SpringBoot結(jié)合Neo4j自定義cypherSql的方法
更新時(shí)間：2021年11月25日 14:26:04 作者：二胖手
這篇文章主要介紹了SpringBoot結(jié)合Neo4j自定義cypherSql,本文通過(guò)實(shí)例代碼給大家介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或工作具有一定的參考借鑒價(jià)值，需要的朋友可以參考下
前言
SpringBoot引入neo4j
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-neo4j</artifactId>
</dependency>
<spring.boot.version>2.2.11.RELEASE</spring.boot.version>
大多數(shù)時(shí)候Neo4j結(jié)合springboot都是按照實(shí)體類的映射，進(jìn)行對(duì)象形式的創(chuàng)建節(jié)點(diǎn)，導(dǎo)致了節(jié)點(diǎn)屬性的不可配性。結(jié)合這種問(wèn)題，結(jié)合目前開(kāi)發(fā)經(jīng)驗(yàn)，可以使用neo4j 框架的session 進(jìn)行原生cypherSql的執(zhí)行。所以結(jié)合使用session進(jìn)行動(dòng)態(tài)可配等思路，建立一個(gè)Neo4jUtil..
Neo4jUtil作用
SpringBoot結(jié)合neo4j,自定義封裝cypherSql進(jìn)行操作。實(shí)際就是使用neo4j的Session.執(zhí)行一些cypherSql操作，然后封裝了一些方法供大家在既可以使用springboot的對(duì)象化操作方式的前提創(chuàng)建節(jié)點(diǎn)或者關(guān)系，也可以自定義繼續(xù)封裝一些特殊需求的方法，避免大家造輪子。
相關(guān)代碼
application.yml
spring:
data:
neo4j:
uri: bolt://127.0.0.1:7688
username: neo4j
password: neo4j
config
package com.troy.keeper.modules.desk.config;
import org.neo4j.ogm.session.SessionFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
import org.springframework.data.neo4j.transaction.Neo4jTransactionManager;
@Configuration
@EnableNeo4jRepositories("com.troy.keeper.desc.repository") // 聲明neo4j repository存放地址
public class Neo4jConfig {
@Value("${spring.data.neo4j.uri}")
private String uri;
@Value("${spring.data.neo4j.username}")
private String userName;
@Value("${spring.data.neo4j.password}")
private String password;
@Bean
public org.neo4j.ogm.config.Configuration getConfiguration() {
org.neo4j.ogm.config.Configuration configuration = new org.neo4j.ogm.config.Configuration.Builder().uri(uri).connectionPoolSize(100).credentials(userName, password).withBasePackages("com.troy.keeper.desc.repository").build();
return configuration;
}
@Bean
public SessionFactory sessionFactory() {
return new SessionFactory(getConfiguration());
}
@Bean("neo4jTransaction")
public Neo4jTransactionManager neo4jTransactionManager(SessionFactory sessionFactory) {
return new Neo4jTransactionManager(sessionFactory);
}
}
Entity
Neo4jBasicNode
//節(jié)點(diǎn)實(shí)體類
package com.troy.keeper.modules.desk.entity.neo4j;
import lombok.Data;
import java.io.Serializable;
import java.util.List;
import java.util.Map;
/**
* neo4j 節(jié)點(diǎn)實(shí)體類
* @author YangBM
*/
@Data
public class Neo4jBasicNode implements Serializable {
private static final long serialVersionUID = 1L;
/**
* id
*/
private Long id;
/**
* 標(biāo)簽
*/
private List<String> labels;
/**
* 標(biāo)簽屬性
*/
private Map<String, Object> property;
}
Neo4jBaiscRelation
//關(guān)系實(shí)體類
package com.troy.keeper.modules.desk.entity.neo4j;
import lombok.Data;
import java.io.Serializable;
import java.util.Map;
/**
* 關(guān)系
*/
@Data
public class Neo4jBaiscRelation implements Serializable {
private static final long serialVersionUID = 1L;
/**
* id
*/
private Long id;
/**
* 標(biāo)簽
*/
private String type;
/**
* 標(biāo)簽屬性
*/
private Map<String, Object> property;
}
Neo4jQueryRelation
//查詢關(guān)系的時(shí)候返回的對(duì)象封裝的實(shí)體類
package com.troy.keeper.modules.desk.entity.neo4j;
import lombok.Data;
import java.io.Serializable;
import java.util.Map;
/**
* 關(guān)系
* @author YangBM
*/
@Data
