SDN4 枚举到字符串转换失败
SDN4 Enum to String conversion fails
我有一个实体class:
@Data
@JsonIdentityInfo(generator=JSOGGenerator.class)
@NodeEntity(label="Person")
public class PersonNode {
@GraphId private @NonNull Long id;
@Property(name="neo_ID") private @NonNull Long ID;
@Property(name="neo_name") private @NonNull String name;
@Property(name="neo_surname") private @NonNull String surname;
@Property(name="neo_spec") private @NonNull String specialization;
@Property(name="neo_gender") private @NonNull @Convert(graphPropertyType = String.class)
Gender sex;
@Property(name="neo_age") private @NonNull Byte age;
public PatientNode() {
}
而 Gender 类型：
public enum Gender {
MALE("M"),
FEMALE("F"),
UNKNOWN("");
private final String gender;
Gender(String sex){
if (sex.toUpperCase().equals("F") || sex.toUpperCase().equals("M") )
this.gender = sex.toUpperCase();
else
this.gender="";
}
String getGender(){
return this.gender;
}
public static Gender toGender(String str){
try {
return valueOf(str.toUpperCase(Locale.ENGLISH));
}
catch (Exception ex) {
return UNKNOWN;
}
}
public String toString(){
return this.gender;
}
}
我添加了：
@Bean
public ConversionService conversionService() {
return new MetaDataDrivenConversionService(getSessionFactory().metaData());
}
给我的 public class MyNeo4jConfiguration extends Neo4jConfiguration
现在的问题是，当我尝试使用 GrpahRepositry<person> 默认 findAll() 方法从 Neo4j 读取时，出现错误：
产生错误：
No converter found capable of converting from type java.lang.String to type .server.infrastructure.persistence.utils.Gender
1.有什么问题吗？
2。由于 Neo4j 不支持枚举类型，如何为 SDN4 提供这种简单的转换？
编辑：
问题依然存在。根据@Luanne 提示更改我的 Neo4jConfiguration 后，它看起来如下：
package server.infrastructure.repositories.neo4j.config;
import org.neo4j.ogm.session.Session;
import org.neo4j.ogm.session.SessionFactory;
import org.springframework.context.annotation.*;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.support.DefaultConversionService;
import org.springframework.core.convert.support.GenericConversionService;
import org.springframework.data.neo4j.config.Neo4jConfiguration;
import org.springframework.data.neo4j.conversion.MetaDataDrivenConversionService;
import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
import org.springframework.data.neo4j.server.Neo4jServer;
import org.springframework.data.neo4j.server.RemoteServer;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableNeo4jRepositories(basePackages = "server.infrastructure.repositories.neo4j")
@EnableTransactionManagement
@ComponentScan(basePackages = "server.services.neo4j")
public class MyNeo4jConfiguration extends Neo4jConfiguration {
public static final int NEO4J_PORT=7474;
public static final String USER_NAME="neo4j";
public static final String USER_PASS="aaa";
@Bean
public Neo4jServer neo4jServer() {
return new RemoteServer("http://localhost:"+NEO4J_PORT, USER_NAME, USER_PASS);
}
@Bean
public SessionFactory getSessionFactory() {
// with domain entity base package(s)
return new SessionFactory("server.infrastructure.persistence.neo4j");
}
// needed for session in view in web-applications
@Bean
@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
public Session getSession() throws Exception {
return super.getSession();
}
// For enum / date / biginteger etc types in entities conversion
@Bean
public ConversionService conversionService() {
ConversionService conversionService = new MetaDataDrivenConversionService(getSessionFactory().metaData());
DefaultConversionService.addDefaultConverters((GenericConversionService) conversionService);
return conversionService;
}
}
我正在使用以下 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>testing</groupId>
<artifactId>serverT</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>serverMR</name>
<url>http://maven.apache.org</url>
<properties>
<!-- Generic properties -->
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<!-- Spring -->
<spring.version>4.2.1.RELEASE</spring.version>
<spring-data.version>Gosling-RELEASE</spring-data.version>
<spring-data-neo4j.version>4.0.0.RELEASE</spring-data-neo4j.version>
<!-- Logging -->
<logback.version>1.1.3</logback.version>
<jcl.slf4j.version>1.7.12</jcl.slf4j.version>
</properties>
<build>
<plugins>
<!-- To run application with tomcat7:run -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<!-- For spring framework dependencies version compatibility -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-framework-bom</artifactId>
<version>${spring.version}</version>
<scope>import</scope>
<type>pom</type>
</dependency>
<!-- For spring-data dependencies version compatibility -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-releasetrain</artifactId>
