提前为这样一个愚蠢的问题道歉，但我试图从网站RESTcountries.eu创建使用Rest API来生成以下数据：
[{"name":"Estonia","topLevelDomain":[".ee"],"alpha2Code":"EE","alpha3Code":"EST","callingCodes":["372"],"capital":"Tallinn","altSpellings":["EE","Eesti","Republic of Estonia","Eesti Vabariik"],"region":"Europe","subregion":"Northern Europe","population":1315944,"latlng":[59.0,26.0],"demonym":"Estonian","area":45227.0,"gini":36.0,"timezones":["UTC+02:00"],"borders":["LVA","RUS"],"nativeName":"Eesti","numericCode":"233","currencies":[{"code":"EUR","name":"Euro","symbol":"€"}],"languages":[{"iso639_1":"et","iso639_2":"est","name":"Estonian","nativeName":"eesti"}],"translations":{"de":"Estland","es":"Estonia","fr":"Estonie","ja":"エストニア","it":"Estonia","br":"Estônia","pt":"Estónia"},"flag":"https://restcountries.eu/data/est.svg","regionalBlocs":[{"acronym":"EU","name":"European Union","otherAcronyms":[],"otherNames":[]}]}]
每次尝试运行程序时，我似乎都会收到错误消息。提前感谢您的帮助。
我有课程：
@JsonIgnoreProperties(ignoreUnknown = true)
public class BaseCountries {
private String name;
private List<String> topLevelDomain;
private String alpha2Code;
private String alpha3Code;
private List<String> callingCodes;
private String capital;
private List<String> altSpellings;
private String relevance;
private String region;
private String subregion;
private Integer population;
private List<Double> latlng;
private String demonym;
private Double area;
private Double gini;
private List<String> timezones;
private List<String> borders;
private String nativeName;
private String numericCode;
//Getters and Setters
}
}
这是我的主要：
@SpringBootApplication
@ComponentScan("com.ronone.service")
public class WorldStatsApplication {
private static final Logger log = LoggerFactory.getLogger(WorldStatsApplication.class);
public static void main(String[] args) {
String uri = "https://restcountries.eu/rest/v2/capital/{capital}";
SpringApplication.run(WorldStatsApplication.class, args);
RestTemplate restTemplate = new RestTemplate();
BaseCountries country = restTemplate.getForObject(uri, BaseCountries.class, "London");
System.out.println("Country Name: " + country.getCapital());
}
}
打印跟踪：
2017-06-17 22:21:58.336 INFO 1062 --- [ restartedMain] c.r.WorldStats.WorldStatsApplication : Starting WorldStatsApplication on Ronalds-MacBook-Pro.local with PID 1062 (started by ronaldpitt in /Users/ronaldpitt/Desktop/Java Apps/WorldStats)
2017-06-17 22:21:58.338 INFO 1062 --- [ restartedMain] c.r.WorldStats.WorldStatsApplication : No active profile set, falling back to default profiles: default
2017-06-17 22:21:58.413 INFO 1062 --- [ restartedMain] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4984bfe5: startup date [Sat Jun 17 22:21:58 EDT 2017]; root of context hierarchy
2017-06-17 22:21:59.432 INFO 1062 --- [ restartedMain] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'httpRequestHandlerAdapter' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration; factoryMethodName=httpRequestHandlerAdapter; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration; factoryMethodName=httpRequestHandlerAdapter; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/data/rest/webmvc/config/RepositoryRestMvcConfiguration.class]]
2017-06-17 22:22:00.833 INFO 1062 --- [ restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-06-17 22:22:00.855 INFO 1062 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-06-17 22:22:00.856 INFO 1062 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.15
2017-06-17 22:22:00.982 INFO 1062 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-06-17 22:22:00.983 INFO 1062 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2576 ms
2017-06-17 22:22:01.207 INFO 1062 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-06-17 22:22:01.213 INFO 1062 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-06-17 22:22:01.214 INFO 1062 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-06-17 22:22:01.214 INFO 1062 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-06-17 22:22:01.214 INFO 1062 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-06-17 22:22:02.125 INFO 1062 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4984bfe5: startup date [Sat Jun 17 22:21:58 EDT 2017]; root of context hierarchy
2017-06-17 22:22:02.243 INFO 1062 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2017-06-17 22:22:02.245 INFO 1062 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-06-17 22:22:02.306 INFO 1062 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-17 22:22:02.306 INFO 1062 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-17 22:22:02.329 INFO 1062 --- [ restartedMain] .m.m.a.ExceptionHandlerExceptionResolver : Detected @ExceptionHandler methods in repositoryRestExceptionHandler
2017-06-17 22:22:02.436 INFO 1062 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-06-17 22:22:02.587 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@4984bfe5: startup date [Sat Jun 17 22:21:58 EDT 2017]; root of context hierarchy
2017-06-17 22:22:02.603 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/ || ],methods=[OPTIONS],produces=[application/hal+json || application/json]}" onto public org.springframework.http.HttpEntity<?> org.springframework.data.rest.webmvc.RepositoryController.optionsForRepositories()
