├── .gitignore ├── .mvn └── wrapper │ ├── maven-wrapper.jar │ └── maven-wrapper.properties ├── LICENSE ├── README.assets ├── 0fad0888c59a4bc9926cf8d0f9cf4747-166459206322819.png ├── 0fad0888c59a4bc9926cf8d0f9cf4747.png ├── 13e802a8204a446b8db456e93c9adbf2-166459206322711.png ├── 13e802a8204a446b8db456e93c9adbf2.png ├── 2e113747692c49f2a4dec5b32426d59f-166459206322817.png ├── 2e113747692c49f2a4dec5b32426d59f.png ├── 2e64e34ec03248dd979c24950912febe-166459206322813.png ├── 2e64e34ec03248dd979c24950912febe.png ├── 42ef26fb571d47a8a5d07f7ee3354aeb-166459206322829.png ├── 42ef26fb571d47a8a5d07f7ee3354aeb.png ├── 481d8a2da4dd4795a1a4599dc6f7007d-166459206322825.png ├── 481d8a2da4dd4795a1a4599dc6f7007d.png ├── 57d40a76d9064a929e99b21b5688881c-166459206322815.png ├── 57d40a76d9064a929e99b21b5688881c.png ├── a0040e87dac7493a9010db78310a712d-166459206322821.png ├── a0040e87dac7493a9010db78310a712d.png ├── b5bd2091bdb9492eb0cdc1c799389803-166459206322823.png ├── b5bd2091bdb9492eb0cdc1c799389803.png ├── cd5b960021364a95a49f3fd74ecf93c9-166459206322827.png ├── cd5b960021364a95a49f3fd74ecf93c9.png ├── image-20221001001446042.png ├── image-20221001002632392.png ├── image-20221001002916937.png ├── image-20221001003711714.png ├── image-20221001004300071.png ├── image-20221001005043795.png ├── image-20221001010539182.png ├── image-20221001013404903.png ├── image-20221001095201874.png ├── image-20221001095933081.png ├── image-20221001101818186.png └── image-20221001101839212.png ├── README.md ├── mvnw ├── mvnw.cmd ├── pom.xml └── src ├── main ├── java │ └── com │ │ └── example │ │ └── neo4jdemo │ │ ├── Example.java │ │ ├── Neo4jDemoApplication.java │ │ ├── entity │ │ ├── MovieEntity.java │ │ ├── PersonEntity.java │ │ └── Roles.java │ │ ├── repository │ │ ├── MovieRepository.java │ │ └── PersonRepository.java │ │ └── utils │ │ └── ExampleCommandLineRunner.java └── resources │ └── application.yml └── test └── java └── com └── example └── neo4jdemo └── Neo4jDemoApplicationTests.java /.gitignore: -------------------------------------------------------------------------------- 1 | HELP.md 2 | target/ 3 | !.mvn/wrapper/maven-wrapper.jar 4 | !**/src/main/**/target/ 5 | !**/src/test/**/target/ 6 | 7 | ### STS ### 8 | .apt_generated 9 | .classpath 10 | .factorypath 11 | .project 12 | .settings 13 | .springBeans 14 | .sts4-cache 15 | 16 | ### IntelliJ IDEA ### 17 | .idea 18 | *.iws 19 | *.iml 20 | *.ipr 21 | 22 | ### NetBeans ### 23 | /nbproject/private/ 24 | /nbbuild/ 25 | /dist/ 26 | /nbdist/ 27 | /.nb-gradle/ 28 | build/ 29 | !**/src/main/**/build/ 30 | !**/src/test/**/build/ 31 | 32 | ### VS Code ### 33 | .vscode/ 34 | -------------------------------------------------------------------------------- /.mvn/wrapper/maven-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/WuYiheng-Og/neo4j_springboot/c129b347c1e4a536340cec961c2cdae7c8b0c3bb/.mvn/wrapper/maven-wrapper.jar -------------------------------------------------------------------------------- /.mvn/wrapper/maven-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.6/apache-maven-3.8.6-bin.zip 2 | wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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-------------------------------------------------------------------------------- 1 | # SpringBoot整合Neo4j，最新版本适用，超通俗详细讲解 2 | 3 | ## 0.前言 4 | 5 | 跟着班导师做项目的时候遇到社交网络的部分，而传统的关系数据库不能很好解决数据之间的关系，因此采用图数据的方式进行存储。Neo4j算是主流的图数据库，多应用于知识图谱、社交网络等。 6 | 7 | 这两天学习SpringBoot时碰到了很多问题 8 | 9 | - [springboot集合neo4j引用了org.neo4j的包，报错Required identifier property not found for class](https://ask.csdn.net/questions/7658608) 10 | - [用SpringBoot集成neo4j，查询报错Could not find mappable nodes or relationships inside Record](https://ask.csdn.net/questions/7659061) 11 | - org.springframework.data.neo4j.core.schema中没有@NodeEntity，@StartNode，@EndNode 12 | - RelationShip无法注解在实体关系类中 13 | - nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.*neo4j*.ogm.session.*SessionFactory*] sessionFactory找不到 14 | 15 | 看了[(128条消息) 【最新】Neo4j官方建议Spring Boot 2.4.及以上版本用Neo4j Java Driver代替The Spring Boot starter_学到一寸是一寸的博客-CSDN博客](https://blog.csdn.net/ccnice99/article/details/123420884)的博客后才知道是因为**SpringBoot版本较高（2.4以上）时集成的Neo4j的API规则方法在变化**。但是他的博客还是没有说明如何使用类似@Node的注解，自己特意去查了Neo4j官方文档和Spring Neo4j的官方文档并进行总结整理发出来。 16 | 17 | --------- 18 | 19 | 本文将解决的问题 20 | 21 | - SpringBoot高版本（2.4以上）+Neo4j的配置 22 | - 使用@Node等注解操作简化Neo4j 23 | - 一些简单的cypherQuery（很类似MySQL的SQL语句）用法解释 24 | - 利用Repository（类似MyBatisPlus操作的Mapper接口）对图数据进行CRUD 25 | - 不使用Repository而使用Neo4jTemplate直接对图数据进行CRUD 26 | 27 | TODO 28 | 29 | - id的生成 30 | - 分页查询 31 | 32 | --- 33 | 34 | 本文将会结合官网的一个 【导演-电影-演员】关系图来进行实现。以新海诚导演的《你的名字》为例。 35 | 36 | ![](https://img-blog.csdnimg.cn/13e802a8204a446b8db456e93c9adbf2.png) 37 | 38 | 39 | ```json 40 | [ 41 | { 42 | "n": { 43 | "identity": 10, 44 | "labels": [ 45 | "Movie" 46 | ], 47 | "properties": { 48 | "tagline": "影片讲述了男女高中生在梦中相遇，并寻找彼此的故事。", 49 | "title": "你的名字" 50 | } 51 | } 52 | }, 53 | { 54 | "n": { 55 | "identity": 11, 56 | "labels": [ 57 | "Person" 58 | ], 59 | "properties": { 60 | "born": 1997, 61 | "name": "上白石萌音" 62 | } 63 | } 64 | }, 65 | { 66 | "n": { 67 | "identity": 12, 68 | "labels": [ 69 | "Person" 70 | ], 71 | "properties": { 72 | "born": 1993, 73 | "name": "神木隆之介" 74 | } 75 | } 76 | }, 77 | { 78 | "n": { 79 | "identity": 13, 80 | "labels": [ 81 | "Person" 82 | ], 83 | "properties": { 84 | "born": 1973, 85 | "name": "新海诚" 86 | } 87 | } 88 | } 89 | ] 90 | ``` 91 | 92 | 93 | 94 | ## 1.初始化Spring Boot项目添加依赖 95 | 96 | **注：本文所使用SpringBoot版本为2.7.4，Java8；（Java8+均可）,neo4j的安装不再赘述，请提前安装配置好** 97 | 98 | ### 1.初始化项目，添加依赖 99 | 100 | 指定对应的SpringBoot版本（注意本文适配2.4版本及以上）和相应的依赖，当然也可以后续pom依赖中添加坐标（注意pom有两个neo4j相关的依赖） 101 | 102 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/2e64e34ec03248dd979c24950912febe.png) 103 | 104 | 105 | ```xml 106 | 107 | org.springframework.boot 108 | spring-boot-starter-parent 109 | 2.7.4 110 | 111 | 112 | com.example 113 | Neo4jDemo 114 | 0.0.1-SNAPSHOT 115 | Neo4jDemo 116 | Neo4jDemo 117 | 118 | 8 119 | 120 | 121 | 122 | 123 | 124 | org.neo4j.driver 125 | neo4j-java-driver 126 | 127 | 128 | 129 | org.springframework.boot 130 | spring-boot-starter-data-neo4j 131 | 132 | 133 | 134 | org.projectlombok 135 | lombok 136 | true 137 | 138 | 139 | org.springframework.boot 140 | spring-boot-starter-test 141 | test 142 | 143 | 144 | ``` 145 | 146 | ### 2.配置Neo4j 147 | 148 | ```yaml 149 | spring: 150 | neo4j: 151 | uri: bolt://:7687 152 | authentication: 153 | username: 154 | password: 155 | # 指定数据库 156 | data: 157 | neo4j: 158 | database: 159 | ``` 160 | 161 | 创建`utils`包，并在该包下创建`ExampleCommandLineRunner`来装配Driver和Session 162 | 163 | ```java 164 | package com.example.neo4jdemo.utils; 165 | 166 | import lombok.extern.slf4j.Slf4j; 167 | import org.neo4j.driver.*; 168 | import org.springframework.boot.CommandLineRunner; 169 | import org.springframework.context.ConfigurableApplicationContext; 170 | import org.springframework.context.annotation.Bean; 171 | import org.springframework.stereotype.Component; 172 | 173 | @Component 174 | @Slf4j 175 | public class ExampleCommandLineRunner implements CommandLineRunner { 176 | 177 | private final Driver driver; 178 | private final ConfigurableApplicationContext applicationContext; 179 | public final Session session; 180 | 181 | @Bean 182 | Session session(){ 183 | return session; 184 | } 185 | 186 | // Autowire the Driver bean by constructor injection 187 | public ExampleCommandLineRunner(Driver driver, ConfigurableApplicationContext applicationContext) { 188 | this.driver = driver; 189 | this.applicationContext = applicationContext; 190 | this.session = driver.session(); 191 | 192 | } 193 | 194 | @Override 195 | public void run(String... args) throws Exception { 196 | } 197 | } 198 | ``` 199 | 200 | ## 2.创建实体类节点 201 | 202 | ### 1.