<version>${spring-data.version}</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- hypermedia-driven REST web services on top of Spring Data infrastructure
- version from spring-data-releasetrain
-->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-rest-webmvc</artifactId>
</dependency>
<!-- Force newer version than spring-data-releasetrain -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>${spring-data-neo4j.version}</version>
</dependency>
<!-- For autogeneration of getter/setter-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.14.8</version>
</dependency>
<!-- JUnit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!--To run application with tomcat7:run force servlet 3.1 version to be used-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<!--To avoid circular JSON generation, the JSOGGenerator is used as id-generator in entities-->
<dependency>
<groupId>com.voodoodyne.jackson.jsog</groupId>
<artifactId>jackson-jsog</artifactId>
<version>1.0.1</version>
</dependency>
</dependencies>
</project>
然而，枚举仍然无法使用 运行 mvn tomcat7:run 进行转换并使用控制器进行引用：
@RestController
@RequestMapping("/per")
public class PersonController {
@Autowired
PersonService personService;
@RequestMapping(value = "/list",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_JSON_VALUE
)
public List<PersonNode> getPersons){
return personService.getList();
}
}
和服务：
@Service
@RequiredArgsConstructor(onConstructor = @__(@Autowired))
public class PersonService implements FinderService<PersonNode> {
private final @NonNull PersonNeo4JRepository personNeo4JRepository;
public List<PersonNode> getList(){
Iterable<PersonNode> iterablePer = personNeo4JRepository.findAll();
List<PersonNode> perList =
new ArrayList<>(IteratorUtil.asCollection(iterablePer));
return perList;
}
和 PersonRepository
@Repository
public interface PersonNeo4JRepository extends GraphRepository<PersonNode>
到http://localhost:8080/rest/per/list:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building serverMR 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> tomcat7-maven-plugin:2.2:run (default-cli) @ serverMR >>>
[INFO]
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ serverMR ---
[debug] execute contextualize
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 3 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.3:compile (default-compile) @ serverMR ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] <<< tomcat7-maven-plugin:2.2:run (default-cli) @ serverMR <<<
[INFO]
[INFO] --- tomcat7-maven-plugin:2.2:run (default-cli) @ serverMR ---
[INFO] Running war on http://localhost:8080/
[INFO] Creating Tomcat server configuration at /home/mc/Dropbox/Projekty/Robocze/serverMR/target/tomcat
[INFO] create webapp with contextPath:
gru 17, 2015 2:46:26 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
gru 17, 2015 2:46:26 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Tomcat
gru 17, 2015 2:46:26 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.47
gru 17, 2015 2:46:33 PM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath
gru 17, 2015 2:46:33 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
14:46:33.960 [localhost-startStop-1] INFO o.s.web.context.ContextLoader - Root WebApplicationContext: initialization started
14:46:34.035 [localhost-startStop-1] INFO o.s.w.c.s.XmlWebApplicationContext - Refreshing Root WebApplicationContext: startup date [Thu Dec 17 14:46:34 CET 2015]; root of context hierarchy
14:46:34.071 [localhost-startStop-1] INFO o.s.b.f.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring/ApplicationContext.xml]
14:46:34.150 [localhost-startStop-1] INFO o.s.b.f.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring/Neo4j-DataSources.xml]
14:46:34.521 [localhost-startStop-1] INFO o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'myNeo4jConfiguration' of type [class server.infrastructure.repositories.neo4j.config.MyNeo4jConfiguration$$EnhancerBySpringCGLIB$30c4f2] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
14:46:34.523 [localhost-startStop-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising PersistenceExceptionTranslationPostProcessor
14:46:34.818 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Starting Post-processing phase
14:46:34.818 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Building annotation class map
14:46:34.818 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Building interface class map for 6 classes
14:46:34.818 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Registering default type converters...