2017-06-17 22:22:02.604 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/ || ],methods=[GET],produces=[application/hal+json || application/json]}" onto public org.springframework.http.HttpEntity<org.springframework.data.rest.webmvc.RepositoryLinksResource> org.springframework.data.rest.webmvc.RepositoryController.listRepositories()
2017-06-17 22:22:02.604 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/ || ],methods=[HEAD],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<?> org.springframework.data.rest.webmvc.RepositoryController.headForRepositories()
2017-06-17 22:22:02.608 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}/{property}],methods=[GET],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.followPropertyReference(org.springframework.data.rest.webmvc.RootResourceInformation,java.io.Serializable,java.lang.String,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler) throws java.lang.Exception
2017-06-17 22:22:02.608 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}/{property}/{propertyId}],methods=[GET],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.followPropertyReference(org.springframework.data.rest.webmvc.RootResourceInformation,java.io.Serializable,java.lang.String,java.lang.String,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler) throws java.lang.Exception
2017-06-17 22:22:02.609 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}/{property}],methods=[DELETE],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<? extends org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.deletePropertyReference(org.springframework.data.rest.webmvc.RootResourceInformation,java.io.Serializable,java.lang.String) throws java.lang.Exception
2017-06-17 22:22:02.609 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}/{property}],methods=[GET],produces=[application/x-spring-data-compact+json || text/uri-list]}" onto public org.springframework.http.ResponseEntity<org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.followPropertyReferenceCompact(org.springframework.data.rest.webmvc.RootResourceInformation,java.io.Serializable,java.lang.String,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler) throws java.lang.Exception
2017-06-17 22:22:02.610 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}/{property}],methods=[PATCH || PUT || POST],consumes=[application/json || application/x-spring-data-compact+json || text/uri-list],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<? extends org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.createPropertyReference(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.http.HttpMethod,org.springframework.hateoas.Resources<java.lang.Object>,java.io.Serializable,java.lang.String) throws java.lang.Exception
2017-06-17 22:22:02.610 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}/{property}/{propertyId}],methods=[DELETE],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryPropertyReferenceController.deletePropertyReferenceId(org.springframework.data.rest.webmvc.RootResourceInformation,java.io.Serializable,java.lang.String,java.lang.String) throws java.lang.Exception
2017-06-17 22:22:02.616 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/search],methods=[OPTIONS],produces=[application/hal+json || application/json]}" onto public org.springframework.http.HttpEntity<?> org.springframework.data.rest.webmvc.RepositorySearchController.optionsForSearches(org.springframework.data.rest.webmvc.RootResourceInformation)
2017-06-17 22:22:02.617 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/search],methods=[HEAD],produces=[application/hal+json || application/json]}" onto public org.springframework.http.HttpEntity<?> org.springframework.data.rest.webmvc.RepositorySearchController.headForSearches(org.springframework.data.rest.webmvc.RootResourceInformation)
2017-06-17 22:22:02.617 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/search],methods=[GET],produces=[application/hal+json || application/json]}" onto public org.springframework.data.rest.webmvc.RepositorySearchesResource org.springframework.data.rest.webmvc.RepositorySearchController.listSearches(org.springframework.data.rest.webmvc.RootResourceInformation)
2017-06-17 22:22:02.618 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/search/{search}],methods=[GET],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<?> org.springframework.data.rest.webmvc.RepositorySearchController.executeSearch(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.util.MultiValueMap<java.lang.String, java.lang.Object>,java.lang.String,org.springframework.data.rest.webmvc.support.DefaultedPageable,org.springframework.data.domain.Sort,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler,org.springframework.http.HttpHeaders)
2017-06-17 22:22:02.619 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/search/{search}],methods=[GET],produces=[application/x-spring-data-compact+json]}" onto public org.springframework.hateoas.ResourceSupport org.springframework.data.rest.webmvc.RepositorySearchController.executeSearchCompact(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.http.HttpHeaders,org.springframework.util.MultiValueMap<java.lang.String, java.lang.Object>,java.lang.String,java.lang.String,org.springframework.data.rest.webmvc.support.DefaultedPageable,org.springframework.data.domain.Sort,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler)
