springboot集成Neo4j，代码示例

怼烎@ 2023-02-23 05:06 20阅读 0赞

## 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][Neo4J]

更多学习，可官网自行学习，[官网][Link 1]

## 一、项目搭建 ##

Maven 工程

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70]

### 1.1、pom.xml ###

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/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>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.1.0.RELEASE</version>
            <relativePath /> 
        </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>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-neo4j</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
    
            <dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-all</artifactId>
                <version>5.0.0</version>
            </dependency>
    
            <dependency>
                <groupId>com.google.guava</groupId>
                <artifactId>guava</artifactId>
                <version>28.2-jre</version>
            </dependency>
        </dependencies>
    
        <build>
            <finalName>spring-boot-demo-neo4j</finalName>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    </project>

### 1.2、application.yml配置 ###

spring:
      data:
        neo4j:
          uri: bolt://192.168.1.74:7687
          username: neo4j
          password: admin
          open-in-view: false

## 二、测试 ##

package com.tonels.neo4j;
    
    import cn.hutool.json.JSONUtil;
    import com.tonels.neo4j.service.NeoService;
    import com.tonels.neo4j.model.Lesson;
    import com.tonels.neo4j.model.Student;
    import lombok.extern.slf4j.Slf4j;
    import org.junit.Test;
    import org.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 { 
        @Autowired
        private NeoService neoService;
    
        /** * 测试保存 */
        @Test
        public void testSave() { 
            neoService.initData();
        }
    
        /** * 测试删除 */
        @Test
        public void testDelete() { 
            neoService.delete();
        }
    
        /** * 测试查询 鸣人 学了哪些课程 */
        @Test
        public 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 */
        @Test
        public 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 */
        @Test
        public 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 */
        @Test
        public 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()))));
        }
    }

篇幅有限，无法摘出所有部分 ，本文所有 代码，可在这里找到 [**Gitee地址**][Gitee]

[Neo4J]: https://blog.csdn.net/qq_42105629/article/details/107131706
[Link 1]: https://www.baidu.com/link?url=Nu2XUQBML8LfK_kKYDC7Nyi_Fa54EFzJFNKg79MQEc3&wd=&eqid=8ace3f850013db89000000045f01781c
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/2020070514525721.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5,size_16,color_FFFFFF,t_70
[Gitee]: https://gitee.com/tonels/MultiProject/tree/master/boot-neo4j