14:46:34.823 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Post-processing complete
14:46:34.823 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - 6 classes loaded in 16 milliseconds
14:46:35.094 [localhost-startStop-1] INFO o.s.d.n.mapping.Neo4jMappingContext - Neo4jMappingContext initialisation completed
14:46:35.211 [localhost-startStop-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising PersistenceExceptionTranslator
14:46:35.214 [localhost-startStop-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising PersistenceExceptionTranslationInterceptor
14:46:35.217 [localhost-startStop-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising Neo4jTransactionManager
14:46:35.255 [localhost-startStop-1] INFO o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1293 ms
14:46:35.285 [localhost-startStop-1] INFO o.s.web.servlet.DispatcherServlet - FrameworkServlet 'MR.rest.api': initialization started
gru 17, 2015 2:46:35 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'MR.rest.api'
14:46:35.290 [localhost-startStop-1] INFO o.s.w.c.s.XmlWebApplicationContext - Refreshing WebApplicationContext for namespace 'MR.rest.api-servlet': startup date [Thu Dec 17 14:46:35 CET 2015]; parent: Root WebApplicationContext
14:46:35.291 [localhost-startStop-1] INFO o.s.b.f.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/SpringMVC/SpringMVC-RESTContext.xml]
14:46:35.519 [localhost-startStop-1] INFO o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/per/list],methods=[GET],produces=[application/json]}" onto public java.util.List<server.infrastructure.persistence.neo4j.nodes.PersonNode> server.api.rest.controller.PersonController.getPersons()
14:46:35.701 [localhost-startStop-1] INFO o.s.w.s.m.m.a.RequestMappingHandlerAdapter - Looking for @ControllerAdvice: WebApplicationContext for namespace 'MR.rest.api-servlet': startup date [Thu Dec 17 14:46:35 CET 2015]; parent: Root WebApplicationContext
14:46:35.758 [localhost-startStop-1] INFO o.s.w.s.m.m.a.RequestMappingHandlerAdapter - Looking for @ControllerAdvice: WebApplicationContext for namespace 'MR.rest.api-servlet': startup date [Thu Dec 17 14:46:35 CET 2015]; parent: Root WebApplicationContext
14:46:35.857 [localhost-startStop-1] INFO o.s.web.servlet.DispatcherServlet - FrameworkServlet 'MR.rest.api': initialization completed in 572 ms
gru 17, 2015 2:46:35 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
14:46:42.928 [http-bio-8080-exec-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising Neo4jSession
14:46:43.143 [http-bio-8080-exec-1] INFO o.s.d.n.config.Neo4jConfiguration - Intercepted exception
gru 17, 2015 2:46:43 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [MR.rest.api] in context with path [] threw exception [Request processing failed; nested exception is org.neo4j.ogm.metadata.MappingException: Error mapping GraphModel to instance of server.infrastructure.persistence.neo4j.nodes.PersonNode] with root cause
java.lang.IllegalArgumentException: No enum constant server.infrastructure.persistence.utils.Gender.M
at java.lang.Enum.valueOf(Enum.java:238)
at org.springframework.core.convert.support.StringToEnumConverterFactory$StringToEnum.convert(StringToEnumConverterFactory.java:59)
at org.springframework.core.convert.support.StringToEnumConverterFactory$StringToEnum.convert(StringToEnumConverterFactory.java:45)
at org.springframework.core.convert.support.GenericConversionService$ConverterFactoryAdapter.convert(GenericConversionService.java:425)
at org.springframework.core.convert.support.ConversionUtils.invokeConverter(ConversionUtils.java:35)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:192)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:176)
at org.springframework.data.neo4j.conversion.MetaDataDrivenConversionService.convert(MetaDataDrivenConversionService.java:102)
at org.neo4j.ogm.typeconversion.ProxyAttributeConverter.toEntityAttribute(ProxyAttributeConverter.java:43)
at org.neo4j.ogm.entityaccess.FieldWriter.write(FieldWriter.java:64)
at org.neo4j.ogm.mapper.GraphEntityMapper.writeProperty(GraphEntityMapper.java:164)
at org.neo4j.ogm.mapper.GraphEntityMapper.setProperties(GraphEntityMapper.java:129)
at org.neo4j.ogm.mapper.GraphEntityMapper.mapNodes(GraphEntityMapper.java:110)
at org.neo4j.ogm.mapper.GraphEntityMapper.mapEntities(GraphEntityMapper.java:94)
at org.neo4j.ogm.mapper.GraphEntityMapper.map(GraphEntityMapper.java:69)
at org.neo4j.ogm.session.response.SessionResponseHandler.loadAll(SessionResponseHandler.java:181)
at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll(LoadByTypeDelegate.java:69)
at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll(LoadByTypeDelegate.java:99)