public class Neo4jQueryRelation implements Serializable {
private static final long serialVersionUID = 1L;
/**
* 開(kāi)始節(jié)點(diǎn)id
*/
private Long start;
/**
* 結(jié)束節(jié)點(diǎn)id
*/
private Long end;
/**
* 關(guān)系類型
*/
private String type;
/**
* id
*/
private Long id;
/**
* 標(biāo)簽屬性
*/
private Map<String, Object> property;
}
VO
Neo4jBasicRelationReturnVO
package com.troy.keeper.modules.desk.vo.neo4j;
import com.troy.keeper.modules.desk.entity.neo4j.Neo4jBasicNode;
import com.troy.keeper.modules.desk.entity.neo4j.Neo4jQueryRelation;
import lombok.Data;
import java.io.Serializable;
/**
* 基礎(chǔ)返回關(guān)系VO
* 關(guān)系
* @author YangBM
*/
@Data
public class Neo4jBasicRelationReturnVO implements Serializable {
private static final long serialVersionUID = 1L;
private Neo4jBasicNode start;
private Neo4jQueryRelation relationship;
private Neo4jBasicNode end;
}
RelationVO
package com.troy.keeper.modules.desk.vo.neo4j;
import lombok.Data;
/**
* 將關(guān)系的實(shí)體類，轉(zhuǎn)換換成cypherSql需要字符串類型的vo
* Util里面會(huì)用到
* @author YangBM
*/
@Data
public class RelationVO {
/**
* 關(guān)系名稱
*/
private String relationLabelName;
/**
* 開(kāi)始標(biāo)簽名稱
*/
private String startLabelName;
/**
* 開(kāi)始節(jié)點(diǎn)條件
*/
private String startNodeProperties;
/**
* 關(guān)系的屬性
*/
private String relationProperties;
/**
* 結(jié)束節(jié)點(diǎn)條件
*/
private String endNodeProperties;
/**
* 結(jié)束標(biāo)簽名稱
*/
private String endLabelName;
/**
* 查詢層級(jí)
*/
private String level;
}
Util
Neo4jUtil
package com.troy.keeper.modules.desk.util;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.troy.keeper.core.tool.utils.BeanUtil;
import com.troy.keeper.core.tool.utils.Func;
import com.troy.keeper.modules.desk.dto.neo4j.Neo4jSaveRelationDTO;
import com.troy.keeper.modules.desk.dto.neo4j.RelationDTO;
import com.troy.keeper.modules.desk.entity.neo4j.Neo4jBaiscRelation;
import com.troy.keeper.modules.desk.entity.neo4j.Neo4jBasicNode;
import com.troy.keeper.modules.desk.entity.neo4j.Neo4jQueryRelation;
import com.troy.keeper.modules.desk.vo.neo4j.Neo4jBasicRelationReturnVO;
import com.troy.keeper.modules.desk.vo.neo4j.RelationVO;
import lombok.SneakyThrows;
import org.apache.commons.collections.IteratorUtils;
import org.apache.commons.lang3.StringUtils;
import org.neo4j.driver.internal.InternalPath;
import org.neo4j.driver.types.Node;
import org.neo4j.driver.types.Relationship;
import org.neo4j.ogm.model.Property;
import org.neo4j.ogm.model.Result;
import org.neo4j.ogm.response.model.NodeModel;
import org.neo4j.ogm.session.Session;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;
import java.util.*;
/**
* @author YangBM
* Neo4J工具類
*/
@Component
public class Neo4jUtil {
/**
* init map序列號(hào)
*/
private static final ObjectMapper mapper = new ObjectMapper();
static {
mapper.configure(JsonGenerator.Feature.QUOTE_FIELD_NAMES, false);
}
@SneakyThrows
public static String propertiesMapToPropertiesStr(Map<String,Object> map) {
map.entrySet().removeIf(entry -> Func.isEmpty(entry.getValue()));
return mapper.writeValueAsString(map);
}
@Resource
private Session session;
public Session getSession() {
return this.session;
}
/**
* 獲取所有的標(biāo)簽名稱
*
* @return
*/
public List<String> getAllLabelName() {
String cypherSql = "match (n) return distinct labels(n) as name";
