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✨ spring-boot-demo-neo4j 完成
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‎spring-boot-demo-neo4j/README.md

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# spring-boot-demo-neo4j
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> 此 demo 主要演示了 Spring Boot 如何集成Neo4j操作图数据库，实现一个校园人物关系网。
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## 注意
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作者编写本demo时，Neo4j 版本为 `3.5.0`，使用 docker 运行，下面是所有步骤：
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1. 下载镜像：`docker pull neo4j:3.5.0`
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2. 运行容器：`docker run -d -p 7474:7474 -p 7687:7687 --name neo4j-3.5.0 neo4j:3.5.0`
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3. 停止容器：`docker stop neo4j-3.5.0`
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4. 启动容器：`docker start neo4j-3.5.0`
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5. 浏览器 http://localhost:7474/ 访问 neo4j 管理后台，初始账号/密码 neo4j/neo4j，会要求修改初始化密码，我们修改为 neo4j/admin
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‎spring-boot-demo-neo4j/pom.xml

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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>cn.hutool</groupId>
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<artifactId>hutool-all</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.guava</groupId>
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<artifactId>guava</artifactId>
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</dependency>
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</dependencies>
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<build>

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/config/CustomIdStrategy.java

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package com.xkcoding.neo4j.config;
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import cn.hutool.core.util.IdUtil;
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import org.neo4j.ogm.id.IdStrategy;
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/**
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* <p>
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* 自定义主键策略
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* </p>
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*
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* @package: com.xkcoding.neo4j.config
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* @description: 自定义主键策略
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 14:40
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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public class CustomIdStrategy implements IdStrategy {
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@Override
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public Object generateId(Object o) {
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return IdUtil.fastUUID();
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}
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}

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/constants/NeoConsts.java

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package com.xkcoding.neo4j.constants;
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/**
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* <p>
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* 常量池
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* </p>
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*
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* @package: com.xkcoding.neo4j.constants
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* @description: 常量池
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 14:45
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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public interface NeoConsts {
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/**
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* 关系：班级拥有的学生
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*/
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String R_STUDENT_OF_CLASS = "R_STUDENT_OF_CLASS";
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/**
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* 关系：班级的班主任
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*/
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String R_BOSS_OF_CLASS = "R_BOSS_OF_CLASS";
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/**
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* 关系：课程的老师
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*/
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String R_TEACHER_OF_LESSON = "R_TEACHER_OF_LESSON";
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/**
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* 关系：学生选的课
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*/
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String R_LESSON_OF_STUDENT = "R_LESSON_OF_STUDENT";
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}

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/model/Class.java

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package com.xkcoding.neo4j.model;
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import com.xkcoding.neo4j.config.CustomIdStrategy;
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import com.xkcoding.neo4j.constants.NeoConsts;
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import lombok.*;
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import org.neo4j.ogm.annotation.GeneratedValue;
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import org.neo4j.ogm.annotation.Id;
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import org.neo4j.ogm.annotation.NodeEntity;
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import org.neo4j.ogm.annotation.Relationship;
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/**
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* <p>
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* 班级节点
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* </p>
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*
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* @package: com.xkcoding.neo4j.model
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* @description: 班级节点
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 14:44
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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@Data
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@NoArgsConstructor
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@RequiredArgsConstructor(staticName = "of")
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@AllArgsConstructor
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@Builder
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@NodeEntity
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public class Class {
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/**
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* 主键
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*/
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@Id
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@GeneratedValue(strategy = CustomIdStrategy.class)
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private String id;
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/**
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* 班级名称
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*/
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@NonNull
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private String name;
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/**
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* 班级的班主任
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*/
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@Relationship(NeoConsts.R_BOSS_OF_CLASS)
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@NonNull
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private Teacher boss;
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}

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/model/Lesson.java

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package com.xkcoding.neo4j.model;
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import com.xkcoding.neo4j.config.CustomIdStrategy;
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import com.xkcoding.neo4j.constants.NeoConsts;
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import lombok.*;
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import org.neo4j.ogm.annotation.GeneratedValue;
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import org.neo4j.ogm.annotation.Id;
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import org.neo4j.ogm.annotation.NodeEntity;
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import org.neo4j.ogm.annotation.Relationship;
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/**
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* <p>
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* 课程节点
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* </p>
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*
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* @package: com.xkcoding.neo4j.model
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* @description: 课程节点
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 14:55
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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@Data
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@NoArgsConstructor
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@RequiredArgsConstructor(staticName = "of")
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@AllArgsConstructor
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@Builder
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@NodeEntity
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public class Lesson {
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/**
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* 主键，自定义主键策略，使用UUID生成
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*/
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@Id
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@GeneratedValue(strategy = CustomIdStrategy.class)
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private String id;
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/**
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* 课程名称
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*/
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@NonNull
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private String name;
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/**
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* 任教老师
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*/
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@Relationship(NeoConsts.R_TEACHER_OF_LESSON)
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@NonNull
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private Teacher teacher;
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}