节点 203 | 204 | 节点介绍： 205 | 206 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/57d40a76d9064a929e99b21b5688881c.png) 207 | 208 | 209 | 创建`entity`包，添加实体类：`PersonEntity`和`MovieEntity` 210 | 211 | ```java 212 | package com.example.neo4jdemo.entity; 213 | 214 | import lombok.Data; 215 | import org.springframework.data.neo4j.core.schema.GeneratedValue; 216 | import org.springframework.data.neo4j.core.schema.Id; 217 | import org.springframework.data.neo4j.core.schema.Node; 218 | 219 | 220 | @Node("Person") 221 | @Data 222 | public class PersonEntity { 223 | @Id 224 | @GeneratedValue 225 | private Long id; 226 | private String name; 227 | private Integer born; 228 | public PersonEntity(Integer born, String name) { 229 | this.name = name; 230 | this.born = born; 231 | } 232 | } 233 | 234 | ``` 235 | 236 | ```java 237 | package com.example.neo4jdemo.entity; 238 | 239 | import lombok.Data; 240 | import org.springframework.data.neo4j.core.schema.*; 241 | 242 | import java.util.ArrayList; 243 | import java.util.List; 244 | 245 | /** 246 | * Movie实体类，一个neo4j的节点 247 | */ 248 | @Node(labels = "Movie") // 标签名，labels可以缺省 249 | @Data 250 | public class MovieEntity { 251 | 252 | @Id 253 | @GeneratedValue // Id自增 254 | private Long id; 255 | 256 | private final String title; 257 | 258 | @Property("tagline") // 映射到neo4j的属性名 259 | private final String description; 260 | 261 | public MovieEntity(String title, String description) { 262 | this.id = null;// 生成node时自动生成 263 | this.title = title; 264 | this.description = description; 265 | } 266 | 267 | // 用户指定特定的Id 268 | public MovieEntity withId(Long id) { 269 | if (this.id!= null && this.id.equals(id)) { 270 | return this; 271 | } else { 272 | MovieEntity newObject = new MovieEntity(this.title, this.description); 273 | newObject.id = id; 274 | return newObject; 275 | } 276 | } 277 | } 278 | ``` 279 | 280 | 281 | 282 | > 1.withId在需要指定节点id而非自动生成时使用。 283 | > 284 | > 2.注意到除了id外的属性均被final修饰，一种构造优化，提高执行效率:(来自[Spring Data Neo4j](https://docs.spring.io/spring-data/neo4j/docs/current/reference/html/#faq.path-mapping)) 285 | > 286 | > This gives us a roundabout 25% performance boost over reflection. For the domain class to be eligible for such optimization, it needs to adhere to a set of constraints: 287 | > 288 | > - Types must not reside in the default or under the `java` package. 289 | > - Types and their constructors must be `public` 290 | > - Types that are inner classes must be `static`. 291 | > - The used Java Runtime must allow for declaring classes in the originating `ClassLoader`. Java 9 and newer impose certain limitations. 292 | > 293 | > By default, Spring Data attempts to use generated property accessors and falls back to reflection-based ones if a limitation is detected. 294 | > 295 | > 296 | 297 | ### 2.节点间的关系 298 | 299 | 关系解释：（以ACTED_IN即参演关系为例） 300 | 301 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/2e113747692c49f2a4dec5b32426d59f.png) 302 | 303 | 304 | 创建`Roles`和完善`MovieEntity` 305 | 306 | ```java 307 | package com.example.neo4jdemo.entity; 308 | 309 | import org.springframework.data.neo4j.core.schema.RelationshipId; 310 | import org.springframework.data.neo4j.core.schema.RelationshipProperties; 311 | import org.springframework.data.neo4j.core.schema.TargetNode; 312 | 313 | import java.util.List; 314 | 315 | /** 316 | * 定义一个关系属性 317 | */ 318 | @RelationshipProperties 319 | public class Roles { 320 | 321 | @RelationshipId 322 | private Long id; 323 | 324 | private final List roles; 325 | 326 | @TargetNode // 相当于@StartNode 327 | private final PersonEntity person; 328 | 329 | // 参数1是目标关系实体节点 参数2是关系属性 330 | // Roles 参数1：Person实体，演员的出生年和姓名；参数2：演员名字列表（考虑到一个演员可能参演多个角色） 331 | public Roles(PersonEntity person, List roles) { 332 | this.person = person; 333 | this.roles = roles; 334 | } 335 | 336 | public List getRoles() { 337 | return roles; 338 | } 339 | } 340 | 341 | ``` 342 | 343 | 344 | 345 | 注意这些关系**`@TargetNode`修饰的是关系箭头的尾部, 最终的箭头指向是当前实体**，即`TargetNode（PersonEntity）->当前定义Relationship的实体（MovieEntity）` 346 | 347 | 348 | 349 | ```java 350 | package com.example.neo4jdemo.entity; 351 | 352 | import lombok.Data; 353 | import org.springframework.data.neo4j.core.schema.*; 354 | 355 | import java.util.ArrayList; 356 | import java.util.List; 357 | 358 | /** 359 | * Movie实体类，一个neo4j的节点 360 | */ 361 | @Node(labels = "Movie") // 标签名，labels可以缺省 362 | @Data 363 | public class MovieEntity { 364 | 365 | ...(上面 1.节点 有) 366 | 367 | // 定义一个关系（参演） 368 | @Relationship(type = "ACTED_IN", direction = Relationship.Direction.INCOMING) 369 | private List actorsAndRoles = new ArrayList<>(); 370 | // 定义一个关系（导演） 371 | @Relationship(type = "DIRECTED", direction = Relationship.Direction.INCOMING) 372 | private List directors = new ArrayList<>(); 373 | // 注意这些关系最终的箭头指向是当前实体，即TargetNode（PersonEntity）->当前定义Relationship的实体（MovieEntity） 374 | 375 | } 376 | ``` 377 | 378 | ## 3.CRUD 379 | 380 | #### Cypher Query基本使用 381 | 382 | 了解即可，有封装好的api使用，可以先跳过不看，看3.b部分。 383 | 384 | >1. **创建** 385 | > 386 | >```cypher 387 | ># 查询name等于 $name 的 label为Person的实体类集合 388 | >MATCH (n:Person {name: $name}) RETURN n 389 | >或者 390 | >MATCH (n:Person) WHERE n.name = $name RETURN n 391 | >``` 392 | > 393 | >1. n是一个变量 394 | >2. $name 对应map的key 395 | >3. { } 是 where 筛选的简写 396 | >4. Return 返回符合筛选条件的变量n 397 | > 398 | > 399 | > 400 | >2. **查找** 401 | > 402 | >```cypher 403 | ># 查询Person和Movie之间 关系种类为ACTED_IN且关系属性role = $roles 的实体类集合 404 | >MATCH (person:Person) -[ relation:ACTED_IN ]-> (movie:Movie) 405 | >WHERE relation.roles = $roles 406 | >RETURN person 407 | >等价于 408 | >MATCH (person:Person) -[ relation:ACTED_IN ]-> (:Movie) 409 | >WHERE relation.roles = $roles 410 | >RETURN person 411 | >``` 412 | > 413 | >1. person、relation、movie是变量 414 | >2. :Person 、:Movie 用：后面接Label，`person:Person`有点类似变量声明，如果不使用完全可以省略不写 415 | >3. 用-[]-> 来表示关系的type以及指向 416 | > 417 | > 418 | > 419 | >3. **修改** 420 | > 421 | >```cypher 422 | ># 新增属性(Person本来只有name和born属性，新增age属性，一般不用) 423 | >MATCH (n:Person) 424 | >WHERE n.name = '新海诚' 425 | >SET n.age = 50 426 | > 427 | ># 修改属性 428 | >MATCH (n:Person) 429 | >WHERE n.name = "新津城" 430 | >SET n.name = "新海诚" 431 | > 432 | ># 新增/修改多个属性 433 | >MATCH (n:Person) 434 | >WHERE n.name = '新海诚' 435 | >SET n.age = 50, n.name="新津城" 436 | >``` 437 | > 438 | > 439 | > 440 | >4. **删除** 441 | > 442 | >```cypher 443 | ># 删除属性（一般不用） 444 | >MATCH (n:Person) 445 | >WHERE n.name = "新津城" 446 | >REMOVE n.age 447 | ># 删除关系（新海诚的导演关系删除） 448 | >MATCH (n:Person) -[k:DIRECTED]-> (m:Movie) 449 | >WHERE n="新海诚" 450 | >DELETE k 451 | ># 删除节点 452 | >MATCH (n:Person) 453 | >WHERE n.name = "新海诚" 454 | >DELETE n // 当该实体仍有关系时会报错，必须先删除关系再删除节点 455 | > 456 | ># 删除节点（会删除节点实体和他关联的属性） 457 | >MATCH (n:Person) 458 | >WHERE n.name = "新海诚" 459 | >DETACH DELETE n 460 | >``` 461 | 462 | ## 3.a 使用Neo4jTemplate对图数据进行CRUD 463 | 464 | #### 1.创建节点和关系 465 | 466 | ```java 467 | // 创建节点实体 468 | 469 | MovieEntity movie = new MovieEntity("你的名字","影片讲述了男女高中生在梦中相遇，并寻找彼此的故事。");// 电影实体节点 470 | 471 | // 定义（参演）关系 472 | // new Roles 参数1：Person实体，演员的出生年和姓名；参数2：演员名字列表（考虑到一个演员可能参演多个角色） 473 | // 参数1是目标关系实体节点 参数2是关系属性 474 | Roles roles1 = new Roles(new PersonEntity(1998,"上白石萌音"), Collections.singletonList("宫水三叶")); 475 | Roles roles2 = new Roles(new PersonEntity(1993,"神木隆之介"), Collections.singletonList("立花泷")); 476 | PersonEntity director = new PersonEntity(1973,"新海诚"); 477 | 478 | // 添加movie的演员实体，加入（参演）关系 479 | movie.getActorsAndRoles().add(roles1); 480 | movie.getActorsAndRoles().add(roles2); 481 | movie.getDirectors().add(director); 482 | 483 | // 存入图数据库持久化 484 | neo4jTemplate.save(movie); 485 | ``` 486 | 487 | 结果： 488 | 489 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/0fad0888c59a4bc9926cf8d0f9cf4747.png) 490 | 491 | 492 | #### 2.查询节点 493 | 494 | ```java 495 | // 查询（不太推荐用Neo4jTemplate进行过滤查询，因为需要手动写cypherQuery,需要开发人员了解一下cypherQuery的写法） 496 | Optional person; 497 | // 1. 通过id查询 498 | person = neo4jTemplate.findById(12, PersonEntity.class); 499 | System.out.println("id为12号的Person节点：\n"+person); 500 | 501 | // 2. 通过属性查询节点，如name 需要手写cypherQuery语句 502 | Map map = new HashMap<>(); 503 | map.put("name","新海诚"); 504 | // 两种写法都对，看个人喜好 n是一个变量随意取，{}或者where填写query的filter过滤条件 505 | person = neo4jTemplate.findOne("MATCH (n:Person {name: $name}) RETURN n",map, PersonEntity.class); 506 | // person = neo4jTemplate.findOne("MATCH (n:Person) WHERE n.name = $name RETURN n",map, PersonEntity.class); 507 | System.out.println("\n查询名字为新海诚的Person节点:\n"+person); 508 | 509 | // 3. 通过属性关系查询节点 510 | map = new HashMap<>(); 511 | map.put("roles",Collections.singletonList("宫水三叶")); 512 | // 方法1.