我正在設(shè)計(jì)一個(gè)信標(biāo)網(wǎng)絡(luò)，其中信標(biāo)彼此相鄰，使用 Neo4j 數(shù)據(jù)庫(kù)，其中它具有一個(gè)實(shí)體和一個(gè)關(guān)系類(lèi)。我需要檢索兩個(gè)信標(biāo)之間的關(guān)系，但無(wú)法弄清楚如何。這是兩個(gè)類(lèi)燈塔類(lèi)public class Beacon {    @Id    private String MAC;    private String description;    private String location;    @Relationship(type = "ADJACENT")    private List<Adjacent> adjacentList = new ArrayList<>();    public Beacon() {    }    public Beacon(String MAC, String description, String location) {        this.MAC = MAC;        this.description = description;        this.location = location;    }    public void addAdjacency(Adjacent adjacent){        if (this.adjacentList==null){            this.adjacentList=new ArrayList<>();        }        this.adjacentList.add(adjacent);    }//Getters and Setters are excluded}相鄰關(guān)系類(lèi)public class Adjacent {    @Id    @GeneratedValue    private Long id;    private int angle;    private int cost;    @StartNode    private Beacon startBeacon;    @EndNode    private Beacon endBeacon;    public Adjacent() {    }    public Adjacent(int angle, int cost, Beacon startBeacon, Beacon endBeacon) {        this.angle = angle;        this.cost = cost;        this.startBeacon = startBeacon;        this.endBeacon = endBeacon;    }//Getters and Setters are excluded}我已經(jīng)嘗試創(chuàng)建一個(gè)存儲(chǔ)庫(kù)并進(jìn)行檢索，但即使查詢?cè)?Neo4j 瀏覽器中有效，它也不會(huì)在此處檢索任何數(shù)據(jù)，只是空白括號(hào)。public interface AdjacentRepository extends Neo4jRepository<Adjacent,Long> {@Query("match (b:Beacon{MAC:\"f:f:f:f\"})-[a:ADJACENT]-(c:Beacon{MAC:\"r:r:r:r\") return a")    Adjacent findaRelationshipp();}任何幫助是極大的贊賞。