org.springframework.data.mapping.model.MappingException：保存neo4j节点的未知持久化实体

Question

我尝试使用spring-boot和spring-data-neo4j来玩。可悲的是，我得到下面的异常，如果我试图保存节点：

org.springframework.data.mapping.model.MappingException: Unknown persistent entity de.hilbert.Stock 

我的代码如下所示：

我的pom.xml： ...

<parent> 
    <groupId>org.springframework.boot</groupId> 
    <artifactId>spring-boot-starter-parent</artifactId> 
    <version>1.1.8.RELEASE</version> 
    <relativePath/> <!-- lookup parent from repository --> 
</parent> 

<dependencies> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-freemarker</artifactId> 
     <version>1.1.8.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-test</artifactId> 
     <version>1.1.8.RELEASE</version> 
     <scope>test</scope> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-web</artifactId> 
     <version>1.1.8.RELEASE</version> 
     <exclusions> 
      <exclusion> 
       <groupId>org.springframework.boot</groupId> 
       <artifactId>spring-boot-starter-tomcat</artifactId> 
      </exclusion> 
    </exclusions> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-jetty</artifactId> 
     <version>1.1.8.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-actuator</artifactId> 
     <version>1.1.8.RELEASE</version> 
    </dependency> 

    <dependency> 
     <groupId>org.springframework.data</groupId> 
     <artifactId>spring-data-neo4j</artifactId> 
     <version>3.2.0.RELEASE</version> 
    </dependency> 

    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-tx</artifactId> 
     <version>4.1.1.RELEASE</version> 
    </dependency> 

    <dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-validator</artifactId> 
     <version>5.1.3.Final</version> 
    </dependency> 
</dependencies> 

<properties> 
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    <start-class>de.hilbert.Application</start-class> 
    <java.version>1.8</java.version> 
</properties> 

... 

我的配置：

@Configuration 
@ComponentScan(basePackages = {"de.hilbert"}) 
@EnableAutoConfiguration 
@EnableNeo4jRepositories(basePackages = {"de.hilbert"}) 
public class Application extends Neo4jConfiguration { 

    public Application() { 
     setBasePackage("de.hilbert"); 
    } 

    public static void main(String[] args) { 
     SpringApplication.run(Application.class, args); 
    } 

    @Bean(destroyMethod = "shutdown") 
    public GraphDatabaseService graphDatabaseService() { 
     return new GraphDatabaseFactory().newEmbeddedDatabase("target/neo4j.db"); 
    } 


    public Neo4jMappingContext neo4jMappingContext() { 
     return new Neo4jMappingContext(); 
    } 
} 

我的存储库：

@Repository 
public interface StockRepository extends GraphRepository<Stock>{} 

我的实体：

@NodeEntity 
public class Stock { 

    @GraphId 
    private Long id; 

    @Indexed(indexType = IndexType.FULLTEXT, indexName = "symbolIdx", unique = true) 
    private String symbol; 

    private String price; 

    public Long getId() { 
     return id; 
    } 

    public void setId(Long id) { 
     this.id = id; 
    } 

    public String getSymbol() { 
     return symbol; 
    } 

    public void setSymbol(String symbol) { 
     this.symbol = symbol; 
    } 

    public String getPrice() { 
     return price; 
    } 

    public void setPrice(String price) { 
     this.price = price; 
    } 
} 

我 “buissness” -code：

@RestController 
public class HelloController { 

    @Autowired 
    StockRepository stockRepository; 

    @Autowired 
    GraphDatabase graphDatabase; 

    @RequestMapping("/") 
    public String index() throws IOException { 

     Transaction tx = graphDatabase.beginTx(); 
     try { 
      Stock stock = new Stock(); 
      stock.setSymbol("SYMBOL"); 
      stock.setPrice("1"); 
      stockRepository.save(stock); 
      tx.success(); 
     } finally { 
      tx.close(); 
     } 

     return "Greetings from Spring Boot!"; 
    } 
} 

异常被抛出在 “stockRepository.save（股票）;”。

我已经尝试了一些解决方案，我发现：

https://github.com/spring-projects/spring-data-neo4j/issues/161 Unknown persistent entity Error" after upgrade to 3.0.1.Release

但没有任何帮助。有其他人有想法或看到我盲目的地步吗？

Answer 1

如果您的实体拥有正确的包装（未显示），它看起来不错。

你可以尝试为实体，控制器和存储库使用3个不同的包？

注：

• 你Stock实体没有一个空的构造。
• 你不需要Neo4jMappingContext(Impl)豆