diff --git a/spring-boot-demo-neo4j/README.md b/spring-boot-demo-neo4j/README.md index 26931d3..b1d82c3 100644 --- a/spring-boot-demo-neo4j/README.md +++ b/spring-boot-demo-neo4j/README.md @@ -12,5 +12,328 @@ 4. 启动容器：`docker start neo4j-3.5.0` 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 +## pom.xml +```xml + + + 4.0.0 + spring-boot-demo-neo4j + 1.0.0-SNAPSHOT + jar + + spring-boot-demo-neo4j + Demo project for Spring Boot + + + com.xkcoding + spring-boot-demo + 1.0.0-SNAPSHOT + + + + UTF-8 + UTF-8 + 1.8 + + + + + org.springframework.boot + spring-boot-starter-data-neo4j + + + + org.springframework.boot + spring-boot-starter-web + + + + org.springframework.boot + spring-boot-starter-test + test + + + + org.projectlombok + lombok + true + + + + cn.hutool + hutool-all + + + + com.google.guava + guava + + + + + spring-boot-demo-neo4j + + + org.springframework.boot + spring-boot-maven-plugin + + + + + +``` + +## application.yml + +```yaml +spring: + data: + neo4j: + uri: bolt://localhost + username: neo4j + password: admin + open-in-view: false +``` + +## CustomIdStrategy.java + +```java +/** + *

+ * 自定义主键策略 + *

+ * + * @package: com.xkcoding.neo4j.config + * @description: 自定义主键策略 + * @author: yangkai.shen + * @date: Created in 2018-12-24 14:40 + * @copyright: Copyright (c) 2018 + * @version: V1.0 + * @modified: yangkai.shen + */ +public class CustomIdStrategy implements IdStrategy { + @Override + public Object generateId(Object o) { + return IdUtil.fastUUID(); + } +} +``` + +## 部分Model代码 + +### Student.java + +```java +/** + *

+ * 学生节点 + *

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

+ * 学生节点Repository + *

+ * + * @package: com.xkcoding.neo4j.repository + * @description: 学生节点Repository + * @author: yangkai.shen + * @date: Created in 2018-12-24 15:05 + * @copyright: Copyright (c) 2018 + * @version: V1.0 + * @modified: yangkai.shen + */ +public interface StudentRepository extends Neo4jRepository { + /** + * 根据名称查找学生 + * + * @param name 姓名 + * @param depth 深度 + * @return 学生信息 + */ + Optional findByName(String name, @Depth int depth); + + /** + * 根据班级查询班级人数 + * + * @param className 班级名称 + * @return 班级人数 + */ + @Query("MATCH (s:Student)-[r:R_STUDENT_OF_CLASS]->(c:Class{name:{className}}) return count(s)") + Long countByClassName(@Param("className") String className); + + + /** + * 查询满足 (学生)-[选课关系]-(课程)-[选课关系]-(学生) 关系的 同学 + * + * @return 返回同学关系 + */ + @Query("match (s:Student)-[:R_LESSON_OF_STUDENT]->(l:Lesson)<-[:R_LESSON_OF_STUDENT]-(:Student) with l.name as lessonName,collect(distinct s) as students return lessonName,students") + List findByClassmateGroupByLesson(); + + /** + * 查询师生关系，(学生)-[班级学生关系]-(班级)-[班主任关系]-(教师) + * + * @return 返回师生关系 + */ + @Query("match (s:Student)-[:R_STUDENT_OF_CLASS]->(:Class)-[:R_BOSS_OF_CLASS]->(t:Teacher) with t.name as teacherName,collect(distinct s) as students return teacherName,students") + List findTeacherStudentByClass(); + + /** + * 查询师生关系，(学生)-[选课关系]-(课程)-[任教老师关系]-(教师) + * + * @return 返回师生关系 + */ + @Query("match ((s:Student)-[:R_LESSON_OF_STUDENT]->(:Lesson)-[:R_TEACHER_OF_LESSON]->(t:Teacher))with t.name as teacherName,collect(distinct s) as students return teacherName,students") + List findTeacherStudentByLesson(); +} +``` + +## Neo4jTest.java + +```java +/** + *

+ * 测试Neo4j + *

+ * + * @package: com.xkcoding.neo4j + * @description: 测试Neo4j + * @author: yangkai.shen + * @date: Created in 2018-12-24 15:17 + * @copyright: Copyright (c) 2018 + * @version: V1.0 + * @modified: yangkai.shen + */ +@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 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> 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> 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())))); + } +} +``` + +## 截图 + +运行测试类之后，可以通过访问 http://localhost:7474 ，查看neo里所有节点和关系 + +![image-20181225150513101](assets/image-20181225150513101-5721513.png) + + + +## 参考 + +- spring-data-neo4j 官方文档：https://docs.spring.io/spring-data/neo4j/docs/5.1.2.RELEASE/reference/html/ +- neo4j 官方文档：https://neo4j.com/docs/getting-started/3.5/ \ No newline at end of file diff --git a/spring-boot-demo-neo4j/assets/image-20181225150513101-5721513.png b/spring-boot-demo-neo4j/assets/image-20181225150513101-5721513.png new file mode 100644 index 0000000..9c3d4de Binary files /dev/null and b/spring-boot-demo-neo4j/assets/image-20181225150513101-5721513.png differ