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/model/Student.java

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package com.xkcoding.neo4j.model;
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import com.xkcoding.neo4j.config.CustomIdStrategy;
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import com.xkcoding.neo4j.constants.NeoConsts;
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import lombok.*;
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import org.neo4j.ogm.annotation.GeneratedValue;
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import org.neo4j.ogm.annotation.Id;
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import org.neo4j.ogm.annotation.NodeEntity;
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import org.neo4j.ogm.annotation.Relationship;
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import java.util.List;
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/**
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* <p>
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* 学生节点
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* </p>
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*
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* @package: com.xkcoding.neo4j.model
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* @description: 学生节点
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 14:38
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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@Data
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@NoArgsConstructor
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@RequiredArgsConstructor(staticName = "of")
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@AllArgsConstructor
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@Builder
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@NodeEntity
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public class Student {
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/**
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* 主键，自定义主键策略，使用UUID生成
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*/
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@Id
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@GeneratedValue(strategy = CustomIdStrategy.class)
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private String id;
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/**
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* 学生姓名
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*/
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@NonNull
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private String name;
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/**
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* 学生选的所有课程
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*/
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@Relationship(NeoConsts.R_LESSON_OF_STUDENT)
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@NonNull
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private List<Lesson> lessons;
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/**
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* 学生所在班级
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*/
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@Relationship(NeoConsts.R_STUDENT_OF_CLASS)
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@NonNull
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private Class clazz;
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}

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/model/Teacher.java

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package com.xkcoding.neo4j.model;
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import com.xkcoding.neo4j.config.CustomIdStrategy;
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import lombok.*;
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import org.neo4j.ogm.annotation.GeneratedValue;
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import org.neo4j.ogm.annotation.Id;
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import org.neo4j.ogm.annotation.NodeEntity;
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/**
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* <p>
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* 教师节点
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* </p>
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*
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* @package: com.xkcoding.neo4j.model
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* @description: 教师节点
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 14:54
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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@Data
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@NoArgsConstructor
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@RequiredArgsConstructor(staticName = "of")
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@AllArgsConstructor
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@Builder
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@NodeEntity
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public class Teacher {
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/**
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* 主键，自定义主键策略，使用UUID生成
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*/
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@Id
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@GeneratedValue(strategy = CustomIdStrategy.class)
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private String id;
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/**
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* 教师姓名
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*/
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@NonNull
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private String name;
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}

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/payload/ClassmateInfoGroupByLesson.java

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package com.xkcoding.neo4j.payload;
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import com.xkcoding.neo4j.model.Student;
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import lombok.Data;
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import org.springframework.data.neo4j.annotation.QueryResult;
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import java.util.List;
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/**
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* <p>
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* 按照课程分组的同学关系
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* </p>
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*
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* @package: com.xkcoding.neo4j.payload
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* @description: 按照课程分组的同学关系
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 19:18
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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@Data
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@QueryResult
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public class ClassmateInfoGroupByLesson {
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/**
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* 课程名称
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*/
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private String lessonName;
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/**
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* 学生信息
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*/
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private List<Student> students;
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}

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/repository/ClassRepository.java

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package com.xkcoding.neo4j.repository;
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import com.xkcoding.neo4j.model.Class;
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import org.springframework.data.neo4j.repository.Neo4jRepository;
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import java.util.Optional;
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/**
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* <p>
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* 班级节点Repository
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* </p>
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*
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* @package: com.xkcoding.neo4j.repository
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* @description: 班级节点Repository
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 15:05
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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public interface ClassRepository extends Neo4jRepository<Class, String> {
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/**
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* 根据班级名称查询班级信息
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*
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* @param name 班级名称
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* @return 班级信息
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*/
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Optional<Class> findByName(String name);
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}

‎spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/repository/LessonRepository.java

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package com.xkcoding.neo4j.repository;
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import com.xkcoding.neo4j.model.Lesson;
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import org.springframework.data.neo4j.repository.Neo4jRepository;
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/**
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* <p>
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* 课程节点Repository
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* </p>
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*
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* @package: com.xkcoding.neo4j.repository
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* @description: 课程节点Repository
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* @author: yangkai.shen
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* @date: Created in 2018-12-24 15:05
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* @copyright: Copyright (c) 2018
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* @version: V1.0
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* @modified: yangkai.shen
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*/
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public interface LessonRepository extends Neo4jRepository<Lesson, String> {
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}

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