springboot集成Neo4j，代码示例

写在前面

本文基于 Docker 搭建 Neo4J服务，提供web管理页面

详细搭建过程，可参考这里 Neo4J示例练习

更多学习，可官网自行学习，官网

一、项目搭建

Maven 工程

1.1、pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="maven.apache./POM/4.0.0" xmlns:xsi="w3./2001/XMLSchema-instance"xsi:schemaLocation="maven.apache./POM/4.0.0 maven.apache./xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><artifactId>spring-boot-demo-neo4j</artifactId><version>1.0.0-SNAPSHOT</version><packaging>jar</packaging><name>spring-boot-demo-neo4j</name><description>Demo project for Spring Boot</description><parent><groupId>.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.0.RELEASE</version><relativePath /> <!-- lookup parent from repository --></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version></properties><dependencies><dependency><groupId>.springframework.boot</groupId><artifactId>spring-boot-starter-data-neo4j</artifactId></dependency><dependency><groupId>.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>.hutool</groupId><artifactId>hutool-all</artifactId><version>5.0.0</version></dependency><dependency><groupId>.google.guava</groupId><artifactId>guava</artifactId><version>28.2-jre</version></dependency></dependencies><build><finalName>spring-boot-demo-neo4j</finalName><plugins><plugin><groupId>.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

1.2、application.yml配置

spring:data:neo4j:uri: bolt://192.168.1.74:7687username: neo4jpassword: adminopen-in-view: false

二、测试

package .tonels.neo4j;import .hutool.json.JSONUtil;
import .tonels.neo4j.service.NeoService;
import .tonels.neo4j.model.Lesson;
import .tonels.neo4j.model.Student;
import lombok.extern.slf4j.Slf4j;
import .junit.Test;
import .springframework.beans.factory.annotation.Autowired;import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;@Slf4j
public class Neo4jTest extends SpringBootDemoNeo4jApplicationTests {@Autowiredprivate NeoService neoService;/*** 测试保存*/@Testpublic void testSave() {neoService.initData();}/*** 测试删除*/@Testpublic void testDelete() {neoService.delete();}/*** 测试查询 鸣人 学了哪些课程*/@Testpublic void testFindLessonsByStudent() {// 深度为1，则课程的任教老师的属性为null// 深度为2，则会把课程的任教老师的属性赋值List<Lesson> lessons = neoService.findLessonsFromStudent("漩涡鸣人", 2);lessons.forEach(lesson -> log.info("【lesson】= {}", JSONUtil.toJsonStr(lesson)));}/*** 测试查询班级人数*/@Testpublic void testCountStudent() {Long all = neoService.studentCount(null);log.info("【全校人数】= {}", all);Long seven = neoService.studentCount("第七班");log.info("【第七班人数】= {}", seven);}/*** 测试根据课程查询同学关系*/@Testpublic void testFindClassmates() {Map<String, List<Student>> classmates = neoService.findClassmatesGroupByLesson();classmates.forEach((k, v) -> log.info("因为一起上了【{}】这门课，成为同学关系的有：{}", k, JSONUtil.toJsonStr(v.stream().map(Student::getName).collect(Collectors.toList()))));}/*** 查询所有师生关系，包括班主任/学生，任课老师/学生*/@Testpublic void testFindTeacherStudent() {Map<String, Set<Student>> teacherStudent = neoService.findTeacherStudent();teacherStudent.forEach((k, v) -> log.info("【{}】教的学生有 {}", k, JSONUtil.toJsonStr(v.stream().map(Student::getName).collect(Collectors.toList()))));}
}

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