技術標籤：spring bootneo4j

提到spring boot整合Neo4j,一般都會提到spring-data-neo4j,使用類似於jpa的方式,使用entity去maintain,但是如果想要新增動態關係或者動態的node,就算是@Query也是不夠用了

使用OGM

其實這個包也被spring-data-neo4j引入了,所以不必要單獨引入

import org.neo4j.ogm.session.Session;
import org.neo4j.ogm.session.SessionFactory;
import org.slf4j.Logger;
import
 
 org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.neo4j.ogm.model.Result;

@Service
public class NodeService {

    private final Logger log = LoggerFactory.getLogger(NodeService.class);

    @Autowired
    private
 
 SessionFactory sessionFactory;

    public Result searchPath(SearchPathDTO searchPathDTO) {
        String cypher = "MATCH (n:" + searchPathDTO.getFromNode() + "{" + searchPathDTO.getProperity() + ":'"
                + searchPathDTO.getValue() + "'}) "
                +
 
 "CALL apoc.path.subgraphAll(n,{relationshipFilter: '<|>',minLevel: 0,maxLevel: -1}) "
                + "YIELD nodes,relationships RETURN nodes, relationships";
        Session session = sessionFactory.openSession();
        return session.query(cypher, new HashMap<>(), false);
    }
  }

這樣以來,就可以動態拼接cypher,更加靈活,可以實現更加複雜的查詢了.