使用toExecutableQuery查询 513 | QueryFragmentsAndParameters parameters = new QueryFragmentsAndParameters( 514 | "MATCH (person:Person) -[ relation:ACTED_IN]-> (movie:Movie) \n" + 515 | "WHERE relation.roles = $roles\n" + 516 | "RETURN person",map); 517 | List roles = neo4jTemplate.toExecutableQuery(PersonEntity.class, parameters).getResults(); 518 | // 方法2.使用findOne查询 519 | // Optional roles = neo4jTemplate.findOne( 520 | // "MATCH (person:Person) -[ relation:ACTED_IN]-> (movie:Movie) \n" + 521 | // "WHERE relation.roles = $roles\n" + 522 | // "RETURN person",map,PersonEntity.class); 523 | 524 | System.out.println("\n查询角色为“宫水三叶”的演员：\n"+roles); 525 | ``` 526 | 527 | 结果： 528 | 529 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/a0040e87dac7493a9010db78310a712d.png) 530 | 531 | 532 | > 533 | 534 | #### 3.更新节点信息 535 | 536 | ```java 537 | Long userId = person.get().getId();// 记录当前查询的"新海诚"的节点id 538 | // 更新①---------更新“新海诚”的name为曾用名“新津诚”（这是他的曾用名） 539 | map.put("name","新海诚"); 540 | map.put("usedName","新津诚"); 541 | QueryFragmentsAndParameters queryFragmentsAndParameters = 542 | new QueryFragmentsAndParameters( 543 | "MATCH (n:Person{name: $name}) SET n.name = $usedName", 544 | map); 545 | neo4jTemplate.toExecutableQuery( 546 | PersonEntity.class, 547 | queryFragmentsAndParameters).getResults(); 548 | Optional person1 = neo4jTemplate.findById(userId, PersonEntity.class); 549 | System.out.println("\n更新“新海诚”的name为曾用名“新津诚”（这是他的曾用名）:\n"+person1); 550 | // 更新②---------更新“新津诚”的name为“新海诚” 551 | person.get().setName("新海诚"); 552 | neo4jTemplate.save(person.get()); 553 | Optional person2 = neo4jTemplate.findById(userId, PersonEntity.class); 554 | System.out.println("\n更新“新津诚”的name为“新海诚”:\n"+person2); 555 | ``` 556 | 557 | 结果： 558 | 559 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/b5bd2091bdb9492eb0cdc1c799389803.png) 560 | 561 | 562 | #### 4.删除节点 563 | 564 | ```java 565 | // 删除所有节点和关系（删除节点会响应删除关联关系）[也可以用cypherQuery执行，不再赘述] 566 | neo4jTemplate.deleteAll(MovieEntity.class); 567 | neo4jTemplate.deleteAll(PersonEntity.class); 568 | ``` 569 | 570 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/481d8a2da4dd4795a1a4599dc6f7007d.png) 571 | 572 | 573 | 上方的api根据实际情况使用，不再赘述。 574 | 575 | #### 5.完整代码 576 | 577 | ```java 578 | /** 579 | * 没有Repository情况下使用Neo4jTemplate操作数据 580 | * @param neo4jTemplate 581 | */ 582 | @Test 583 | void TestNoRepository(@Autowired Neo4jTemplate neo4jTemplate){ 584 | // 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 585 | neo4jTemplate.deleteAll(MovieEntity.class); 586 | neo4jTemplate.deleteAll(PersonEntity.class); 587 | // 创建节点实体 588 | MovieEntity movie = new MovieEntity("你的名字","影片讲述了男女高中生在梦中相遇，并寻找彼此的故事。"); 589 | 590 | // new Roles 参数1：Person实体，演员的出生年和姓名；参数2：演员名字列表（考虑到一个演员可能参演多个角色） 591 | // 参数1是目标关系实体节点 参数2是关系属性 592 | Roles roles1 = new Roles(new PersonEntity(1998,"上白石萌音"), Collections.singletonList("宫水三叶")); 593 | Roles roles2 = new Roles(new PersonEntity(1993,"神木隆之介"), Collections.singletonList("立花泷")); 594 | PersonEntity director = new PersonEntity(1973,"新海诚"); 595 | // 添加movie的演员实体，加入（参演）关系 596 | movie.getActorsAndRoles().add(roles1); 597 | movie.getActorsAndRoles().add(roles2); 598 | movie.getDirectors().add(director); 599 | 600 | // 存入图数据库持久化 601 | neo4jTemplate.save(movie); 602 | 603 | // 查询（不太推荐用Neo4jTemplate进行过滤查询，因为需要手动写cypherQuery,需要开发人员了解一下cypherQuery的写法） 604 | Optional person; 605 | // 1. 通过id查询 606 | person = neo4jTemplate.findById(12, PersonEntity.class); 607 | System.out.println("id为12号的Person节点：\n"+person); 608 | 609 | // 2. 通过属性查询节点，如name 需要手写cypherQuery语句 610 | Map map = new HashMap<>(); 611 | map.put("name","新海诚"); 612 | // 两种写法都对，看个人喜好 n是一个变量随意取，{}或者where填写query的filter过滤条件 613 | person = neo4jTemplate.findOne("MATCH (n:Person {name: $name}) RETURN n",map, PersonEntity.class); 614 | // person = neo4jTemplate.findOne("MATCH (n:Person) WHERE n.name = $name RETURN n",map, PersonEntity.class); 615 | System.out.println("\n查询名字为新海诚的Person节点:\n"+person); 616 | 617 | // 3. 通过属性关系查询节点 618 | map = new HashMap<>(); 619 | map.put("roles",Collections.singletonList("宫水三叶")); 620 | // 方法1.使用toExecutableQuery查询 621 | QueryFragmentsAndParameters parameters = new QueryFragmentsAndParameters( 622 | "MATCH (person:Person) -[ relation:ACTED_IN]-> (movie:Movie) \n" + 623 | "WHERE relation.roles = $roles\n" + 624 | "RETURN person",map); 625 | List roles = neo4jTemplate.toExecutableQuery(PersonEntity.class, parameters).getResults(); 626 | // 方法2.使用findOne查询 627 | // Optional roles = neo4jTemplate.findOne( 628 | // "MATCH (person:Person) -[ relation:ACTED_IN]-> (movie:Movie) \n" + 629 | // "WHERE relation.roles = $roles\n" + 630 | // "RETURN person",map,PersonEntity.class); 631 | System.out.println("\n查询角色为“宫水三叶”的演员：\n"+roles); 632 | 633 | Long userId = person.get().getId();// 记录当前查询的"新海诚"的节点id 634 | // 更新①---------更新“新海诚”的name为曾用名“新津诚”（这是他的曾用名） 635 | map.put("name","新海诚"); 636 | map.put("usedName","新津诚"); 637 | QueryFragmentsAndParameters queryFragmentsAndParameters = 638 | new QueryFragmentsAndParameters( 639 | "MATCH (n:Person{name: $name}) SET n.name = $usedName", 640 | map); 641 | neo4jTemplate.toExecutableQuery( 642 | PersonEntity.class, 643 | queryFragmentsAndParameters).getResults(); 644 | Optional person1 = neo4jTemplate.findById(userId, PersonEntity.class); 645 | System.out.println("\n更新“新海诚”的name为曾用名“新津诚”（这是他的曾用名）:\n"+person1); 646 | // 更新②---------更新“新津诚”的name为“新海诚” 647 | person.get().setName("新海诚"); 648 | neo4jTemplate.save(person.get()); 649 | Optional person2 = neo4jTemplate.findById(userId, PersonEntity.class); 650 | System.out.println("\n更新“新津诚”的name为“新海诚”:\n"+person2); 651 | 652 | } 653 | ``` 654 | 655 | ## 3.b 使用repository对图数据进行CRUD 656 | 657 | ### 1.创建Repository 658 | 659 | 新建`repository`包，创建`PersonRepository`和`MovieRepository` 660 | 661 | ```java 662 | package com.example.neo4jdemo.repository; 663 | 664 | import com.example.neo4jdemo.entity.PersonEntity; 665 | import org.springframework.data.neo4j.repository.Neo4jRepository; 666 | import org.springframework.stereotype.Repository; 667 | 668 | @Repository 669 | public interface PersonRepository extends Neo4jRepository { 670 | } 671 | ``` 672 | 673 | ```java 674 | package com.example.neo4jdemo.repository; 675 | 676 | import com.example.neo4jdemo.entity.MovieEntity; 677 | import org.springframework.data.neo4j.repository.Neo4jRepository; 678 | import org.springframework.data.neo4j.repository.query.Query; 679 | import org.springframework.stereotype.Repository; 680 | 681 | import java.util.List; 682 | 683 | @Repository 684 | public interface MovieRepository extends Neo4jRepository { 685 | } 686 | ``` 687 | 688 | ### 2.创建节点和关系 689 | 690 | ```java 691 | // 创建节点 692 | MovieEntity movie = new MovieEntity("你的名字","影片讲述了男女高中生在梦中相遇，并寻找彼此的故事。"); 693 | Roles roles1 = new Roles(new PersonEntity(1998,"上白石萌音"), Collections.singletonList("宫水三叶")); 694 | Roles roles2 = new Roles(new PersonEntity(1993,"神木隆之介"), Collections.singletonList("立花泷")); 695 | PersonEntity director = new PersonEntity(1973,"新海诚"); 696 | // 添加关系 697 | movie.getActorsAndRoles().add(roles1); 698 | movie.getActorsAndRoles().add(roles2); 699 | movie.getDirectors().add(director); 700 | // 存入图数据库持久化 701 | movieRepository.save(movie); 702 | ``` 703 | 704 | ### 3.查询 705 | 706 | 需求：根据Person的名字查询对应节点 707 | 708 | 在`PersonRepository`中添加方法： 709 | 710 | ```java 711 | @Repository 712 | public interface PersonRepository extends Neo4jRepository { 713 | PersonEntity findPersonEntityByName(String name); 714 | } 715 | ``` 716 | 717 | 在`MovieRepository`中添加方法： 718 | 719 | ```java 720 | @Repository 721 | public interface MovieRepository extends Neo4jRepository { 722 | 723 | // @Query("MATCH (n:Movie) WHERE id(n) = $0 RETURN n") 这种方法是自己写Query语句进行查询 724 | List findMovieEntitiesById(Long id); 725 | MovieEntity findMovieEntityByTitle(String title); 726 | } 727 | ``` 728 | 729 | 查询： 730 | 731 | ```java 732 | // 查询 733 | // 查询 734 | PersonEntity person = personRepository.findPersonEntityByName("上白石萌音"); 735 | System.out.println("查询名字为“上白石萌音”的PersonEntity："+person); 736 | MovieEntity movieQueried = movieRepository.findMovieEntityByTitle("你的名字"); 737 | System.out.println("查询名字为“你的名字”的MovieEntity："+movieQueried); 738 | ``` 739 | 740 | 结果： 741 | 742 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/cd5b960021364a95a49f3fd74ecf93c9.png) 743 | 744 | 745 | ```bash 746 | 查询名字为“上白石萌音”的PersonEntity： 747 | PersonEntity(id=15, name=上白石萌音, born=1998) 748 | 749 | 查询名字为“你的名字”的MovieEntity： 750 | MovieEntity(id=14, title=你的名字, description=影片讲述了男女高中生在梦中相遇，并寻找彼此的故事。