Result query = session.query(cypherSql, new HashMap<>());
ArrayList<String> labelNames = new ArrayList<>();
for (Map<String, Object> map : query.queryResults()) {
String[] names = (String[]) map.get("name");
for (String name : names) {
labelNames.add(name);
}
}
return labelNames;
}
/**
* 獲取所有的關(guān)系名稱
*
* @return
*/
public List<String> getAllRelationName() {
String cypherSql = "MATCH ()-[r]-() RETURN distinct type(r) as name";
Result query = session.query(cypherSql, new HashMap<>());
ArrayList<String> relationNames = new ArrayList<>();
for (Map<String, Object> map : query.queryResults()) {
relationNames.add(map.get("name").toString());
}
return relationNames;
}
/**
* 按條件查詢節(jié)點(diǎn)
*
* @param node
* @return 返回節(jié)點(diǎn)集合
*/
public List<Neo4jBasicNode> queryNode(Neo4jBasicNode node) {
String cypherSql = "";
if (Func.isNotEmpty(node.getId())) {
cypherSql = String.format("MATCH (n) where id(n)=%s return n", node.getId());
} else {
String labels = "";
if (Func.isNotEmpty(node.getLabels())) {
labels = ":`" + String.join("`:`", node.getLabels()) + "`";
}
String property = "";
if (Func.isNotEmpty(node.getProperty())) {
property = Neo4jUtil.propertiesMapToPropertiesStr(node.getProperty());
}
cypherSql = String.format("match(n%s%s) return n", labels, property);
}
Result query = session.query(cypherSql, new HashMap<>());
ArrayList<Neo4jBasicNode> nodeList = new ArrayList<>();
Iterable<Map<String, Object>> maps = query.queryResults();
for (Map<String, Object> map : maps) {
NodeModel queryNode = (NodeModel) map.get("n");
Neo4jBasicNode startNodeVo = new Neo4jBasicNode();
startNodeVo.setId(queryNode.getId());
startNodeVo.setLabels(Arrays.asList(queryNode.getLabels()));
List<Property<String, Object>> propertyList = queryNode.getPropertyList();
HashMap<String, Object> proMap = new HashMap<>();
for (Property<String, Object> stringObjectProperty : propertyList) {
if (proMap.containsKey(stringObjectProperty.getKey())) {
throw new RuntimeException("數(shù)據(jù)重復(fù)");
}
proMap.put(stringObjectProperty.getKey(), stringObjectProperty.getValue());
}
startNodeVo.setProperty(proMap);
nodeList.add(startNodeVo);
}
session.clear();
return nodeList;
}
/**
* 創(chuàng)建節(jié)點(diǎn)
*
* @param node 節(jié)點(diǎn)
* @param nodup 是否去重。 true去重 false不去重
* @return
*/
public boolean createNode(Neo4jBasicNode node, Boolean nodup) {
String labels = "";
if (Func.isNotEmpty(node.getLabels())) {
labels = ":`" + String.join("`:`", node.getLabels()) + "`";
}
String property = "";
if (Func.isNotEmpty(node.getProperty())) {
property = Neo4jUtil.propertiesMapToPropertiesStr(node.getProperty());
}
String cypherSql = String.format("%s(%s%s)", nodup ? "MERGE" : "create", labels, property);
Result query = session.query(cypherSql, new HashMap<>());
session.clear();
return query.queryStatistics().getNodesCreated() > 0;
}
/**
* 創(chuàng)建節(jié)點(diǎn)(不去重)
*
* @param node 節(jié)點(diǎn)
* @param
* @return
*/
public boolean createNode(Neo4jBasicNode node) {
return this.createNode(node, false);
}
/**
* 創(chuàng)建節(jié)點(diǎn)，（去重增強(qiáng)型）
* 創(chuàng)建節(jié)點(diǎn)，如果節(jié)點(diǎn)存在，先把它刪除，在重新創(chuàng)建
* 這個(gè)方法的目的是因?yàn)?createNode方法所謂的去重，是指如果 ，已有節(jié)點(diǎn)A,需要?jiǎng)?chuàng)建的節(jié)點(diǎn)B,如果A的屬性個(gè)數(shù)大于B的屬性且屬性對(duì)應(yīng)的值一模一樣，就會(huì)創(chuàng)建一個(gè)新的A。所以現(xiàn)在的方式是對(duì)B新增A中B缺少的屬性
