
     */
    @Query("Match (p:person) -[*]->(s:person {name:{0}}) return p")
    List<Person> findParentList(String name);
}