at org.neo4j.ogm.session.Neo4jSession.loadAll(Neo4jSession.java:119)
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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:133)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:121)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy36.loadAll(Unknown Source)
at org.springframework.data.neo4j.repository.GraphRepositoryImpl.findAll(GraphRepositoryImpl.java:123)
at org.springframework.data.neo4j.repository.GraphRepositoryImpl.findAll(GraphRepositoryImpl.java:118)
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:475)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:460)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:432)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
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.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy48.findAll(Unknown Source)
at server.services.neo4j.PersonService.getList(PersonService.java:30)
at server.api.rest.controller.PersonController.getPersons(PersonController.java:31)
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.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:111)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:806)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:729)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
由于要使用Spring提供的转换器，还需要向ConversionService注册。
例如，
@Bean
public ConversionService conversionService() {
ConversionService conversionService = new MetaDataDrivenConversionService(getSessionFactory().metaData());
DefaultConversionService.addDefaultConverters((GenericConversionService) conversionService);
return conversionService;
}
然后它会被捡起来使用。
根据提供的附加信息进行更新
堆栈跟踪显示正在调用转换器。但它试图找到一个值为 "M" 的枚举，但找不到。请注意，StringToEnumConverterFactory 在您的枚举上调用 valueOf（请参阅 class javadoc Converts from a String to a {@link java.lang.Enum} by calling {@link Enum#valueOf(Class, String)}.）
存储在图表中的值将是您的枚举名称 MALE，它将很好地转换回来。
那么，这是否意味着您的图表中有 neo_gender=M 的数据？如果是这样，也许您需要清理它，或者提供一个能够处理这两种情况的自定义转换器。
我有一个类似的问题，枚举 属性 没有被转换并且在加载对象时被设置为 null。
我的修复有两个方面，
- 添加接受的答案中提到的
ConversionService 配置，并且
将包含枚举的包添加到 SessionFactory 配置中。
@Override
@Bean
public SessionFactory getSessionFactory()
{
// With domain entity base package(s) which must include enums
// that are referenced by @NodeEntity classes.
return new SessionFactory("package.containing.node.entities",
"package.containing.enum.classes");
}
我有一个实体class:
@Data
@JsonIdentityInfo(generator=JSOGGenerator.class)
@NodeEntity(label="Person")
public class PersonNode {
@GraphId private @NonNull Long id;
@Property(name="neo_ID") private @NonNull Long ID;
@Property(name="neo_name") private @NonNull String name;
@Property(name="neo_surname") private @NonNull String surname;
@Property(name="neo_spec") private @NonNull String specialization;
@Property(name="neo_gender") private @NonNull @Convert(graphPropertyType = String.class)
Gender sex;
@Property(name="neo_age") private @NonNull Byte age;
public PatientNode() {
}
而 Gender 类型：
public enum Gender {
MALE("M"),
FEMALE("F"),
UNKNOWN("");
private final String gender;
Gender(String sex){
if (sex.toUpperCase().equals("F") || sex.toUpperCase().equals("M") )
this.gender = sex.toUpperCase();
else
this.gender="";
}
String getGender(){
return this.gender;
}
public static Gender toGender(String str){
try {
return valueOf(str.toUpperCase(Locale.ENGLISH));
}
catch (Exception ex) {
return UNKNOWN;
}
}
public String toString(){
return this.gender;
}
}
我添加了：
@Bean
public ConversionService conversionService() {
return new MetaDataDrivenConversionService(getSessionFactory().metaData());
}
给我的 public class MyNeo4jConfiguration extends Neo4jConfiguration
现在的问题是，当我尝试使用 GrpahRepositry<person> 默认 findAll() 方法从 Neo4j 读取时，出现错误：
产生错误：
No converter found capable of converting from type java.lang.String to type .server.infrastructure.persistence.utils.Gender
1.有什么问题吗？
2。由于 Neo4j 不支持枚举类型，如何为 SDN4 提供这种简单的转换？
编辑：
问题依然存在。根据@Luanne 提示更改我的 Neo4jConfiguration 后，它看起来如下：
package server.infrastructure.repositories.neo4j.config;
import org.neo4j.ogm.session.Session;
import org.neo4j.ogm.session.SessionFactory;
import org.springframework.context.annotation.*;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.support.DefaultConversionService;
import org.springframework.core.convert.support.GenericConversionService;
import org.springframework.data.neo4j.config.Neo4jConfiguration;
import org.springframework.data.neo4j.conversion.MetaDataDrivenConversionService;
import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
import org.springframework.data.neo4j.server.Neo4jServer;