, actorsAndRoles=[com.example.neo4jdemo.entity.Roles@d902300, com.example.neo4jdemo.entity.Roles@2db33feb], directors=[PersonEntity(id=17, name=新海诚, born=1973)]) 751 | ``` 752 | 753 | ### 4.更新 754 | 755 | ```java 756 | // 更新(更新主要是三步：1.获取实体id；2.修改实体属性；3.更新实体） 757 | // 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。 758 | Long personId = person.getId(); 759 | person.setBorn(1997); 760 | personRepository.save(person); 761 | person = personRepository.findPersonEntityByName("上白石萌音"); 762 | System.out.println(personId == person.getId()?"\n更新“上白石萌音”出生日期为1997信息成功！：\n"+person:"更新信息失败！"); 763 | ``` 764 | 765 | ![在这里插入图片描述](https://img-blog.csdnimg.cn/42ef26fb571d47a8a5d07f7ee3354aeb.png) 766 | 767 | 768 | ### 5.删除 769 | 770 | ```java 771 | // 删除所有节点和关系 772 | movieRepository.deleteAll(); 773 | personRepository.deleteAll(); 774 | ``` 775 | 776 | ### 6.完整代码 777 | 778 | ```java 779 | /** 780 | * 使用repository操作图数据 781 | */ 782 | @Test 783 | void testByRepository(@Autowired MovieRepository movieRepository, @Autowired PersonRepository personRepository){ 784 | // 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 785 | movieRepository.deleteAll(); 786 | personRepository.deleteAll(); 787 | 788 | // 创建节点 789 | MovieEntity movie = new MovieEntity("你的名字","影片讲述了男女高中生在梦中相遇，并寻找彼此的故事。"); 790 | Roles roles1 = new Roles(new PersonEntity(1998,"上白石萌音"), Collections.singletonList("宫水三叶")); 791 | Roles roles2 = new Roles(new PersonEntity(1993,"神木隆之介"), Collections.singletonList("立花泷")); 792 | PersonEntity director = new PersonEntity(1973,"新海诚"); 793 | // 添加关系 794 | movie.getActorsAndRoles().add(roles1); 795 | movie.getActorsAndRoles().add(roles2); 796 | movie.getDirectors().add(director); 797 | // 存入图数据库持久化 798 | movieRepository.save(movie); 799 | 800 | // 查询 801 | PersonEntity person = personRepository.findPersonEntityByName("上白石萌音"); 802 | System.out.println("\n查询名字为“上白石萌音”的PersonEntity：\n"+person); 803 | MovieEntity movieQueried = movieRepository.findMovieEntityByTitle("你的名字"); 804 | System.out.println("\n查询名字为“你的名字”的MovieEntity：\n"+movieQueried); 805 | 806 | // 更新(更新主要是三步：1.获取实体id；2.修改实体属性；3.更新实体） 807 | // 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。 808 | Long personId = person.getId(); 809 | person.setBorn(1997); 810 | personRepository.save(person); 811 | person = personRepository.findPersonEntityByName("上白石萌音"); 812 | System.out.println(personId == person.getId()?"\n更新“上白石萌音”出生日期为1997信息成功！：\n"+person:"更新信息失败！"); 813 | } 814 | ``` 815 | 816 | ## 4.参考与源码 817 | 818 | > 案例来自官方文档： 819 | > 820 | > ``` 821 | > https://docs.spring.io/spring-data/neo4j/docs/current/reference/html/#conversions 822 | > https://neo4j.com/docs/aura/auradb/connecting-applications/spring-boot/ 823 | > ``` 824 | > 825 | > 源码戳这里： 826 | > 827 | > https://github.com/WuYiheng-Og/neo4j_springboot 828 | -------------------------------------------------------------------------------- /mvnw: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | # ---------------------------------------------------------------------------- 3 | # Licensed to the Apache Software Foundation (ASF) under one 4 | # or more contributor license agreements. See the NOTICE file 5 | # distributed with this work for additional information 6 | # regarding copyright ownership. The ASF licenses this file 7 | # to you under the Apache License, Version 2.0 (the 8 | # "License"); you may not use this file except in compliance 9 | # with the License. You may obtain a copy of the License at 10 | # 11 | # https://www.apache.org/licenses/LICENSE-2.0 12 | # 13 | # Unless required by applicable law or agreed to in writing, 14 | # software distributed under the License is distributed on an 15 | # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 | # KIND, either express or implied. See the License for the 17 | # specific language governing permissions and limitations 18 | # under the License. 19 | # ---------------------------------------------------------------------------- 20 | 21 | # ---------------------------------------------------------------------------- 22 | # Maven Start Up Batch script 23 | # 24 | # Required ENV vars: 25 | # ------------------ 26 | # JAVA_HOME - location of a JDK home dir 27 | # 28 | # Optional ENV vars 29 | # ----------------- 30 | # M2_HOME - location of maven2's installed home dir 31 | # MAVEN_OPTS - parameters passed to the Java VM when running Maven 32 | # e.g. to debug Maven itself, use 33 | # set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 34 | # MAVEN_SKIP_RC - flag to disable loading of mavenrc files 35 | # ---------------------------------------------------------------------------- 36 | 37 | if [ -z "$MAVEN_SKIP_RC" ] ; then 38 | 39 | if [ -f /usr/local/etc/mavenrc ] ; then 40 | . /usr/local/etc/mavenrc 41 | fi 42 | 43 | if [ -f /etc/mavenrc ] ; then 44 | . /etc/mavenrc 45 | fi 46 | 47 | if [ -f "$HOME/.mavenrc" ] ; then 48 | . "$HOME/.mavenrc" 49 | fi 50 | 51 | fi 52 | 53 | # OS specific support. $var _must_ be set to either true or false. 54 | cygwin=false; 55 | darwin=false; 56 | mingw=false 57 | case "`uname`" in 58 | CYGWIN*) cygwin=true ;; 59 | MINGW*) mingw=true;; 60 | Darwin*) darwin=true 61 | # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home 62 | # See https://developer.apple.com/library/mac/qa/qa1170/_index.html 63 | if [ -z "$JAVA_HOME" ]; then 64 | if [ -x "/usr/libexec/java_home" ]; then 65 | export JAVA_HOME="`/usr/libexec/java_home`" 66 | else 67 | export JAVA_HOME="/Library/Java/Home" 68 | fi 69 | fi 70 | ;; 71 | esac 72 | 73 | if [ -z "$JAVA_HOME" ] ; then 74 | if [ -r /etc/gentoo-release ] ; then 75 | JAVA_HOME=`java-config --jre-home` 76 | fi 77 | fi 78 | 79 | if [ -z "$M2_HOME" ] ; then 80 | ## resolve links - $0 may be a link to maven's home 81 | PRG="$0" 82 | 83 | # need this for relative symlinks 84 | while [ -h "$PRG" ] ; do 85 | ls=`ls -ld "$PRG"` 86 | link=`expr "$ls" : '.*-> \(.*\)$'` 87 | if expr "$link" : '/.*' > /dev/null; then 88 | PRG="$link" 89 | else 90 | PRG="`dirname "$PRG"`/$link" 91 | fi 92 | done 93 | 94 | saveddir=`pwd` 95 | 96 | M2_HOME=`dirname "$PRG"`/.. 97 | 98 | # make it fully qualified 99 | M2_HOME=`cd "$M2_HOME" && pwd` 100 | 101 | cd "$saveddir" 102 | # echo Using m2 at $M2_HOME 103 | fi 104 | 105 | # For Cygwin, ensure paths are in UNIX format before anything is touched 106 | if $cygwin ; then 107 | [ -n "$M2_HOME" ] && 108 | M2_HOME=`cygpath --unix "$M2_HOME"` 109 | [ -n "$JAVA_HOME" ] && 110 | JAVA_HOME=`cygpath --unix "$JAVA_HOME"` 111 | [ -n "$CLASSPATH" ] && 112 | CLASSPATH=`cygpath --path --unix "$CLASSPATH"` 113 | fi 114 | 115 | # For Mingw, ensure paths are in UNIX format before anything is touched 116 | if $mingw ; then 117 | [ -n "$M2_HOME" ] && 118 | M2_HOME="`(cd "$M2_HOME"; pwd)`" 119 | [ -n "$JAVA_HOME" ] && 120 | JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`" 121 | fi 122 | 123 | if [ -z "$JAVA_HOME" ]; then 124 | javaExecutable="`which javac`" 125 | if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then 126 | # readlink(1) is not available as standard on Solaris 10. 127 | readLink=`which readlink` 128 | if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then 129 | if $darwin ; then 130 | javaHome="`dirname \"$javaExecutable\"`" 131 | javaExecutable="`cd \"$javaHome\" && pwd -P`/javac" 132 | else 133 | javaExecutable="`readlink -f \"$javaExecutable\"`" 134 | fi 135 | javaHome="`dirname \"$javaExecutable\"`" 136 | javaHome=`expr "$javaHome" : '\(.