* @param node
* @return
*/
public boolean recreateNode(Neo4jBasicNode node){
List<String> saveLabels = node.getLabels();
Map<String, Object> saveProperty = node.getProperty();
Set<String> savePropertyKeySet = saveProperty.keySet();
//查詢用屬性查詢節(jié)點(diǎn)是不是存在。
//存在比較標(biāo)簽的lable1是不是一樣。不一樣就這個(gè)查詢到的節(jié)點(diǎn)（少了就新增標(biāo)簽，多了就刪除標(biāo)簽）
Neo4jBasicNode queryNode= BeanUtil.copy(node,Neo4jBasicNode.class);
queryNode.setLabels(null);
List<Neo4jBasicNode> queryNodeList = this.queryNode(queryNode);
if (queryNodeList.isEmpty()){
return createNode(node,true);
}
for (Neo4jBasicNode neo4jBasicNode : queryNodeList) {
//處理標(biāo)簽
List<String> queryLabels = neo4jBasicNode.getLabels();
ArrayList<String> addLabels = new ArrayList<>();
for (String saveLabel : saveLabels) {
if (!queryLabels.contains(saveLabel)){
//新增標(biāo)簽
addLabels.add(saveLabel);
}
}
String addLabelStr=addLabels.isEmpty()?"":("e:"+String.join(":",addLabels));
//處理屬性
Map<String, Object> queryProperty = neo4jBasicNode.getProperty();
Set<String> queryPropertyKeySet = queryProperty.keySet();
HashMap<String, Object> addPropertyMap = new HashMap<>();
for (String savePropertyKey: savePropertyKeySet) {
if (!queryPropertyKeySet.contains(savePropertyKey)){
addPropertyMap.put(savePropertyKey,saveProperty.get(savePropertyKey));
}
}
String addPropertyStr=addPropertyMap.isEmpty()?"":(",e+="+ Neo4jUtil.propertiesMapToPropertiesStr(addPropertyMap));
if(StringUtils.isAllEmpty(addPropertyStr,addPropertyStr)){
return true;
}
String addLabelCypherSql =String.format("MERGE (e) with e where id(e)=%s set %s %s return count(e) as count",neo4jBasicNode.getId(),addLabelStr,addPropertyStr);
Result query = session.query(addLabelCypherSql, new HashMap<>());
System.out.println("跟新了："+neo4jBasicNode.getId());
session.clear();
}
//創(chuàng)建不重復(fù)節(jié)點(diǎn)
return true;
};
/**
* 批量創(chuàng)建節(jié)點(diǎn)(存在的節(jié)點(diǎn)將會(huì)被重復(fù)創(chuàng)建)
*
* @param nodeList 節(jié)點(diǎn)的list集合
* @return 創(chuàng)建成功條數(shù)
*
*/
public Long batchCreateNode(List<Neo4jBasicNode> nodeList) {
return this.batchCreateNode(nodeList, false);
}
/**
* 批量創(chuàng)建節(jié)點(diǎn)
*
* @param nodeList 節(jié)點(diǎn)的list集合
* @param nodup 是否去重。 true去重（存在的節(jié)點(diǎn)將不會(huì)被創(chuàng)建） false不去重
* @return 創(chuàng)建成功條數(shù)
*/
public Long batchCreateNode(List<Neo4jBasicNode> nodeList, Boolean nodup) {
ArrayList<Neo4jBasicNode> addNode = new ArrayList<>();
//驗(yàn)證
for (Neo4jBasicNode neo4jBasicNode : nodeList) {
if ((!nodup) || this.queryNode(neo4jBasicNode).size() == 0) {
addNode.add(neo4jBasicNode);
}
}
String cypherSql = "create";
ArrayList<String> content = new ArrayList<>();
for (Neo4jBasicNode node : addNode) {
String labels = "";
if (Func.isNotEmpty(node.getLabels())) {
labels = ":`" + String.join("`:`", node.getLabels()) + "`";
}
String property = "";
if (Func.isNotEmpty(node.getProperty())) {
property = Neo4jUtil.propertiesMapToPropertiesStr(node.getProperty());
}
content.add(String.format("(%s%s)", labels, property));
}
cypherSql += String.join(",", content);
if (content.size() == 0) {
return 0L;
}
Result query = session.query(cypherSql, new HashMap<>());
session.clear();
return Long.valueOf(query.queryStatistics().getNodesCreated());
}
/**