2017-06-17 22:22:02.620 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/search/{search}],methods=[OPTIONS],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<java.lang.Object> org.springframework.data.rest.webmvc.RepositorySearchController.optionsForSearch(org.springframework.data.rest.webmvc.RootResourceInformation,java.lang.String)
2017-06-17 22:22:02.620 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/search/{search}],methods=[HEAD],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<java.lang.Object> org.springframework.data.rest.webmvc.RepositorySearchController.headForSearch(org.springframework.data.rest.webmvc.RootResourceInformation,java.lang.String)
2017-06-17 22:22:02.623 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}],methods=[OPTIONS],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<?> org.springframework.data.rest.webmvc.RepositoryEntityController.optionsForCollectionResource(org.springframework.data.rest.webmvc.RootResourceInformation)
2017-06-17 22:22:02.624 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}],methods=[HEAD],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<?> org.springframework.data.rest.webmvc.RepositoryEntityController.headCollectionResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.support.DefaultedPageable) throws org.springframework.web.HttpRequestMethodNotSupportedException
2017-06-17 22:22:02.625 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}],methods=[GET],produces=[application/hal+json || application/json]}" onto public org.springframework.hateoas.Resources<?> org.springframework.data.rest.webmvc.RepositoryEntityController.getCollectionResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.support.DefaultedPageable,org.springframework.data.domain.Sort,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler) throws org.springframework.data.rest.webmvc.ResourceNotFoundException,org.springframework.web.HttpRequestMethodNotSupportedException
2017-06-17 22:22:02.625 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}],methods=[GET],produces=[application/x-spring-data-compact+json || text/uri-list]}" onto public org.springframework.hateoas.Resources<?> org.springframework.data.rest.webmvc.RepositoryEntityController.getCollectionResourceCompact(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.support.DefaultedPageable,org.springframework.data.domain.Sort,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler) throws org.springframework.data.rest.webmvc.ResourceNotFoundException,org.springframework.web.HttpRequestMethodNotSupportedException
2017-06-17 22:22:02.626 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}],methods=[POST],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryEntityController.postCollectionResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.PersistentEntityResource,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler,java.lang.String) throws org.springframework.web.HttpRequestMethodNotSupportedException
2017-06-17 22:22:02.626 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}],methods=[OPTIONS],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<?> org.springframework.data.rest.webmvc.RepositoryEntityController.optionsForItemResource(org.springframework.data.rest.webmvc.RootResourceInformation)
2017-06-17 22:22:02.626 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}],methods=[HEAD],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<?> org.springframework.data.rest.webmvc.RepositoryEntityController.headForItemResource(org.springframework.data.rest.webmvc.RootResourceInformation,java.io.Serializable,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler) throws org.springframework.web.HttpRequestMethodNotSupportedException
2017-06-17 22:22:02.627 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}],methods=[GET],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<org.springframework.hateoas.Resource<?>> org.springframework.data.rest.webmvc.RepositoryEntityController.getItemResource(org.springframework.data.rest.webmvc.RootResourceInformation,java.io.Serializable,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler,org.springframework.http.HttpHeaders) throws org.springframework.web.HttpRequestMethodNotSupportedException
2017-06-17 22:22:02.628 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}],methods=[PUT],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<? extends org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryEntityController.putItemResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.PersistentEntityResource,java.io.Serializable,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler,org.springframework.data.rest.webmvc.support.ETag,java.lang.String) throws org.springframework.web.HttpRequestMethodNotSupportedException