import org.springframework.data.neo4j.server.RemoteServer;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableNeo4jRepositories(basePackages = "server.infrastructure.repositories.neo4j")
@EnableTransactionManagement
@ComponentScan(basePackages = "server.services.neo4j")
public class MyNeo4jConfiguration extends Neo4jConfiguration {
public static final int NEO4J_PORT=7474;
public static final String USER_NAME="neo4j";
public static final String USER_PASS="aaa";
@Bean
public Neo4jServer neo4jServer() {
return new RemoteServer("http://localhost:"+NEO4J_PORT, USER_NAME, USER_PASS);
}
@Bean
public SessionFactory getSessionFactory() {
// with domain entity base package(s)
return new SessionFactory("server.infrastructure.persistence.neo4j");
}
// needed for session in view in web-applications
@Bean
@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
public Session getSession() throws Exception {
return super.getSession();
}
// For enum / date / biginteger etc types in entities conversion
@Bean
public ConversionService conversionService() {
ConversionService conversionService = new MetaDataDrivenConversionService(getSessionFactory().metaData());
DefaultConversionService.addDefaultConverters((GenericConversionService) conversionService);
return conversionService;
}
}
我正在使用以下 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>testing</groupId>
<artifactId>serverT</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>serverMR</name>
<url>http://maven.apache.org</url>
<properties>
<!-- Generic properties -->
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<!-- Spring -->
<spring.version>4.2.1.RELEASE</spring.version>
<spring-data.version>Gosling-RELEASE</spring-data.version>
<spring-data-neo4j.version>4.0.0.RELEASE</spring-data-neo4j.version>
<!-- Logging -->
<logback.version>1.1.3</logback.version>
<jcl.slf4j.version>1.7.12</jcl.slf4j.version>
</properties>
<build>
<plugins>
<!-- To run application with tomcat7:run -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<!-- For spring framework dependencies version compatibility -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-framework-bom</artifactId>
<version>${spring.version}</version>
<scope>import</scope>
<type>pom</type>
</dependency>
<!-- For spring-data dependencies version compatibility -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-releasetrain</artifactId>
<version>${spring-data.version}</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- hypermedia-driven REST web services on top of Spring Data infrastructure
- version from spring-data-releasetrain
-->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-rest-webmvc</artifactId>
</dependency>
<!-- Force newer version than spring-data-releasetrain -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>${spring-data-neo4j.version}</version>
</dependency>
<!-- For autogeneration of getter/setter-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.14.8</version>
</dependency>
<!-- JUnit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!--To run application with tomcat7:run force servlet 3.1 version to be used-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<!--To avoid circular JSON generation, the JSOGGenerator is used as id-generator in entities-->
<dependency>
<groupId>com.voodoodyne.jackson.jsog</groupId>
<artifactId>jackson-jsog</artifactId>
<version>1.0.1</version>
</dependency>
</dependencies>
</project>
然而，枚举仍然无法使用 运行 mvn tomcat7:run 进行转换并使用控制器进行引用：
@RestController
@RequestMapping("/per")
public class PersonController {
@Autowired
PersonService personService;
@RequestMapping(value = "/list",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_JSON_VALUE
)
public List<PersonNode> getPersons){
return personService.getList();
}
}
和服务：
@Service
@RequiredArgsConstructor(onConstructor = @__(@Autowired))
public class PersonService implements FinderService<PersonNode> {
private final @NonNull PersonNeo4JRepository personNeo4JRepository;
public List<PersonNode> getList(){
Iterable<PersonNode> iterablePer = personNeo4JRepository.findAll();
List<PersonNode> perList =
new ArrayList<>(IteratorUtil.asCollection(iterablePer));
return perList;
}
和 PersonRepository
@Repository
public interface PersonNeo4JRepository extends GraphRepository<PersonNode>
到http://localhost:8080/rest/per/list:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building serverMR 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> tomcat7-maven-plugin:2.2:run (default-cli) @ serverMR >>>
[INFO]
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ serverMR ---
[debug] execute contextualize
