使用 spring-data-neo4j 时出现 MappingException
MappingException when using spring-data-neo4j
最近用spring-data-neo4j写了一个电影推荐小demo。
但我坚持使用奇怪的 MappingException。
异常堆栈跟踪如下。
java.lang.IllegalStateException: Failed to execute CommandLineRunner
at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:675)
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:690)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at com.liudonghua.apps.neo4j_data_importer.Application.main(Application.java:202)
Caused by: org.springframework.data.mapping.model.MappingException: Setting property user to com.liudonghua.apps.neo4j_data_importer.domain.Movie@66286c8 on com.liudonghua.apps.neo4j_data_importer.domain.Rating@618519cf
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.setProperty(SourceStateTransmitter.java:85)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyEntityStatePropertyValue(SourceStateTransmitter.java:91)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.access[=11=]0(SourceStateTransmitter.java:40)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.doWithAssociation(SourceStateTransmitter.java:61)
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociations(BasicPersistentEntity.java:337)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyPropertiesFrom(SourceStateTransmitter.java:57)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.loadEntity(Neo4jEntityConverterImpl.java:112)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.read(Neo4jEntityConverterImpl.java:104)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedConverter.read(Neo4jEntityPersister.java:170)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.createEntityFromState(Neo4jEntityPersister.java:192)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:250)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:231)
at org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.java:357)
at org.springframework.data.neo4j.fieldaccess.RelatedToViaCollectionFieldAccessorFactory$RelatedToViaCollectionFieldAccessor.persistEntities(RelatedToViaCollectionFieldAccessorFactory.java:99)
at org.springframework.data.neo4j.fieldaccess.RelatedToViaCollectionFieldAccessorFactory$RelatedToViaCollectionFieldAccessor.setValue(RelatedToViaCollectionFieldAccessorFactory.java:93)
at org.springframework.data.neo4j.fieldaccess.DefaultEntityState.setValue(DefaultEntityState.java:113)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.setEntityStateValue(SourceStateTransmitter.java:70)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.access0(SourceStateTransmitter.java:40)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.doWithAssociation(SourceStateTransmitter.java:113)
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociations(BasicPersistentEntity.java:337)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyPropertiesTo(SourceStateTransmitter.java:109)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.write(Neo4jEntityConverterImpl.java:167)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedConverter.write(Neo4jEntityPersister.java:179)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:243)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:231)
at org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.java:357)
at org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.java:351)
at org.springframework.data.neo4j.repository.AbstractGraphRepository.save(AbstractGraphRepository.java:91)
at org.springframework.data.neo4j.repository.AbstractGraphRepository.save(AbstractGraphRepository.java:98)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:416)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:401)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:373)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$DefaultMethodInvokingMethodInterceptor.invoke(RepositoryFactorySupport.java:486)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.transaction.interceptor.TransactionInterceptor.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy52.save(Unknown Source)
at com.liudonghua.apps.neo4j_data_importer.Application.run(Application.java:109)
at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:672)
... 5 common frames omitted
Caused by: org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type com.liudonghua.apps.neo4j_data_importer.domain.Movie to type com.liudonghua.apps.neo4j_data_importer.domain.User
at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:311)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:192)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:173)
at org.springframework.data.mapping.model.BeanWrapper.getPotentiallyConvertedValue(BeanWrapper.java:157)
at org.springframework.data.mapping.model.BeanWrapper.setProperty(BeanWrapper.java:75)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.setProperty(SourceStateTransmitter.java:83)
... 53 common frames omitted
下面是一些相关的代码。
@NodeEntity
public class Movie {
@GraphId
Long nodeId;
@Indexed
private long id;
@Indexed
private String title;
private Date releaseDate;
private String imdbUrl;
@RelatedTo(type="HAS_GENRE")
@Fetch
Set<Genre> genres;
@RelatedToVia(type="RATED" ,direction=Direction.INCOMING)
@Fetch
Set<Rating> ratings;
public Movie() {
}
public Movie(long id, String title, Date releaseDate, String imdbUrl,
Set<Genre> genres) {
this.id = id;
this.title = title;
this.releaseDate = releaseDate;
this.imdbUrl = imdbUrl;
this.genres = genres;
}
// getters and setters are omitted here.
