springboot集成neo4j，使用继承Neo4jRepository的方式来实现对数据的操作

package com.neo4j.controller; import com.neo4j.domain.Movie; import com.neo4j.domain.Person; import com.neo4j.domain.Roles; import com.neo4j.domain.SystemEntity; import com.neo4j.repository.MovieRepository; import com.neo4j.repository.PersonRepository; import com.neo4j.repository.SystemRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.Page; import org.springframework.data.domain.PageRequest; import org.springframework.data.domain.Sort; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.*; import java.util.Collections; import java.util.List; @Controller @RequestMapping("/neo4j") public class Neo4jController { @Autowired private MovieRepository movieRepository; @Autowired private PersonRepository personRepository; @Autowired private SystemRepository systemRepository; /** * 使用repository操作图数据 * * @return */ @GetMapping("/testByRepository") @ResponseBody public List testByRepository() { // 删除所有节点和关系（删除节点会响应删除关联关系），避免后续创建节点重复影响 movieRepository.deleteAll(); personRepository.deleteAll(); // 创建节点 Movie movie = new Movie("流浪地球", "是由中国电影股份有限公司、北京京西文化旅游股份有限公司、郭帆文化传媒（北京）有限公司、北京登峰国际文化传播有限公司联合出品，由郭帆执导，吴京特别出演、屈楚萧、赵今麦、李光洁、吴孟达等领衔主演的科幻冒险电影"); // 添加关系 movie.getActorsAndRoles().add(new Roles(new Person(1994, "刘启"), Collections.singletonList("初级驾驶员"))); movie.getActorsAndRoles().add(new Roles(new Person(2002, "刘培强"), Collections.singletonList("中国航天员"))); movie.getActorsAndRoles().add(new Roles(new Person(1952, "韩子昂"), Collections.singletonList("高级驾驶员"))); movie.getActorsAndRoles().add(new Roles(new Person(2002, "韩朵朵"), Collections.singletonList("初中生"))); movie.getActorsAndRoles().add(new Roles(new Person(1981, "王磊"), Collections.singletonList("救援队队长"))); movie.getActorsAndRoles().add(new Roles(new Person(1991, "李一一"), Collections.singletonList("技术观察员"))); movie.getActorsAndRoles().add(new Roles(new Person(1974, "何连科"), Collections.singletonList("救援队队员"))); movie.getActorsAndRoles().add(new Roles(new Person(1991, "Tim"), Collections.singletonList("中美混血儿"))); movie.getDirectors().add(new Person(1974, "吴京")); // 存入图数据库持久化 movieRepository.save(movie); // 查询 Person person = personRepository.findPersonEntityByName("刘启"); System.out.println(person); Movie movie1 = movieRepository.findMovieByTitle("流浪地球"); System.out.println(movie1); Movie movie2 = movieRepository.findMovieById(movie.getId()); System.out.println(movie2); // 注意：repository的save方法【对应的实体若id一致】则为修改，否则为新建。 person.setBorn(1997); personRepository.save(person); person = personRepository.findPersonEntityByName("刘启"); List all = personRepository.findAll(); return all; } /** * 新增SystemEntity节点 */ @GetMapping("/addSystemNode") public void addSystemNode() { systemRepository.deleteAll(); SystemEntity systemEntity = new SystemEntity(); systemEntity.setName("系统A"); // 26 systemRepository.save(systemEntity); System.out.println("系统A" + "----------" + systemEntity.getId()); SystemEntity systemEntity1 = new SystemEntity(); systemEntity1.setName("系统B");// 27 systemRepository.save(systemEntity1); System.out.println("系统B" + "----------" + systemEntity1.getId()); SystemEntity systemEntity2 = new SystemEntity(); systemEntity2.setName("系统C");// 28 systemRepository.save(systemEntity2); System.out.println("系统C" + "----------" + systemEntity2.getId()); SystemEntity systemEntity3 = new SystemEntity(); systemEntity3.setName("系统D");// 29 systemRepository.save(systemEntity3); System.out.println("系统D" + "----------" + systemEntity3.getId()); SystemEntity systemEntity4 = new SystemEntity(); systemEntity4.setName("系统E");// 30 systemRepository.save(systemEntity4); System.out.println("系统E" + "----------" + systemEntity4.getId()); SystemEntity systemEntity5 = new SystemEntity(); systemEntity5.setName("系统F");// 31 systemRepository.save(systemEntity5); System.out.println("系统F" + "----------" + systemEntity5.getId()); } @GetMapping("/addInvokeRelation") public void addInvokeRelation() { systemRepository.addInvokeRelation(26L, 27L); systemRepository.addInvokeRelation(26L, 28L); systemRepository.addInvokeRelation(29L, 26L); systemRepository.addInvokeRelation(29L, 28L); systemRepository.addInvokeRelation(29L, 28L); } @GetMapping("/addConsumeRelation") public void addConsumeRelation() { systemRepository.addConsumeRelation(30L, 31L); systemRepository.addConsumeRelation(29L, 30L); } // 分页查询 @GetMapping("/pageListSystem") @ResponseBody public List pageListSystem(String name) { PageRequest pageRequest = PageRequest.of(0, 4, Sort.by(Sort.Direction.DESC, "name")); Page page = systemRepository.findByName(name, pageRequest); List list = page.getContent(); list.forEach(System.out::println); return list; } /** * 删除指定节点直接的关系 DELETE ,, * * @return */ @DeleteMapping("/deleteConsumeRelation") @ResponseBody public String deleteConsumeRelation2() { try { Long from = 28L, to = 29L; systemRepository.deleteConsumeRelation(from, to); } catch (Exception e) { e.printStackTrace(); return "删除关系失败"; } return "删除关系成功"; } @GetMapping("/findSystemById") @ResponseBody public SystemEntity findSystemById(@RequestParam("id") Long id) { SystemEntity systemEntity = systemRepository.findSystemById(id); return systemEntity; } @GetMapping("/getAllSystemNode") @ResponseBody public List getAllSystemNode() { List all = systemRepository.findAll(); return all; } }