✨ spring-boot-demo-neo4j 完成

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

@@ -0,0 +1,34 @@
+package com.xkcoding.neo4j.payload;
+
+import com.xkcoding.neo4j.model.Student;
+import lombok.Data;
+import org.springframework.data.neo4j.annotation.QueryResult;
+
+import java.util.List;
+
+/**
+ * <p>
+ * 师生关系
+ * </p>
+ *
+ * @package: com.xkcoding.neo4j.payload
+ * @description: 师生关系
+ * @author: yangkai.shen
+ * @date: Created in 2018-12-24 19:18
+ * @copyright: Copyright (c) 2018
+ * @version: V1.0
+ * @modified: yangkai.shen
+ */
+@Data
+@QueryResult
+public class TeacherStudent {
+    /**
+     * 教师姓名
+     */
+    private String teacherName;
+
+    /**
+     * 学生信息
+     */
+    private List<Student> students;
+}

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

@@ -2,6 +2,7 @@ package com.xkcoding.neo4j.repository;
 
 import com.xkcoding.neo4j.model.Student;
 import com.xkcoding.neo4j.payload.ClassmateInfoGroupByLesson;
+import com.xkcoding.neo4j.payload.TeacherStudent;
 import org.springframework.data.neo4j.annotation.Depth;
 import org.springframework.data.neo4j.annotation.Query;
 import org.springframework.data.neo4j.repository.Neo4jRepository;
@@ -43,6 +44,27 @@ public interface StudentRepository extends Neo4jRepository<Student, String> {
     Long countByClassName(@Param("className") String className);
 
 
-    @Query("match (s:Student)-[:R_LESSON_OF_STUDENT]->(l:Lesson),(l:Lesson)<-[:R_LESSON_OF_STUDENT]-(:Student) with l.name as lessonName,collect(distinct s) as students return lessonName,students")
+    /**
+     * 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<ClassmateInfoGroupByLesson> 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<TeacherStudent> 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<TeacherStudent> findTeacherStudentByLesson();
 }

spring-boot-demo-neo4j/src/main/java/com/xkcoding/neo4j/service/NeoService.java

@@ -3,11 +3,13 @@ package com.xkcoding.neo4j.service;
 import cn.hutool.core.util.StrUtil;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
 import com.xkcoding.neo4j.model.Class;
 import com.xkcoding.neo4j.model.Lesson;
 import com.xkcoding.neo4j.model.Student;
 import com.xkcoding.neo4j.model.Teacher;
 import com.xkcoding.neo4j.payload.ClassmateInfoGroupByLesson;
+import com.xkcoding.neo4j.payload.TeacherStudent;
 import com.xkcoding.neo4j.repository.ClassRepository;
 import com.xkcoding.neo4j.repository.LessonRepository;
 import com.xkcoding.neo4j.repository.StudentRepository;
@@ -21,7 +23,7 @@ import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
 import java.util.Map;
-import java.util.stream.Collectors;
+import java.util.Set;
 
 /**
  * <p>
@@ -163,4 +165,23 @@ public class NeoService {
 
         return result;
     }
+
+    /**
+     * 查询所有师生关系，包括班主任/学生，任课老师/学生
+     *
+     * @return 师生关系
+     */
+    public Map<String, Set<Student>> findTeacherStudent() {
+        List<TeacherStudent> teacherStudentByClass = studentRepo.findTeacherStudentByClass();
+        List<TeacherStudent> teacherStudentByLesson = studentRepo.findTeacherStudentByLesson();
+        Map<String, Set<Student>> result = Maps.newHashMap();
+
+        teacherStudentByClass.forEach(teacherStudent -> result.put(teacherStudent.getTeacherName(), Sets.newHashSet(teacherStudent
+                .getStudents())));
+
+        teacherStudentByLesson.forEach(teacherStudent -> result.put(teacherStudent.getTeacherName(), Sets.newHashSet(teacherStudent
+                .getStudents())));
+
+        return result;
+    }
 }

spring-boot-demo-neo4j/src/test/java/com/xkcoding/neo4j/Neo4jTest.java

@@ -10,6 +10,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 /**
@@ -79,4 +80,15 @@ public class Neo4jTest extends SpringBootDemoNeo4jApplicationTests {
                 .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()))));
+    }
 }