}
@RelationshipEntity(type = "RATED")
public class Rating {
@GraphId
Long relationId;
@Indexed
private long id;
private int rate;
@StartNode
private User user;
@EndNode
private Movie movie;
public Rating() {
}
public Rating(User user, Movie movie, int rate) {
this.user = user;
this.movie = movie;
this.rate = rate;
}
// getters and setters are omitted here.
}
@NodeEntity
public class User {
@GraphId
Long nodeId;
@Indexed
private long id;
private int age;
private String gender;
private String occupation;
private String zipCode;
//
@RelatedTo(type="RATED")
@Fetch
private Set<Movie> movies;
@RelatedToVia(type="RATED")
@Fetch
private Set<Rating> ratings;
public User() {
}
public User(long id, int age, String gender, String occupation,
String zipCode) {
this.id = id;
this.age = age;
this.gender = gender;
this.occupation = occupation;
this.zipCode = zipCode;
}
public Rating rate(Movie movie, int rate) {
Rating rating = new Rating(this, movie, rate);
ratings.add(rating);
return rating;
}
// getters and setters are omitted here.
}
public interface UserRepository extends GraphRepository<User> {
}
Movie movie = movieRepository.save(new Movie(...));
User user = userRepository.save(new User(...));
...
user.rate(movie, 3);
userRepository.save(user); // This line throws exception
下面是我的pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.liudonghua.apps</groupId>
<artifactId>neo4j-data-importer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>neo4j-data-importer</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<jdk.version>1.8</jdk.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.2.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>http://repo.spring.io/libs-release</url>
</repository>
<repository>
<id>neo4j</id>
<name>Neo4j</name>
<url>http://m2.neo4j.org/</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>http://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>
最后，我通过覆盖正确的 equals、hashCode 方法并提供完整的 getter 和 setter.
解决了这个问题
最近用spring-data-neo4j写了一个电影推荐小demo。 但我坚持使用奇怪的 MappingException。 异常堆栈跟踪如下。
java.lang.IllegalStateException: Failed to execute CommandLineRunner
at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:675)
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:690)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at com.liudonghua.apps.neo4j_data_importer.Application.main(Application.java:202)
Caused by: org.springframework.data.mapping.model.MappingException: Setting property user to com.liudonghua.apps.neo4j_data_importer.domain.Movie@66286c8 on com.liudonghua.apps.neo4j_data_importer.domain.Rating@618519cf
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.setProperty(SourceStateTransmitter.java:85)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyEntityStatePropertyValue(SourceStateTransmitter.java:91)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.access[=11=]0(SourceStateTransmitter.java:40)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.doWithAssociation(SourceStateTransmitter.java:61)
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociations(BasicPersistentEntity.java:337)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyPropertiesFrom(SourceStateTransmitter.java:57)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.loadEntity(Neo4jEntityConverterImpl.java:112)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.read(Neo4jEntityConverterImpl.java:104)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedConverter.read(Neo4jEntityPersister.java:170)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.createEntityFromState(Neo4jEntityPersister.java:192)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:250)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:231)
at org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.java:357)
at org.springframework.data.neo4j.fieldaccess.RelatedToViaCollectionFieldAccessorFactory$RelatedToViaCollectionFieldAccessor.persistEntities(RelatedToViaCollectionFieldAccessorFactory.java:99)
at org.springframework.data.neo4j.fieldaccess.RelatedToViaCollectionFieldAccessorFactory$RelatedToViaCollectionFieldAccessor.setValue(RelatedToViaCollectionFieldAccessorFactory.java:93)
at org.springframework.data.neo4j.fieldaccess.DefaultEntityState.setValue(DefaultEntityState.java:113)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.setEntityStateValue(SourceStateTransmitter.java:70)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.access0(SourceStateTransmitter.java:40)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.doWithAssociation(SourceStateTransmitter.java:113)
