我正在设置一个RESTful服务，该服务的端点接受POST请求并对其进行处理。发布请求的正文包含Session类型的JSON对象。当端点定义手动采用JSON并使用ObjectMapper将其转换为Session时，一切正常。但是，当我的端点定义暗示它接收到Session类时，我会收到以下错误：
SEVERE: Servlet.service() for servlet [RestfulJersey2] in context with path [/RestfulJersey2] threw exception [javax.ws.rs.ProcessingException: Error deserializing object from entity stream.] with root cause
java.lang.IllegalAccessException: Class org.eclipse.yasson.internal.ReflectionUtils can not access a member of class com.javapapers.webservices.rest.jersey.metrics.Session with modifiers ""
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102)
at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296)
at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288)
at java.lang.reflect.Constructor.newInstance(Constructor.java:413)
at org.eclipse.yasson.internal.ReflectionUtils.lambda$createNoArgConstructorInstance$1(ReflectionUtils.java:208)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.yasson.internal.ReflectionUtils.createNoArgConstructorInstance(ReflectionUtils.java:202)
at org.eclipse.yasson.internal.serializer.ObjectDeserializer.getInstance(ObjectDeserializer.java:93)
at org.eclipse.yasson.internal.serializer.AbstractContainerDeserializer.deserialize(AbstractContainerDeserializer.java:63)
at org.eclipse.yasson.internal.Unmarshaller.deserializeItem(Unmarshaller.java:61)
at org.eclipse.yasson.internal.Unmarshaller.deserialize(Unmarshaller.java:51)
at org.eclipse.yasson.internal.JsonBinding.deserialize(JsonBinding.java:45)
at org.eclipse.yasson.internal.JsonBinding.fromJson(JsonBinding.java:85)
at org.glassfish.jersey.jsonb.internal.JsonBindingProvider.readFrom(JsonBindingProvider.java:75)
at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.invokeReadFrom(ReaderInterceptorExecutor.java:233)
at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.aroundReadFrom(ReaderInterceptorExecutor.java:212)
at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:132)
at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundReadFrom(MappableExceptionWrapperInterceptor.java:49)
at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:132)
at org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:1067)
at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:850)
at org.glassfish.jersey.server.ContainerRequest.readEntity(ContainerRequest.java:247)
at org.glassfish.jersey.server.internal.inject.EntityParamValueParamProvider$EntityValueSupplier.apply(EntityParamValueParamProvider.java:73)
at org.glassfish.jersey.server.internal.inject.EntityParamValueParamProvider$EntityValueSupplier.apply(EntityParamValueParamProvider.java:56)
at org.glassfish.jersey.server.spi.internal.ParamValueFactoryWithSource.apply(ParamValueFactoryWithSource.java:50)
at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getParameterValues(ParameterValueHelper.java:68)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$AbstractMethodParamInvoker.getParamValues(JavaResourceMethodDispatcherProvider.java:109)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$VoidOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:159)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:469)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:391)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:80)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:253)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:232)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:679)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:392)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:365)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:318)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
我确保两个成员变量都是公共的，并尝试以不同的方式重新格式化JSON，但是还没有任何效果。我正在运行Apache Tomcat 9。
可行的端点版本：
@POST @Path("/post/session") @Produces("application/json")
@Consumes(MediaType.APPLICATION_JSON)
public void receivedSession(String json) {
ObjectMapper objectMapper = new ObjectMapper();
try {
Session result = objectMapper.readValue(json, Session.class);
System.out.println(result.getSessionTime());
service.receivedSession(result);
} catch (JsonProcessingException e) {
// TODO Auto-generated catch block
System.out.println(e.getLocalizedMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println(e.getLocalizedMessage());
}
}
不起作用的端点版本
@POST @Path("/post/session") @Produces("application/json")
@Consumes(MediaType.APPLICATION_JSON)
public void receivedSession(Session json) {
service.receivedSession(json);
}
这是会话类：
public class Session {
public int sessionTime;
public HashMap<String,String> demographicToken;
Session() {
sessionTime = 0;
demographicToken = new HashMap<String,String>();
}
Session(int time, HashMap<String,String> demoToken) {
this.sessionTime = time;
this.demographicToken = demoToken;
}
public int getSessionTime() {
return sessionTime;
}
public Map<String, String> getDemographicToken() {
return demographicToken;
}
}