2017-06-17 22:22:02.628 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}],methods=[PATCH],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryEntityController.patchItemResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.PersistentEntityResource,java.io.Serializable,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler,org.springframework.data.rest.webmvc.support.ETag,java.lang.String) throws org.springframework.web.HttpRequestMethodNotSupportedException,org.springframework.data.rest.webmvc.ResourceNotFoundException
2017-06-17 22:22:02.629 INFO 1062 --- [ restartedMain] o.s.d.r.w.RepositoryRestHandlerMapping : Mapped "{[/{repository}/{id}],methods=[DELETE],produces=[application/hal+json || application/json]}" onto public org.springframework.http.ResponseEntity<?> org.springframework.data.rest.webmvc.RepositoryEntityController.deleteItemResource(org.springframework.data.rest.webmvc.RootResourceInformation,java.io.Serializable,org.springframework.data.rest.webmvc.support.ETag) throws org.springframework.data.rest.webmvc.ResourceNotFoundException,org.springframework.web.HttpRequestMethodNotSupportedException
2017-06-17 22:22:02.633 INFO 1062 --- [ restartedMain] o.s.d.r.w.BasePathAwareHandlerMapping : Mapped "{[/profile],methods=[GET]}" onto org.springframework.http.HttpEntity<org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.ProfileController.listAllFormsOfMetadata()
2017-06-17 22:22:02.634 INFO 1062 --- [ restartedMain] o.s.d.r.w.BasePathAwareHandlerMapping : Mapped "{[/profile],methods=[OPTIONS]}" onto public org.springframework.http.HttpEntity<?> org.springframework.data.rest.webmvc.ProfileController.profileOptions()
2017-06-17 22:22:02.635 INFO 1062 --- [ restartedMain] o.s.d.r.w.BasePathAwareHandlerMapping : Mapped "{[/profile/{repository}],methods=[OPTIONS],produces=[application/alps+json]}" onto org.springframework.http.HttpEntity<?> org.springframework.data.rest.webmvc.alps.AlpsController.alpsOptions()
2017-06-17 22:22:02.635 INFO 1062 --- [ restartedMain] o.s.d.r.w.BasePathAwareHandlerMapping : Mapped "{[/profile/{repository}],methods=[GET],produces=[application/alps+json || */*]}" onto org.springframework.http.HttpEntity<org.springframework.data.rest.webmvc.RootResourceInformation> org.springframework.data.rest.webmvc.alps.AlpsController.descriptor(org.springframework.data.rest.webmvc.RootResourceInformation)
2017-06-17 22:22:02.636 INFO 1062 --- [ restartedMain] o.s.d.r.w.BasePathAwareHandlerMapping : Mapped "{[/profile/{repository}],methods=[GET],produces=[application/schema+json]}" onto public org.springframework.http.HttpEntity<org.springframework.data.rest.webmvc.json.JsonSchema> org.springframework.data.rest.webmvc.RepositorySchemaController.schema(org.springframework.data.rest.webmvc.RootResourceInformation)
2017-06-17 22:22:02.779 INFO 1062 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2017-06-17 22:22:02.895 INFO 1062 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-06-17 22:22:02.992 INFO 1062 --- [ restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-06-17 22:22:03.002 INFO 1062 --- [ restartedMain] c.r.WorldStats.WorldStatsApplication : Started WorldStatsApplication in 15.161 seconds (JVM running for 16.137)
Exception in thread "restartedMain" java.lang.reflect.InvocationTargetException
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:498)
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Can not deserialize instance of com.ronone.WorldStats.models.BaseCountries out of START_ARRAY token; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of com.ronone.WorldStats.models.BaseCountries out of START_ARRAY token
at [Source: java.io.PushbackInputStream@775df1ae; line: 1, column: 1]
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:244)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:229)
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:96)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:655)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613)
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:287)
at com.ronone.WorldStats.WorldStatsApplication.main(WorldStatsApplication.java:25)
... 5 more
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of com.ronone.WorldStats.models.BaseCountries out of START_ARRAY token
at [Source: java.io.PushbackInputStream@775df1ae; line: 1, column: 1]
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:270)
at com.fasterxml.jackson.databind.DeserializationContext.reportMappingException(DeserializationContext.java:1234)
at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1122)
at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1075)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromArray(BeanDeserializerBase.java:1371)
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:174)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:150)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3798)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2922)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:241)
... 11 more
2017-06-17 22:23:23.932 INFO 1062 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2017-06-17 22:23:23.933 INFO 1062 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2017-06-17 22:23:23.990 INFO 1062 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 56 ms
答案 0 :(得分：2)
您的json to pojo映射不正确。它应该映射到BaseCountries的数组，而不是单独映射到类。
您可以尝试此BaseCountries[] countries = restTemplate.getForObject(uri, BaseCountries[].class, "London");
希望这有帮助！