*\)/bin'` 137 | JAVA_HOME="$javaHome" 138 | export JAVA_HOME 139 | fi 140 | fi 141 | fi 142 | 143 | if [ -z "$JAVACMD" ] ; then 144 | if [ -n "$JAVA_HOME" ] ; then 145 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 146 | # IBM's JDK on AIX uses strange locations for the executables 147 | JAVACMD="$JAVA_HOME/jre/sh/java" 148 | else 149 | JAVACMD="$JAVA_HOME/bin/java" 150 | fi 151 | else 152 | JAVACMD="`\\unset -f command; \\command -v java`" 153 | fi 154 | fi 155 | 156 | if [ ! -x "$JAVACMD" ] ; then 157 | echo "Error: JAVA_HOME is not defined correctly." >&2 158 | echo " We cannot execute $JAVACMD" >&2 159 | exit 1 160 | fi 161 | 162 | if [ -z "$JAVA_HOME" ] ; then 163 | echo "Warning: JAVA_HOME environment variable is not set." 164 | fi 165 | 166 | CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher 167 | 168 | # traverses directory structure from process work directory to filesystem root 169 | # first directory with .mvn subdirectory is considered project base directory 170 | find_maven_basedir() { 171 | 172 | if [ -z "$1" ] 173 | then 174 | echo "Path not specified to find_maven_basedir" 175 | return 1 176 | fi 177 | 178 | basedir="$1" 179 | wdir="$1" 180 | while [ "$wdir" != '/' ] ; do 181 | if [ -d "$wdir"/.mvn ] ; then 182 | basedir=$wdir 183 | break 184 | fi 185 | # workaround for JBEAP-8937 (on Solaris 10/Sparc) 186 | if [ -d "${wdir}" ]; then 187 | wdir=`cd "$wdir/.."; pwd` 188 | fi 189 | # end of workaround 190 | done 191 | echo "${basedir}" 192 | } 193 | 194 | # concatenates all lines of a file 195 | concat_lines() { 196 | if [ -f "$1" ]; then 197 | echo "$(tr -s '\n' ' ' < "$1")" 198 | fi 199 | } 200 | 201 | BASE_DIR=`find_maven_basedir "$(pwd)"` 202 | if [ -z "$BASE_DIR" ]; then 203 | exit 1; 204 | fi 205 | 206 | ########################################################################################## 207 | # Extension to allow automatically downloading the maven-wrapper.jar from Maven-central 208 | # This allows using the maven wrapper in projects that prohibit checking in binary data. 209 | ########################################################################################## 210 | if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then 211 | if [ "$MVNW_VERBOSE" = true ]; then 212 | echo "Found .mvn/wrapper/maven-wrapper.jar" 213 | fi 214 | else 215 | if [ "$MVNW_VERBOSE" = true ]; then 216 | echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..." 217 | fi 218 | if [ -n "$MVNW_REPOURL" ]; then 219 | jarUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar" 220 | else 221 | jarUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar" 222 | fi 223 | while IFS="=" read key value; do 224 | case "$key" in (wrapperUrl) jarUrl="$value"; break ;; 225 | esac 226 | done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties" 227 | if [ "$MVNW_VERBOSE" = true ]; then 228 | echo "Downloading from: $jarUrl" 229 | fi 230 | wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" 231 | if $cygwin; then 232 | wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"` 233 | fi 234 | 235 | if command -v wget > /dev/null; then 236 | if [ "$MVNW_VERBOSE" = true ]; then 237 | echo "Found wget ... using wget" 238 | fi 239 | if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then 240 | wget "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath" 241 | else 242 | wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath" 243 | fi 244 | elif command -v curl > /dev/null; then 245 | if [ "$MVNW_VERBOSE" = true ]; then 246 | echo "Found curl ... using curl" 247 | fi 248 | if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then 249 | curl -o "$wrapperJarPath" "$jarUrl" -f 250 | else 251 | curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f 252 | fi 253 | 254 | else 255 | if [ "$MVNW_VERBOSE" = true ]; then 256 | echo "Falling back to using Java to download" 257 | fi 258 | javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java" 259 | # For Cygwin, switch paths to Windows format before running javac 260 | if $cygwin; then 261 | javaClass=`cygpath --path --windows "$javaClass"` 262 | fi 263 | if [ -e "$javaClass" ]; then 264 | if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then 265 | if [ "$MVNW_VERBOSE" = true ]; then 266 | echo " - Compiling MavenWrapperDownloader.java ..." 267 | fi 268 | # Compiling the Java class 269 | ("$JAVA_HOME/bin/javac" "$javaClass") 270 | fi 271 | if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then 272 | # Running the downloader 273 | if [ "$MVNW_VERBOSE" = true ]; then 274 | echo " - Running MavenWrapperDownloader.java ..." 275 | fi 276 | ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR") 277 | fi 278 | fi 279 | fi 280 | fi 281 | ########################################################################################## 282 | # End of extension 283 | ########################################################################################## 284 | 285 | export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} 286 | if [ "$MVNW_VERBOSE" = true ]; then 287 | echo $MAVEN_PROJECTBASEDIR 288 | fi 289 | MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS" 290 | 291 | # For Cygwin, switch paths to Windows format before running java 292 | if $cygwin; then 293 | [ -n "$M2_HOME" ] && 294 | M2_HOME=`cygpath --path --windows "$M2_HOME"` 295 | [ -n "$JAVA_HOME" ] && 296 | JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"` 297 | [ -n "$CLASSPATH" ] && 298 | CLASSPATH=`cygpath --path --windows "$CLASSPATH"` 299 | [ -n "$MAVEN_PROJECTBASEDIR" ] && 300 | MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"` 301 | fi 302 | 303 | # Provide a "standardized" way to retrieve the CLI args that will 304 | # work with both Windows and non-Windows executions. 305 | MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@" 306 | export MAVEN_CMD_LINE_ARGS 307 | 308 | WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain 309 | 310 | exec "$JAVACMD" \ 311 | $MAVEN_OPTS \ 312 | $MAVEN_DEBUG_OPTS \ 313 | -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ 314 | "-Dmaven.home=${M2_HOME}" \ 315 | "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ 316 | ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" 317 | -------------------------------------------------------------------------------- /mvnw.cmd: -------------------------------------------------------------------------------- 1 | @REM ---------------------------------------------------------------------------- 2 | @REM Licensed to the Apache Software Foundation (ASF) under one 3 | @REM or more contributor license agreements. See the NOTICE file 4 | @REM distributed with this work for additional information 5 | @REM regarding copyright ownership. The ASF licenses this file 6 | @REM to you under the Apache License, Version 2.0 (the 7 | @REM "License"); you may not use this file except in compliance 8 | @REM with the License. You may obtain a copy of the License at 9 | @REM 10 | @REM https://www.apache.org/licenses/LICENSE-2.0 11 | @REM 12 | @REM Unless required by applicable law or agreed to in writing, 13 | @REM software distributed under the License is distributed on an 14 | @REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 | @REM KIND, either express or implied. See the License for the 16 | @REM specific language governing permissions and limitations 17 | @REM under the License. 18 | @REM ---------------------------------------------------------------------------- 19 | 20 | @REM ---------------------------------------------------------------------------- 21 | @REM Maven Start Up Batch script 22 | @REM 23 | @REM Required ENV vars: 24 | @REM JAVA_HOME - location of a JDK home dir 25 | @REM 26 | @REM Optional ENV vars 27 | @REM M2_HOME - location of maven2's installed home dir 28 | @REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands 29 | @REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending 30 | @REM MAVEN_OPTS - parameters passed to the Java VM when running Maven 31 | @REM e.g. to debug Maven itself, use 32 | @REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 33 | @REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files 34 | @REM ---------------------------------------------------------------------------- 35 | 36 | @REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on' 37 | @echo off 38 | @REM set title of command window 39 | title %0 40 | @REM enable echoing by setting MAVEN_BATCH_ECHO to 'on' 41 | @if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO% 42 | 43 | @REM set %HOME% to equivalent of $HOME 44 | if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%") 45 | 46 | @REM Execute a user defined script before this one 47 | if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre 48 | @REM check for pre script, once with legacy .bat ending and once with .cmd ending 49 | if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %* 50 | if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %* 51 | :skipRcPre 52 | 53 | @setlocal 54 | 55 | set ERROR_CODE=0 56 | 57 | @REM To isolate internal variables from possible post scripts, we use another setlocal 58 | @setlocal 59 | 60 | @REM ==== START VALIDATION ==== 61 | if not "%JAVA_HOME%" == "" goto OkJHome 62 | 63 | echo. 64 | echo Error: JAVA_HOME not found in your environment. >&2 65 | echo Please set the JAVA_HOME variable in your environment to match the >&2 66 | echo location of your Java installation. >&2 67 | echo. 68 | goto error 69 | 70 | :OkJHome 71 | if exist "%JAVA_HOME%\bin\java.exe" goto init 72 | 73 | echo. 74 | echo Error: JAVA_HOME is set to an invalid directory. >&2 75 | echo JAVA_HOME = "%JAVA_HOME%" >&2 76 | echo Please set the JAVA_HOME variable in your environment to match the >&2 77 | echo location of your Java installation. >&2 78 | echo. 79 | goto error 80 | 81 | @REM ==== END VALIDATION ==== 82 | 83 | :init 84 | 85 | @REM Find the project base dir, i.e. the directory that contains the folder ".mvn". 86 | @REM Fallback to current working directory if not found. 87 | 88 | set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR% 89 | IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir 90 | 91 | set EXEC_DIR=%CD% 92 | set WDIR=%EXEC_DIR% 93 | :findBaseDir 94 | IF EXIST "%WDIR%"\.mvn goto baseDirFound 95 | cd .. 96 | IF "%WDIR%"=="%CD%" goto baseDirNotFound 97 | set WDIR=%CD% 98 | goto findBaseDir 99 | 100 | :baseDirFound 101 | set MAVEN_PROJECTBASEDIR=%WDIR% 102 | cd "%EXEC_DIR%" 103 | goto endDetectBaseDir 104 | 105 | :baseDirNotFound 106 | set MAVEN_PROJECTBASEDIR=%EXEC_DIR% 107 | cd "%EXEC_DIR%" 108 | 109 | :endDetectBaseDir 110 | 111 | IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig 112 | 113 | @setlocal EnableExtensions EnableDelayedExpansion 114 | for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a 115 | @endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS% 116 | 117 | :endReadAdditionalConfig 118 | 119 | SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" 120 | set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar" 121 | set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain 122 | 123 | set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar" 124 | 125 | FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO ( 126 | IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B 127 | ) 128 | 129 | @REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central 130 | @REM This allows using the maven wrapper in projects that prohibit checking in binary data. 131 | if exist %WRAPPER_JAR% ( 132 | if "%MVNW_VERBOSE%" == "true" ( 133 | echo Found %WRAPPER_JAR% 134 | ) 135 | ) else ( 136 | if not "%MVNW_REPOURL%" == "" ( 137 | SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar" 138 | ) 139 | if "%MVNW_VERBOSE%" == "true" ( 140 | echo Couldn't find %WRAPPER_JAR%, downloading it ... 141 | echo Downloading from: %DOWNLOAD_URL% 142 | ) 143 | 144 | powershell -Command "&{"^ 145 | "$webclient = new-object System.Net.WebClient;"^ 146 | "if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^ 147 | "$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^ 148 | "}"^ 149 | "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^ 150 | "}" 151 | if "%MVNW_VERBOSE%" == "true" ( 152 | echo Finished downloading %WRAPPER_JAR% 153 | ) 154 | ) 155 | @REM End of extension 156 | 157 | @REM Provide a "standardized" way to retrieve the CLI args that will 158 | @REM work with both Windows and non-Windows executions. 159 | set MAVEN_CMD_LINE_ARGS=%* 160 | 161 | %MAVEN_JAVA_EXE% ^ 162 | %JVM_CONFIG_MAVEN_PROPS% ^ 163 | %MAVEN_OPTS% ^ 164 | %MAVEN_DEBUG_OPTS% ^ 165 | -classpath %WRAPPER_JAR% ^ 166 | "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^ 167 | %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %* 168 | if ERRORLEVEL 1 goto error 169 | goto end 170 | 171 | :error 172 | set ERROR_CODE=1 173 | 174 | :end 175 | @endlocal & set ERROR_CODE=%ERROR_CODE% 176 | 177 | if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost 178 | @REM check for post script, once with legacy .bat ending and once with .cmd ending 179 | if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat" 180 | if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd" 181 | :skipRcPost 182 | 183 | @REM pause the script if MAVEN_BATCH_PAUSE is set to 'on' 184 | if "%MAVEN_BATCH_PAUSE%"=="on" pause 185 | 186 | if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE% 187 | 188 | cmd /C exit /B %ERROR_CODE% 189 | -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 4.0.0 5 | 6 | org.springframework.boot 7 | spring-boot-starter-parent 8 | 2.7.4 9 | 10 | 11 | com.example 12 | Neo4jDemo 13 | 0.0.1-SNAPSHOT 14 | Neo4jDemo 15 | Neo4jDemo 16 | 17 | 8 18 | 19 | 20 | 21 | 22 | org.neo4j.driver 23 | neo4j-java-driver 24 | 25 | 26 | 27 | org.springframework.boot 28 | spring-boot-starter-data-neo4j 29 | 30 | 31 | 32 | org.projectlombok 33 | lombok 34 | true 35 | 36 | 37 | org.springframework.boot 38 | spring-boot-starter-test 39 | test 40 | 41 | 42 | 43 | 44 | 45 | 46 | org.springframework.boot 47 | spring-boot-maven-plugin 48 | 49 | 50 | 51 | org.projectlombok 52 | lombok 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | -------------------------------------------------------------------------------- /src/main/java/com/example/neo4jdemo/Example.java: -------------------------------------------------------------------------------- 1 | //package com.example.neo4jdemo; 2 | // 3 | //import java.util.Collections; 4 | //import java.util.HashMap; 5 | //import java.util.List; 6 | //import java.util.Map; 7 | // 8 | //import org.neo4j.driver.Driver; 9 | //import org.neo4j.driver.Record; 10 | //import org.neo4j.driver.Result; 11 | //import org.neo4j.driver.Session; 12 | //import org.neo4j.driver.SessionConfig; 13 | //import org.neo4j.driver.TransactionWork; 14 | //import org.neo4j.driver.exceptions.Neo4jException; 15 | //import org.slf4j.Logger; 16 | //import org.slf4j.LoggerFactory; 17 | //import org.springframework.boot.CommandLineRunner; 18 | //import org.springframework.boot.SpringApplication; 19 | //import org.springframework.boot.autoconfigure.SpringBootApplication; 20 | //import org.springframework.context.ConfigurableApplicationContext; 21 | //import org.springframework.stereotype.Component; 22 | // 23 | // 24 | //@SpringBootApplication 25 | //public class Example { 26 | // 27 | // public static void main(String[] args) { 28 | // SpringApplication.run(Example.class, args); 29 | // } 30 | // 31 | //} 32 | // 33 | //@Component 34 | //class ExampleCommandLineRunner implements CommandLineRunner { 35 | // private static final Logger LOGGER = LoggerFactory.getLogger(ExampleCommandLineRunner.class.getName()); 36 | // 37 | // private final Driver driver; 38 | // 39 | // private final ConfigurableApplicationContext applicationContext; 40 | // 41 | // // Autowire the Driver bean by constructor injection 42 | // public ExampleCommandLineRunner(Driver driver, ConfigurableApplicationContext applicationContext) { 43 | // this.driver = driver; 44 | // this.applicationContext = applicationContext; 45 | // } 46 | // 47 | // @Override 48 | // public void run(String... args) throws Exception { 49 | // try (Session session = driver.session(SessionConfig.forDatabase("neo4j"))) { 50 | // // Using transaction functions allows the driver to handle retries and transient errors for you 51 | // 52 | // // The first examples indicates a write transaction that must go through the leader of a cluster 53 | // Record peopleCreated = session.writeTransaction(createRelationshipToPeople("Alice", "David")); 54 | // System.out.println("Create successful: " + peopleCreated.get("p1") + ", " + peopleCreated.get("p2")); 55 | // 56 | // // The second examples indicates a read transaction, that can be answered by a follower 57 | // session 58 | // .readTransaction(readPersonByName("Alice")) 59 | // .forEach(System.out::println); 60 | // } 61 | // 62 | // // Shutdown the application context to simulate application end. 63 | // // This closes all managed beans as well. The driver is one of those and its resources will be released. 