Spring Boot 2.0.0.M4在Spring Data REST调用上抛出ConverterNotFoundException

Question

我试图将我的项目提升到最新的Spring Boot 2.0.0里程碑(编写本文时的M4)并且我一直在为一个丢失的转换器(ZonedDateTime到java.util.Date)获得一个例外,尽管它已经明确配置了 - 至少对我来说.这是代码和堆栈跟踪:

import org.springframework.core.convert.converter.Converter;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;

import java.time.ZonedDateTime;
import java.util.Date;

@Component
public class ZonedDateTimePersistenceConverter implements Converter<ZonedDateTime, Date> {

    @Nullable
    @Override
    public Date convert(ZonedDateTime source) {
        return Date.from(java.time.ZonedDateTime.now().toInstant());
    }

}

在调用相应的Spring Data REST端点时,我得到:

2017-09-17 21:07:53.634 ERROR 1894 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.time.ZonedDateTime] to type [java.util.Date]] with root cause

org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.time.ZonedDateTime] to type [java.util.Date]
    at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:321) ~[spring-core-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:194) ~[spring-core-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:174) ~[spring-core-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.data.rest.webmvc.HttpHeadersPreparer.lambda$getLastModifiedInMilliseconds$5(HttpHeadersPreparer.java:123) ~[spring-data-rest-webmvc-3.0.0.RC3.jar:na]
    at java.util.Optional.map(Optional.java:215) ~[na:1.8.0_131]
    at org.springframework.data.rest.webmvc.HttpHeadersPreparer.getLastModifiedInMilliseconds(HttpHeadersPreparer.java:123) ~[spring-data-rest-webmvc-3.0.0.RC3.jar:na]
    at org.springframework.data.rest.webmvc.HttpHeadersPreparer.prepareHeaders(HttpHeadersPreparer.java:83) ~[spring-data-rest-webmvc-3.0.0.RC3.jar:na]
    at org.springframework.data.rest.webmvc.ResourceStatus.getStatusAndHeaders(ResourceStatus.java:71) ~[spring-data-rest-webmvc-3.0.0.RC3.jar:na]
    at org.springframework.data.rest.webmvc.RepositoryEntityController.lambda$getItemResource$3(RepositoryEntityController.java:337) ~[spring-data-rest-webmvc-3.0.0.RC3.jar:na]
    at java.util.Optional.map(Optional.java:215) ~[na:1.8.0_131]
    at org.springframework.data.rest.webmvc.RepositoryEntityController.getItemResource(RepositoryEntityController.java:333) ~[spring-data-rest-webmvc-3.0.0.RC3.jar:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) ~[spring-web-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:869) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:775) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:981) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:915) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855) ~[spring-webmvc-5.0.0.RC4.jar:5.0.0.RC4]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.20.jar:8.5.20]
...

我已经做过一些研究,比如调试和检查GenericConversionService,DefaultConversionService,通过WebMvcConfigurerAdapter手动将它添加到转换器注册表......无济于事.

知道我应该进一步看看还是会发生什么？非常感谢提前!:)

编辑1:关于我尝试过的内容以及发生的地方的其他信息.手动添加转换器没有帮助,如下所示:

@Component
public class AdditionalConverterConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addFormatters(FormatterRegistry registry) {
        registry.addConverter(new ZonedDateTimePersistenceConverter());
    }

}

有趣的是,当我尝试访问通过Spring Data REST存储库(实体称为"Posting",btw)公开的实体之一的URI时,会发生错误,如下所示:

@RepositoryRestResource(collectionResourceRel = "postings", path = "postings")
public interface PostingRepository extends PagingAndSortingRepository<Posting, Long> {
}

/ api/posts的GET工作正常,按预期列出第一个集合页面.然而,GET/api/postss/1却没有.实体中唯一关键的ZonedDateTime属性来自其映射的超类:

@CreatedDate
protected ZonedDateTime createdAt;

@LastModifiedDate
protected ZonedDateTime modifiedAt;

在列表中它们看起来很好 - 在详细视图中......不是那么多;)