* 刪除節(jié)點(diǎn)和相關(guān)關(guān)系
*
* @param node 節(jié)點(diǎn)條件
* @param delRelation true 刪除節(jié)點(diǎn)相關(guān)的關(guān)系；false 只刪除不存在關(guān)系的，存在關(guān)系的節(jié)點(diǎn)將不會(huì)被刪除關(guān)系
* @return
*/
public Integer delNode(Neo4jBasicNode node, boolean delRelation) {
String cypherSql = "";
if (Func.isNotEmpty(node.getId())) {
cypherSql = String.format("MATCH (n) where id(n)=%s ", node.getId());
} else {
String labels = "";
if (Func.isNotEmpty(node.getLabels())) {
labels = ":`" + String.join("`:`", node.getLabels()) + "`";
}
String property = "";
if (Func.isNotEmpty(node.getProperty())) {
property = Neo4jUtil.propertiesMapToPropertiesStr(node.getProperty());
}
cypherSql = String.format("match(n%s%s) ", labels, property);
}
if (delRelation) {
cypherSql += "DETACH DELETE n";
} else {
//刪除不存在關(guān)系的節(jié)點(diǎn)
cypherSql += " where not exists((n)-[]-()) DELETE n";
}
Result query = session.query(cypherSql, new HashMap<>());
session.clear();
return query.queryStatistics().getNodesDeleted();
}
/**
* 刪除節(jié)點(diǎn)和相關(guān)關(guān)系
* 只刪除不存在關(guān)系的，存在關(guān)系的節(jié)點(diǎn)將不會(huì)被刪除關(guān)系
*
* @param node 節(jié)點(diǎn)條件 有關(guān)系的節(jié)點(diǎn)不會(huì)刪除
* @return
*/
public Integer delNode(Neo4jBasicNode node) {
return this.delNode(node, false);
}
public int queryNodeCreateRelation(Neo4jBasicNode start, Neo4jBasicNode end, Neo4jBaiscRelation relation) {
Neo4jSaveRelationDTO dto = new Neo4jSaveRelationDTO();
dto.setStart(start);
dto.setEnd(end);
dto.setRelationship(relation);
return queryNodeCreateRelation(dto);
}
/**
* 查詢節(jié)點(diǎn)然后創(chuàng)建關(guān)系
* 創(chuàng)建關(guān)系(查詢開(kāi)始節(jié)點(diǎn)和結(jié)束節(jié)點(diǎn)然后創(chuàng)造關(guān)系)
* 注意：開(kāi)始節(jié)點(diǎn)和結(jié)束節(jié)點(diǎn)以及創(chuàng)建的關(guān)系參數(shù)一定要存在！
* 關(guān)系如果存在，不會(huì)重復(fù)創(chuàng)建
* 因?yàn)樾枰祷貏?chuàng)建條數(shù) 當(dāng)前方法未做條件判斷
*
* @param saveRelation 關(guān)系構(gòu)造類
* @return 返回創(chuàng)建關(guān)系的個(gè)數(shù)
*/
public int queryNodeCreateRelation(Neo4jSaveRelationDTO saveRelation) {
//開(kāi)始節(jié)點(diǎn)和結(jié)束節(jié)點(diǎn)驗(yàn)證
String cypherSql = "";
String startLable = "";
if (Func.isNotEmpty(saveRelation.getStart().getLabels())) {
startLable = ":`" + String.join("`:`", saveRelation.getStart().getLabels()) + "`";
}
String startProperty = "";
if (Func.isNotEmpty(saveRelation.getStart().getProperty())) {
startProperty = Neo4jUtil.propertiesMapToPropertiesStr(saveRelation.getStart().getProperty());
}
String endLable = "";
if (Func.isNotEmpty(saveRelation.getEnd().getLabels())) {
endLable = ":`" + String.join("`:`", saveRelation.getEnd().getLabels()) + "`";
}
String endProperty = "";
if (Func.isNotEmpty(saveRelation.getEnd().getProperty())) {
endProperty = Neo4jUtil.propertiesMapToPropertiesStr(saveRelation.getEnd().getProperty());
}
String startWhere = "";
if (Func.isNotEmpty(saveRelation.getStart().getId())) {
startWhere += " where id(start)=" + saveRelation.getStart().getId();
startLable = "";
startProperty = "";
}
String endWhere = "";
if (Func.isNotEmpty(saveRelation.getEnd().getId())) {
endWhere += " where id(end)=" + saveRelation.getEnd().getId();
endLable = "";
endProperty = "";
}
String relationType = "";
if (Func.isNotEmpty(saveRelation.getRelationship().getType())) {
relationType = ":`" + saveRelation.getRelationship().getType() + "`";
}