64 | // applicationContext.close(); 65 | // } 66 | // 67 | // private static TransactionWork createRelationshipToPeople(String person1, String person2) { 68 | // 69 | // return tx -> { 70 | // // To learn more about the Cypher syntax, see https://neo4j.com/docs/cypher-manual/current/ 71 | // // The Reference Card is also a good resource for keywords https://neo4j.com/docs/cypher-refcard/current/ 72 | // 73 | // String createRelationshipToPeopleQuery = "MERGE (p1:Person { name: $person1_name }) \n" + 74 | // "MERGE (p2:Person { name: $person2_name })\n" + 75 | // "MERGE (p1)-[:KNOWS]->(p2)\n" + 76 | // "RETURN p1, p2"; 77 | // 78 | // Map params = new HashMap<>(); 79 | // params.put("person1_name", person1); 80 | // params.put("person2_name", person2); 81 | // 82 | // try { 83 | // Result result = tx.run(createRelationshipToPeopleQuery, params); 84 | // // You should not return the result itself outside of the scope of the transaction. 85 | // // The result will be closed when the transaction closes and it won't be usable afterwards. 86 | // // As we know that the query can only return one row, we can use the single method of the Result and 87 | // // return the record. 88 | // return result.single(); 89 | // 90 | // // You should capture any errors along with the query and data for traceability 91 | // } catch (Neo4jException ex) { 92 | // LOGGER.error(createRelationshipToPeopleQuery + " raised an exception", ex); 93 | // throw ex; 94 | // } 95 | // }; 96 | // } 97 | // 98 | // private static TransactionWork> readPersonByName(String name) { 99 | // 100 | // return tx -> { 101 | // String readPersonByNameQuery = "MATCH (p:Person)\n" + 102 | // " WHERE p.name = $person_name\n" + 103 | // " RETURN p.name AS name"; 104 | // 105 | // Map params = Collections.singletonMap("person_name", name); 106 | // 107 | // try { 108 | // Result result = tx.run(readPersonByNameQuery, params); 109 | // return result.list(row -> row.get("name").asString()); 110 | // } catch (Neo4jException ex) { 111 | // LOGGER.error(readPersonByNameQuery + " raised an exception", ex); 112 | // throw ex; 113 | // } 114 | // }; 115 | // } 116 | // 117 | //} -------------------------------------------------------------------------------- /src/main/java/com/example/neo4jdemo/Neo4jDemoApplication.java: -------------------------------------------------------------------------------- 1 | package com.example.neo4jdemo; 2 | 3 | import org.springframework.boot.SpringApplication; 4 | import org.springframework.boot.autoconfigure.SpringBootApplication; 5 | import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories; 6 | 7 | @SpringBootApplication 8 | @EnableNeo4jRepositories("com.example.neo4jdemo.repository") 9 | public class Neo4jDemoApplication { 10 | 11 | public static void main(String[] args) { 12 | SpringApplication.run(Neo4jDemoApplication.class, args); 13 | } 14 | 15 | } 16 | -------------------------------------------------------------------------------- /src/main/java/com/example/neo4jdemo/entity/MovieEntity.java: -------------------------------------------------------------------------------- 1 | package com.example.neo4jdemo.entity; 2 | 3 | import lombok.Data; 4 | import org.springframework.data.neo4j.core.schema.*; 5 | 6 | import java.util.ArrayList; 7 | import java.util.List; 8 | 9 | /** 10 | * Movie实体类，一个neo4j的节点 11 | * 注意到除了id外的属性均 12 | */ 13 | @Node(labels = "Movie") // 标签名，labels可以缺省 14 | @Data 15 | public class MovieEntity { 16 | 17 | @Id 18 | @GeneratedValue // Id自增 19 | private Long id; 20 | 21 | private final String title; 22 | 23 | @Property("tagline") // 映射到neo4j的属性名 24 | private final String description; 25 | 26 | public MovieEntity(String title, String description) { 27 | this.id = null; 28 | this.title = title; 29 | this.description = description; 30 | } 31 | 32 | // 用户指定特定的Id 33 | public MovieEntity withId(Long id) { 34 | if (this.id!= null && this.id.equals(id)) { 35 | return this; 36 | } else { 37 | MovieEntity newObject = new MovieEntity(this.title, this.description); 38 | newObject.id = id; 39 | return newObject; 40 | } 41 | } 42 | 43 | // 定义一个关系（参演）注意directiond代表箭头方向，INCOMING箭头指向自己，OUTGOING箭头指向TargetNode 44 | @Relationship(type = "ACTED_IN", direction = Relationship.Direction.INCOMING) 45 | private List actorsAndRoles = new ArrayList<>(); 46 | // 定义一个关系（导演） 47 | @Relationship(type = "DIRECTED", direction = Relationship.Direction.INCOMING) 48 | private List directors = new ArrayList<>(); 49 | // 注意这些关系最终的箭头指向（INCOMING）是当前实体，即TargetNode（PersonEntity）->当前定义Relationship的实体（MovieEntity） 50 | } 51 | -------------------------------------------------------------------------------- /src/main/java/com/example/neo4jdemo/entity/PersonEntity.java: -------------------------------------------------------------------------------- 1 | package com.example.neo4jdemo.entity; 2 | 3 | import lombok.Data; 4 | import org.springframework.data.neo4j.core.schema.GeneratedValue; 5 | import org.springframework.data.neo4j.core.schema.Id; 6 | import org.springframework.data.neo4j.core.schema.Node; 7 | 8 | 9 | @Node("Person") 10 | @Data 11 | public class PersonEntity { 12 | @Id 13 | @GeneratedValue 14 | private Long id; 15 | private String name; 16 | private Integer born; 17 | public PersonEntity(Integer born, String name) { 18 | this.name = name; 19 | this.born = born; 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /src/main/java/com/example/neo4jdemo/entity/Roles.java: -------------------------------------------------------------------------------- 1 | package com.example.neo4jdemo.entity; 2 | 3 | import org.springframework.data.neo4j.core.schema.RelationshipId; 4 | import org.springframework.data.neo4j.core.schema.RelationshipProperties; 5 | import org.springframework.data.neo4j.core.schema.TargetNode; 6 | 7 | import java.util.List; 8 | 9 | /** 10 | * 定义一个关系节点 11 | */ 12 | @RelationshipProperties 13 | public class Roles { 14 | 15 | @RelationshipId 16 | private Long id; 17 | 18 | private final List roles; 19 | 20 | @TargetNode 21 | private final PersonEntity person; 22 | 23 | // 参数1是目标关系实体节点 参数2是关系属性 24 | // Roles 参数1：Person实体，演员的出生年和姓名；参数2：演员名字列表（考虑到一个演员可能参演多个角色） 25 | public Roles(PersonEntity person, List roles) { 26 | this.person = person; 27 | this.roles = roles; 28 | } 29 | 30 | public List getRoles() { 31 | return roles; 32 | } 33 | } 34 | -------------------------------------------------------------------------------- /src/main/java/com/example/neo4jdemo/repository/MovieRepository.java: -------------------------------------------------------------------------------- 1 | package com.example.neo4jdemo.repository; 2 | 3 | import com.example.neo4jdemo.entity.MovieEntity; 4 | import org.springframework.data.neo4j.repository.Neo4jRepository; 5 | import org.springframework.data.neo4j.repository.query.Query; 6 | import org.springframework.stereotype.Repository; 7 | 8 | import java.util.List; 9 | 10 | @Repository 11 | public interface MovieRepository extends Neo4jRepository { 12 | 13 | // @Query("MATCH (n:Movie) WHERE id(n) = $0 RETURN n") 14 | List findMovieEntitiesById(Long id); 15 | MovieEntity findMovieEntityByTitle(String title); 16 | } 17 | -------------------------------------------------------------------------------- /src/main/java/com/example/neo4jdemo/repository/PersonRepository.java: -------------------------------------------------------------------------------- 1 | package com.example.neo4jdemo.repository; 2 | 3 | import com.example.neo4jdemo.entity.PersonEntity; 4 | import org.springframework.data.neo4j.repository.Neo4jRepository; 5 | import org.springframework.stereotype.Repository; 6 | 7 | @Repository 8 | public interface PersonRepository extends Neo4jRepository { 9 | PersonEntity findPersonEntityByName(String name); 10 | } 11 | -------------------------------------------------------------------------------- /src/main/java/com/example/neo4jdemo/utils/ExampleCommandLineRunner.java: -------------------------------------------------------------------------------- 1 | package com.example.neo4jdemo.utils; 2 | 3 | import lombok.extern.slf4j.Slf4j; 4 | import org.neo4j.driver.