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 3 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.3:compile (default-compile) @ serverMR ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] <<< tomcat7-maven-plugin:2.2:run (default-cli) @ serverMR <<<
[INFO]
[INFO] --- tomcat7-maven-plugin:2.2:run (default-cli) @ serverMR ---
[INFO] Running war on http://localhost:8080/
[INFO] Creating Tomcat server configuration at /home/mc/Dropbox/Projekty/Robocze/serverMR/target/tomcat
[INFO] create webapp with contextPath:
gru 17, 2015 2:46:26 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
gru 17, 2015 2:46:26 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Tomcat
gru 17, 2015 2:46:26 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.47
gru 17, 2015 2:46:33 PM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath
gru 17, 2015 2:46:33 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
14:46:33.960 [localhost-startStop-1] INFO o.s.web.context.ContextLoader - Root WebApplicationContext: initialization started
14:46:34.035 [localhost-startStop-1] INFO o.s.w.c.s.XmlWebApplicationContext - Refreshing Root WebApplicationContext: startup date [Thu Dec 17 14:46:34 CET 2015]; root of context hierarchy
14:46:34.071 [localhost-startStop-1] INFO o.s.b.f.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring/ApplicationContext.xml]
14:46:34.150 [localhost-startStop-1] INFO o.s.b.f.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring/Neo4j-DataSources.xml]
14:46:34.521 [localhost-startStop-1] INFO o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'myNeo4jConfiguration' of type [class server.infrastructure.repositories.neo4j.config.MyNeo4jConfiguration$$EnhancerBySpringCGLIB$30c4f2] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
14:46:34.523 [localhost-startStop-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising PersistenceExceptionTranslationPostProcessor
14:46:34.818 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Starting Post-processing phase
14:46:34.818 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Building annotation class map
14:46:34.818 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Building interface class map for 6 classes
14:46:34.818 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Registering default type converters...
14:46:34.823 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - Post-processing complete
14:46:34.823 [localhost-startStop-1] INFO o.n.o.m.info.ClassFileProcessor - 6 classes loaded in 16 milliseconds
14:46:35.094 [localhost-startStop-1] INFO o.s.d.n.mapping.Neo4jMappingContext - Neo4jMappingContext initialisation completed
14:46:35.211 [localhost-startStop-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising PersistenceExceptionTranslator
14:46:35.214 [localhost-startStop-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising PersistenceExceptionTranslationInterceptor
14:46:35.217 [localhost-startStop-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising Neo4jTransactionManager
14:46:35.255 [localhost-startStop-1] INFO o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1293 ms
14:46:35.285 [localhost-startStop-1] INFO o.s.web.servlet.DispatcherServlet - FrameworkServlet 'MR.rest.api': initialization started
gru 17, 2015 2:46:35 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'MR.rest.api'
14:46:35.290 [localhost-startStop-1] INFO o.s.w.c.s.XmlWebApplicationContext - Refreshing WebApplicationContext for namespace 'MR.rest.api-servlet': startup date [Thu Dec 17 14:46:35 CET 2015]; parent: Root WebApplicationContext
14:46:35.291 [localhost-startStop-1] INFO o.s.b.f.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/SpringMVC/SpringMVC-RESTContext.xml]
14:46:35.519 [localhost-startStop-1] INFO o.s.w.s.m.m.a.RequestMappingHandlerMapping - Mapped "{[/per/list],methods=[GET],produces=[application/json]}" onto public java.util.List<server.infrastructure.persistence.neo4j.nodes.PersonNode> server.api.rest.controller.PersonController.getPersons()
14:46:35.701 [localhost-startStop-1] INFO o.s.w.s.m.m.a.RequestMappingHandlerAdapter - Looking for @ControllerAdvice: WebApplicationContext for namespace 'MR.rest.api-servlet': startup date [Thu Dec 17 14:46:35 CET 2015]; parent: Root WebApplicationContext
14:46:35.758 [localhost-startStop-1] INFO o.s.w.s.m.m.a.RequestMappingHandlerAdapter - Looking for @ControllerAdvice: WebApplicationContext for namespace 'MR.rest.api-servlet': startup date [Thu Dec 17 14:46:35 CET 2015]; parent: Root WebApplicationContext
14:46:35.857 [localhost-startStop-1] INFO o.s.web.servlet.DispatcherServlet - FrameworkServlet 'MR.rest.api': initialization completed in 572 ms
gru 17, 2015 2:46:35 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