if (Func.isEmpty(relationType)) {
throw new RuntimeException("關(guān)系名稱不能為空！");
}
String relationProperty = "";
if (Func.isNotEmpty(saveRelation.getRelationship().getProperty())) {
relationProperty = Neo4jUtil.propertiesMapToPropertiesStr(saveRelation.getRelationship().getProperty());
}
cypherSql = String.format("MATCH (start%s%s) %s with start MATCH (end%s%s) %s MERGE (start)-[rep%s%s]->(end)", startLable, startProperty, startWhere, endLable, endProperty, endWhere, relationType, relationProperty);
Result query = session.query(cypherSql, new HashMap<>());
session.clear();
return query.queryStatistics().getRelationshipsCreated();
}
/**
* 創(chuàng)建節(jié)點(diǎn)同時(shí)創(chuàng)建關(guān)系
* 重復(fù)的不會(huì)被創(chuàng)建
*
* @param saveRelation
* @return
*/
public boolean creteNodeAndRelation(Neo4jSaveRelationDTO saveRelation) {
String cypherSql = "";
String startLable = "";
if (Func.isNotEmpty(saveRelation.getStart().getLabels())) {
startLable = ":`" + String.join("`:`", saveRelation.getStart().getLabels()) + "`";
}
String startProperty = "";
if (Func.isNotEmpty(saveRelation.getStart().getProperty())) {
startProperty = Neo4jUtil.propertiesMapToPropertiesStr(saveRelation.getStart().getProperty());
}
String endLable = "";
if (Func.isNotEmpty(saveRelation.getEnd().getLabels())) {
endLable = ":`" + String.join("`:`", saveRelation.getEnd().getLabels()) + "`";
}
String endProperty = "";
if (Func.isNotEmpty(saveRelation.getEnd().getProperty())) {
endProperty = Neo4jUtil.propertiesMapToPropertiesStr(saveRelation.getEnd().getProperty());
}
String relationType = "";
if (Func.isNotEmpty(saveRelation.getRelationship().getType())) {
relationType = ":`" + saveRelation.getRelationship().getType() + "`";
}
if (Func.isEmpty(relationType)) {
throw new RuntimeException("關(guān)系名稱不能為空！");
}
String relationProperty = "";
if (Func.isNotEmpty(saveRelation.getRelationship().getProperty())) {
relationProperty = Neo4jUtil.propertiesMapToPropertiesStr(saveRelation.getRelationship().getProperty());
}
cypherSql = String.format("MERGE (start%s%s)-[rep%s%s]->(end%s%s)", startLable, startProperty, relationType, relationProperty, endLable, endProperty);
Result query = session.query(cypherSql, new HashMap<>());
session.clear();
return query.queryStatistics().getRelationshipsCreated() > 0;
}
/**
* 查詢關(guān)系
*
* @param relationDTO
* @return
*/
public List<Neo4jBasicRelationReturnVO> queryRelation(RelationDTO relationDTO) {
RelationVO relationVO = formatRelation(relationDTO);
//拼接sql
String cypherSql = String.format("MATCH p=(a%s%s)-[r%s%s]->(b%s%s)-[*0..%s]->() RETURN p", relationVO.getStartLabelName(), relationVO.getStartNodeProperties(), relationVO.getRelationLabelName(), relationVO.getRelationProperties(), relationVO.getEndLabelName(), relationVO.getEndNodeProperties(), relationVO.getLevel());
System.out.println(cypherSql);
long startTime = System.currentTimeMillis();
Result query = session.query(cypherSql, new HashMap<>());
System.out.println(String.format("耗時(shí)%d秒", System.currentTimeMillis() - startTime));
Iterable<Map<String, Object>> maps = query.queryResults();
ArrayList<Neo4jBasicRelationReturnVO> returnList = new ArrayList<>();
for (Map<String, Object> map : maps) {
InternalPath.SelfContainedSegment[] ps = (InternalPath.SelfContainedSegment[]) map.get("p");