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociations(BasicPersistentEntity.java:337)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyPropertiesTo(SourceStateTransmitter.java:109)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.write(Neo4jEntityConverterImpl.java:167)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedConverter.write(Neo4jEntityPersister.java:179)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:243)
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.persist(Neo4jEntityPersister.java:231)
at org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.java:357)
at org.springframework.data.neo4j.support.Neo4jTemplate.save(Neo4jTemplate.java:351)
at org.springframework.data.neo4j.repository.AbstractGraphRepository.save(AbstractGraphRepository.java:91)
at org.springframework.data.neo4j.repository.AbstractGraphRepository.save(AbstractGraphRepository.java:98)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:416)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:401)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:373)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$DefaultMethodInvokingMethodInterceptor.invoke(RepositoryFactorySupport.java:486)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.transaction.interceptor.TransactionInterceptor.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy52.save(Unknown Source)
at com.liudonghua.apps.neo4j_data_importer.Application.run(Application.java:109)
at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:672)
... 5 common frames omitted
Caused by: org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type com.liudonghua.apps.neo4j_data_importer.domain.Movie to type com.liudonghua.apps.neo4j_data_importer.domain.User
at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:311)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:192)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:173)
at org.springframework.data.mapping.model.BeanWrapper.getPotentiallyConvertedValue(BeanWrapper.java:157)
at org.springframework.data.mapping.model.BeanWrapper.setProperty(BeanWrapper.java:75)
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.setProperty(SourceStateTransmitter.java:83)
... 53 common frames omitted
下面是一些相关的代码。
@NodeEntity
public class Movie {
@GraphId
Long nodeId;
@Indexed
private long id;
@Indexed
private String title;
private Date releaseDate;
private String imdbUrl;
@RelatedTo(type="HAS_GENRE")
@Fetch
Set<Genre> genres;
@RelatedToVia(type="RATED" ,direction=Direction.INCOMING)
@Fetch
Set<Rating> ratings;
public Movie() {
}
public Movie(long id, String title, Date releaseDate, String imdbUrl,
Set<Genre> genres) {
this.id = id;
this.title = title;
this.releaseDate = releaseDate;
this.imdbUrl = imdbUrl;
this.genres = genres;
}
// getters and setters are omitted here.
}
@RelationshipEntity(type = "RATED")
public class Rating {
@GraphId
Long relationId;
@Indexed
private long id;
private int rate;
@StartNode
private User user;
@EndNode
private Movie movie;
public Rating() {
}
public Rating(User user, Movie movie, int rate) {
this.user = user;
this.movie = movie;
this.rate = rate;
}
// getters and setters are omitted here.
}
@NodeEntity
public class User {
@GraphId
Long nodeId;
@Indexed
private long id;
private int age;
private String gender;
private String occupation;
private String zipCode;
//
@RelatedTo(type="RATED")
@Fetch
private Set<Movie> movies;
@RelatedToVia(type="RATED")
@Fetch
private Set<Rating> ratings;
public User() {
}
public User(long id, int age, String gender, String occupation,
String zipCode) {
this.id = id;
this.age = age;
this.gender = gender;
this.occupation = occupation;
this.zipCode = zipCode;
}
public Rating rate(Movie movie, int rate) {
Rating rating = new Rating(this, movie, rate);
ratings.add(rating);
return rating;
}
// getters and setters are omitted here.
}
public interface UserRepository extends GraphRepository<User> {
}
Movie movie = movieRepository.save(new Movie(...));
User user = userRepository.save(new User(...));
...
user.rate(movie, 3);
userRepository.save(user); // This line throws exception
下面是我的pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.liudonghua.apps</groupId>
<artifactId>neo4j-data-importer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>neo4j-data-importer</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<jdk.version>1.8</jdk.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.2.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>http://repo.spring.io/libs-release</url>
</repository>
<repository>
<id>neo4j</id>
<name>Neo4j</name>
<url>http://m2.neo4j.org/</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<name>Spring Releases</name>
<url>http://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>
最后，我通过覆盖正确的 equals、hashCode 方法并提供完整的 getter 和 setter.
解决了这个问题