14:46:42.928 [http-bio-8080-exec-1] INFO o.s.d.n.config.Neo4jConfiguration - Initialising Neo4jSession
14:46:43.143 [http-bio-8080-exec-1] INFO o.s.d.n.config.Neo4jConfiguration - Intercepted exception
gru 17, 2015 2:46:43 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [MR.rest.api] in context with path [] threw exception [Request processing failed; nested exception is org.neo4j.ogm.metadata.MappingException: Error mapping GraphModel to instance of server.infrastructure.persistence.neo4j.nodes.PersonNode] with root cause
java.lang.IllegalArgumentException: No enum constant server.infrastructure.persistence.utils.Gender.M
at java.lang.Enum.valueOf(Enum.java:238)
at org.springframework.core.convert.support.StringToEnumConverterFactory$StringToEnum.convert(StringToEnumConverterFactory.java:59)
at org.springframework.core.convert.support.StringToEnumConverterFactory$StringToEnum.convert(StringToEnumConverterFactory.java:45)
at org.springframework.core.convert.support.GenericConversionService$ConverterFactoryAdapter.convert(GenericConversionService.java:425)
at org.springframework.core.convert.support.ConversionUtils.invokeConverter(ConversionUtils.java:35)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:192)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:176)
at org.springframework.data.neo4j.conversion.MetaDataDrivenConversionService.convert(MetaDataDrivenConversionService.java:102)
at org.neo4j.ogm.typeconversion.ProxyAttributeConverter.toEntityAttribute(ProxyAttributeConverter.java:43)
at org.neo4j.ogm.entityaccess.FieldWriter.write(FieldWriter.java:64)
at org.neo4j.ogm.mapper.GraphEntityMapper.writeProperty(GraphEntityMapper.java:164)
at org.neo4j.ogm.mapper.GraphEntityMapper.setProperties(GraphEntityMapper.java:129)
at org.neo4j.ogm.mapper.GraphEntityMapper.mapNodes(GraphEntityMapper.java:110)
at org.neo4j.ogm.mapper.GraphEntityMapper.mapEntities(GraphEntityMapper.java:94)
at org.neo4j.ogm.mapper.GraphEntityMapper.map(GraphEntityMapper.java:69)
at org.neo4j.ogm.session.response.SessionResponseHandler.loadAll(SessionResponseHandler.java:181)
at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll(LoadByTypeDelegate.java:69)
at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll(LoadByTypeDelegate.java:99)
at org.neo4j.ogm.session.Neo4jSession.loadAll(Neo4jSession.java:119)
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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:133)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:121)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy36.loadAll(Unknown Source)
at org.springframework.data.neo4j.repository.GraphRepositoryImpl.findAll(GraphRepositoryImpl.java:123)
at org.springframework.data.neo4j.repository.GraphRepositoryImpl.findAll(GraphRepositoryImpl.java:118)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:475)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:460)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:432)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
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.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy48.findAll(Unknown Source)
at server.services.neo4j.PersonService.getList(PersonService.java:30)
at server.api.rest.controller.PersonController.getPersons(PersonController.java:31)
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.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:111)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:806)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:729)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
由于要使用Spring提供的转换器，还需要向ConversionService注册。
例如，
@Bean
public ConversionService conversionService() {
ConversionService conversionService = new MetaDataDrivenConversionService(getSessionFactory().metaData());
DefaultConversionService.addDefaultConverters((GenericConversionService) conversionService);
return conversionService;
}
然后它会被捡起来使用。
根据提供的附加信息进行更新
堆栈跟踪显示正在调用转换器。但它试图找到一个值为 "M" 的枚举，但找不到。请注意，StringToEnumConverterFactory 在您的枚举上调用 valueOf（请参阅 class javadoc Converts from a String to a {@link java.lang.Enum} by calling {@link Enum#valueOf(Class, String)}.）
存储在图表中的值将是您的枚举名称 MALE，它将很好地转换回来。
那么，这是否意味着您的图表中有 neo_gender=M 的数据？如果是这样，也许您需要清理它，或者提供一个能够处理这两种情况的自定义转换器。
我有一个类似的问题，枚举 属性 没有被转换并且在加载对象时被设置为 null。
我的修复有两个方面，
- 添加接受的答案中提到的
ConversionService配置，并且 将包含枚举的包添加到
SessionFactory配置中。@Override @Bean public SessionFactory getSessionFactory() { // With domain entity base package(s) which must include enums // that are referenced by @NodeEntity classes. return new SessionFactory("package.containing.node.entities", "package.containing.enum.classes"); }