for (InternalPath.SelfContainedSegment p : ps) {
returnList.add(changeToNeo4jBasicRelationReturnVO(p));
}
}
session.clear();
return returnList;
}
/**
* 格式化
*
* @param relationDTO
* @return
*/
public RelationVO formatRelation(RelationDTO relationDTO) {
RelationVO relationVO = new RelationVO();
//驗(yàn)證
if (Func.isNotEmpty(relationDTO.getRelationLabelName())) {
relationVO.setRelationLabelName(":`" + relationDTO.getRelationLabelName()+"`");
} else {
relationVO.setRelationLabelName("");
}
if (Func.isNotEmpty(relationDTO.getStartLabelName())) {
relationVO.setStartLabelName(":`" + relationDTO.getStartLabelName()+"`");
} else {
relationVO.setStartLabelName("");
}
if (Func.isNotEmpty(relationDTO.getEndLabelName())) {
relationVO.setEndLabelName(":`" + relationDTO.getEndLabelName()+"`");
} else {
relationVO.setEndLabelName("");
}
if (Func.isNotEmpty(relationDTO.getStartNodeProperties())) {
relationVO.setStartNodeProperties(Neo4jUtil.propertiesMapToPropertiesStr(relationDTO.getStartNodeProperties()));
} else {
relationVO.setStartNodeProperties("");
}
if (Func.isNotEmpty(relationDTO.getRelationProperties())) {
relationVO.setRelationProperties(Neo4jUtil.propertiesMapToPropertiesStr(relationDTO.getRelationProperties()));
} else {
relationVO.setRelationProperties("");
}
if (Func.isNotEmpty(relationDTO.getEndNodeProperties())) {
relationVO.setEndNodeProperties(Neo4jUtil.propertiesMapToPropertiesStr(relationDTO.getEndNodeProperties()));
} else {
relationVO.setEndNodeProperties("");
}
if (Func.isNotEmpty(relationDTO.getLevel())) {
relationVO.setLevel(relationDTO.getLevel().toString());
} else {
relationVO.setLevel("");
}
return relationVO;
}
/**
* 轉(zhuǎn)化neo4j默認(rèn)查詢的參數(shù)為自定返回類型
*
* @param selfContainedSegment
* @return Neo4jBasicRelationReturn
*/
public Neo4jBasicRelationReturnVO changeToNeo4jBasicRelationReturnVO(InternalPath.SelfContainedSegment selfContainedSegment) {
Neo4jBasicRelationReturnVO neo4JBasicRelationReturnVO = new Neo4jBasicRelationReturnVO();
//start
Node start = selfContainedSegment.start();
Neo4jBasicNode startNodeVo = new Neo4jBasicNode();
startNodeVo.setId(start.id());
startNodeVo.setLabels(IteratorUtils.toList(start.labels().iterator()));
startNodeVo.setProperty(start.asMap());
neo4JBasicRelationReturnVO.setStart(startNodeVo);
//end
Node end = selfContainedSegment.end();
Neo4jBasicNode endNodeVo = new Neo4jBasicNode();
endNodeVo.setId(end.id());
endNodeVo.setLabels(IteratorUtils.toList(end.labels().iterator()));
endNodeVo.setProperty(end.asMap());
neo4JBasicRelationReturnVO.setEnd(endNodeVo);
//relationship
Neo4jQueryRelation neo4JQueryRelation = new Neo4jQueryRelation();
Relationship relationship = selfContainedSegment.relationship();
neo4JQueryRelation.setStart(relationship.startNodeId());
neo4JQueryRelation.setEnd(relationship.endNodeId());
neo4JQueryRelation.setId(relationship.id());
neo4JQueryRelation.setType(relationship.type());
neo4JQueryRelation.setProperty(relationship.asMap());
neo4JBasicRelationReturnVO.setRelationship(neo4JQueryRelation);
return neo4JBasicRelationReturnVO;
}
}
到此這篇關(guān)于SpringBoot結(jié)合Neo4j自定義cypherSql的文章就介紹到這了,更多相關(guān)SpringBoot自定義cypherSql內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
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