はエラーで起動に失敗する春のプロジェクトを起こし

Question

public class Product { 

    @Id 
    private String id; 

    private String name; 

    private int brandId; 

    private List<Tag> tags; 
    List<Size> sizes; 

    Multimap<String, String> options; 


.... 

私はこのクラスを削除したら、これは、問題のクラスで最高罰金が、私は次の例外を取得クラスでアプリケーションの起動：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'repositoryEntityController' defined in URL [jar:file:/home/blackwellsa/.m2/repository/org/springframework/data/spring-data-rest-webmvc/2.5.2.RELEASE/spring-data-rest-webmvc-2.5.2.RELEASE.jar!/org/springframework/data/rest/webmvc/RepositoryEntityController.class]: Unsatisfied dependency expressed through constructor parameter 4: Error creating bean with name 'defaultConversionService' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]: Factory method 'defaultConversionService' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultConversionService' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]: Factory method 'defaultConversionService' threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:776) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at com.technologies.fortafy.Application.main(Application.java:14) [classes/:na] 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101] 
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101] 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na] 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'defaultConversionService' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]: Factory method 'defaultConversionService' threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:207) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1214) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1054) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1019) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    ... 24 common frames omitted 
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.DefaultFormattingConversionService]: Factory method 'defaultConversionService' threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    ... 38 common frames omitted 
Caused by: java.lang.NullPointerException: null 
    at org.springframework.data.rest.core.UriToEntityConverter.<init>(UriToEntityConverter.java:71) ~[spring-data-rest-core-2.5.2.RELEASE.jar:na] 
    at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.uriToEntityConverter(RepositoryRestMvcConfiguration.java:630) ~[spring-data-rest-webmvc-2.5.2.RELEASE.jar:na] 
    at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.defaultConversionService(RepositoryRestMvcConfiguration.java:221) ~[spring-data-rest-webmvc-2.5.2.RELEASE.jar:na] 
    at org.springframework.boot.autoconfigure.data.rest.SpringBootRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0e2dba3.CGLIB$defaultConversionService$1(<generated>) ~[spring-boot-autoconfigure-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at org.springframework.boot.autoconfigure.data.rest.SpringBootRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0e2dba3$$FastClassBySpringCGLIB$$14663f88.invoke(<generated>) ~[spring-boot-autoconfigure-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    at org.springframework.boot.autoconfigure.data.rest.SpringBootRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$c0e2dba3.defaultConversionService(<generated>) ~[spring-boot-autoconfigure-1.4.0.RELEASE.jar:1.4.0.RELEASE] 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101] 
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101] 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE] 
    ... 39 common frames omitted 

に

私は、バングを使用してmongoデータベースを休憩中のエンドポイントとして公開していて、グアバのマルチマップで何をすべきかを見つけるのが難しいという事実とは関係があります。

これは、問題のクラスに春に問題があるはずのものは何もないことを考慮すると、賢明なようです。さらに、春がこのクラスのヘルソンライブラリを使わずにjsonを作成することはできないようです。

私の質問はこれが問題だと思われますが、誰かがこのクラスを扱う際にスプリング/基礎となるjsonマッパーに助けを与える方法について助言を得ているようです。

編集：私は今、以下を含むように自分のアプリケーションを変更しました：

@SpringBootApplication 
public class Application extends SpringBootServletInitializer { 


    public static void main(String[] args) { 


     ApplicationContext ctx = SpringApplication.run(Application.class, args); 
    } 

    @Override 
    protected final SpringApplicationBuilder configure(final SpringApplicationBuilder application) { 
     return application.sources(Application.class); 
    } 

    @Bean 
    public Module guavaModule() { 
     return new GuavaModule(); 
    } 

} 

これはこれは本当にために、適切なモジュールを見つけていない春に問題がある場合、今、私は疑問に思って、エラーメッセージが変更されていませんシリアライゼーション。

Answer 1

MultiMapにカスタムorg.springframework.core.convert.ConversionServiceを登録して、直接サポートされている他の構造に変換することができます。

回避策として、それぞれのフィールドにorg.springframework.data.annotation.Transientというマークを付けると、永続性のためにピックアップされないようにすることもできます（これは永続化されないためです）。単にjavaキーワードでマークするだけでは十分ではないようです。

最後に、フィールドを通常のマップとして保存し、getter/setterのMultimapに変換することができます。