*; 5 | import org.springframework.boot.CommandLineRunner; 6 | import org.springframework.context.ConfigurableApplicationContext; 7 | import org.springframework.context.annotation.Bean; 8 | import org.springframework.stereotype.Component; 9 | 10 | @Component 11 | @Slf4j 12 | public class ExampleCommandLineRunner implements CommandLineRunner { 13 | 14 | private final Driver driver; 15 | private final ConfigurableApplicationContext applicationContext; 16 | public final Session session; 17 | 18 | @Bean 19 | Session session(){ 20 | return session; 21 | } 22 | 23 | // Autowire the Driver bean by constructor injection 24 | public ExampleCommandLineRunner(Driver driver, ConfigurableApplicationContext applicationContext) { 25 | this.driver = driver; 26 | this.applicationContext = applicationContext; 27 | this.session = driver.session(); 28 | 29 | } 30 | 31 | @Override 32 | public void run(String... args) throws Exception { 33 | } 34 | } 35 | -------------------------------------------------------------------------------- /src/main/resources/application.yml: -------------------------------------------------------------------------------- 1 | spring: 2 | neo4j: 3 | uri: bolt://:7687 4 | authentication: 5 | username: 6 | password: 7 | # 指定数据库 8 | data: 9 | neo4j: 10 | database: -------------------------------------------------------------------------------- /src/test/java/com/example/neo4jdemo/Neo4jDemoApplicationTests.java: -------------------------------------------------------------------------------- 1 | package com.example.neo4jdemo; 2 | 3 | import com.example.neo4jdemo.entity.MovieEntity; 4 | import com.example.neo4jdemo.entity.PersonEntity; 5 | import com.example.neo4jdemo.entity.Roles; 6 | import com.example.neo4jdemo.repository.MovieRepository; 7 | import com.example.neo4jdemo.repository.PersonRepository; 8 | import org.junit.jupiter.api.Test; 9 | //import org.neo4j.driver.Session; 10 | import org.springframework.beans.factory.annotation.Autowired; 11 | import org.springframework.boot.test.context.SpringBootTest; 12 | import org.springframework.data.neo4j.core.Neo4jTemplate; 13 | import org.springframework.data.neo4j.repository.query.QueryFragmentsAndParameters; 14 | 15 | import java.util.*; 16 | 17 | @SpringBootTest 18 | class Neo4jDemoApplicationTests { 19 | // @Autowired 20 | // Session session; 21 | 22 | // @Test 23 | // void contextLoads() { 24 | // Session session = exampleCommandLineRunner.session; 25 | // // Using transaction functions allows the driver to handle retries and transient errors for you 26 | // 27 | // // The first examples indicates a write transaction that must go through the leader of a cluster 28 | // Record peopleCreated = session.writeTransaction(exampleCommandLineRunner.createRelationshipToPeople("Alice", "David")); 29 | // System.out.println("Create successful: " + peopleCreated.get("p1") + ", " + peopleCreated.get("p2")); 30 | // 31 | // // The second examples indicates a read transaction, that can be answered by a follower 32 | // session 33 | // .readTransaction(exampleCommandLineRunner.readPersonByName("Alice")) 34 | // .forEach(System.out::println); 35 | // } 36 | 37 | 38 | 39 | /** 40 | * 没有Repository情况下使用Neo4jTemplate操作数据 41 | */ 42 | @Test 43 | void TestNoRepository(@Autowired Neo4jTemplate neo4jTemplate){ 44 | // 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 45 | neo4jTemplate.deleteAll(MovieEntity.class); 46 | neo4jTemplate.deleteAll(PersonEntity.class); 47 | // 创建节点实体 48 | MovieEntity movie = new MovieEntity("你的名字","影片讲述了男女高中生在梦中相遇，并寻找彼此的故事。"); 49 | 50 | // new Roles 参数1：Person实体，演员的出生年和姓名；参数2：演员名字列表（考虑到一个演员可能参演多个角色） 51 | // 参数1是目标关系实体节点 参数2是关系属性 52 | Roles roles1 = new Roles(new PersonEntity(1998,"上白石萌音"), Collections.singletonList("宫水三叶")); 53 | Roles roles2 = new Roles(new PersonEntity(1993,"神木隆之介"), Collections.singletonList("立花泷")); 54 | PersonEntity director = new PersonEntity(1973,"新海诚"); 55 | // 添加movie的演员实体，加入（参演）关系 56 | movie.getActorsAndRoles().add(roles1); 57 | movie.getActorsAndRoles().add(roles2); 58 | movie.getDirectors().add(director); 59 | 60 | // 存入图数据库持久化 61 | neo4jTemplate.save(movie); 62 | 63 | // 查询（不太推荐用Neo4jTemplate进行过滤查询，因为需要手动写cypherQuery,需要开发人员了解一下cypherQuery的写法） 64 | Optional person; 65 | // 1. 通过id查询 66 | person = neo4jTemplate.findById(12, PersonEntity.class); 67 | System.out.println("id为12号的Person节点：\n"+person); 68 | 69 | // 2. 通过属性查询节点，如name 需要手写cypherQuery语句 70 | Map map = new HashMap<>(); 71 | map.put("name","新海诚"); 72 | // 两种写法都对，看个人喜好 n是一个变量随意取，{}或者where填写query的filter过滤条件 73 | person = neo4jTemplate.findOne("MATCH (n:Person {name: $name}) RETURN n",map, PersonEntity.class); 74 | // person = neo4jTemplate.findOne("MATCH (n:Person) WHERE n.name = $name RETURN n",map, PersonEntity.class); 75 | System.out.println("\n查询名字为新海诚的Person节点:\n"+person); 76 | 77 | // 3. 通过属性关系查询节点 78 | map = new HashMap<>(); 79 | map.put("roles",Collections.singletonList("宫水三叶")); 80 | // 方法1.使用toExecutableQuery查询 81 | QueryFragmentsAndParameters parameters = new QueryFragmentsAndParameters( 82 | "MATCH (person:Person) -[ relation:ACTED_IN]-> (movie:Movie) \n" + 83 | "WHERE relation.roles = $roles\n" + 84 | "RETURN person",map); 85 | List roles = neo4jTemplate.toExecutableQuery(PersonEntity.class, parameters).getResults(); 86 | // 方法2.使用findOne查询 87 | // Optional roles = neo4jTemplate.findOne( 88 | // "MATCH (person:Person) -[ relation:ACTED_IN]-> (movie:Movie) \n" + 89 | // "WHERE relation.roles = $roles\n" + 90 | // "RETURN person",map,PersonEntity.class); 91 | System.out.println("\n查询角色为“宫水三叶”的演员：\n"+roles); 92 | 93 | Long userId = person.get().getId();// 记录当前查询的"新海诚"的节点id 94 | // 更新①---------更新“新海诚”的name为曾用名“新津诚”（这是他的曾用名） 95 | map.put("name","新海诚"); 96 | map.put("usedName","新津诚"); 97 | QueryFragmentsAndParameters queryFragmentsAndParameters = 98 | new QueryFragmentsAndParameters( 99 | "MATCH (n:Person{name: $name}) SET n.name = $usedName", 100 | map); 101 | neo4jTemplate.toExecutableQuery( 102 | PersonEntity.class, 103 | queryFragmentsAndParameters).getResults(); 104 | Optional person1 = neo4jTemplate.findById(userId, PersonEntity.class); 105 | System.out.println("\n更新“新海诚”的name为曾用名“新津诚”（这是他的曾用名）:\n"+person1); 106 | // 更新②---------更新“新津诚”的name为“新海诚” 107 | person.get().setName("新海诚"); 108 | neo4jTemplate.save(person.get()); 109 | Optional person2 = neo4jTemplate.findById(userId, PersonEntity.class); 110 | System.out.println("\n更新“新津诚”的name为“新海诚”:\n"+person2); 111 | 112 | } 113 | 114 | /** 115 | * 使用repository操作图数据 116 | */ 117 | @Test 118 | void testByRepository(@Autowired MovieRepository movieRepository, @Autowired PersonRepository personRepository){ 119 | // 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 120 | movieRepository.deleteAll(); 121 | personRepository.deleteAll(); 122 | 123 | // 创建节点 124 | MovieEntity movie = new MovieEntity("你的名字","影片讲述了男女高中生在梦中相遇，并寻找彼此的故事。"); 125 | Roles roles1 = new Roles(new PersonEntity(1998,"上白石萌音"), Collections.singletonList("宫水三叶")); 126 | Roles roles2 = new Roles(new PersonEntity(1993,"神木隆之介"), Collections.singletonList("立花泷")); 127 | PersonEntity director = new PersonEntity(1973,"新海诚"); 128 | // 添加关系 129 | movie.getActorsAndRoles().add(roles1); 130 | movie.getActorsAndRoles().add(roles2); 131 | movie.getDirectors().add(director); 132 | // 存入图数据库持久化 133 | movieRepository.save(movie); 134 | 135 | // 查询 136 | PersonEntity person = personRepository.findPersonEntityByName("上白石萌音"); 137 | System.out.println("\n查询名字为“上白石萌音”的PersonEntity：\n"+person); 138 | MovieEntity movieQueried = movieRepository.findMovieEntityByTitle("你的名字"); 139 | System.out.println("\n查询名字为“你的名字”的MovieEntity：\n"+movieQueried); 140 | 141 | // 更新(更新主要是三步：1.获取实体id；2.修改实体属性；3.更新实体） 142 | // 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。 143 | Long personId = person.getId(); 144 | person.setBorn(1997); 145 | personRepository.save(person); 146 | person = personRepository.findPersonEntityByName("上白石萌音"); 147 | System.out.println(personId == person.getId()?"\n更新“上白石萌音”出生日期为1997信息成功！：\n"+person:"更新信息失败！"); 148 | } 149 | 150 | } --------------------------------------------------------------------------------