我正在尝试播放一些这样的示例代码：
@GetMapping("/unsupport")
public Mono<Void> unsupport(ServerWebExchange exchange) {
return exchange.getResponse().writeWith(Mono.just(exchange.getResponse().bufferFactory().wrap("unsupport".getBytes(StandardCharsets.UTF_8))));
}
然后我得到了 UnsupportedOperationException 和下面的堆栈：
在 java.util.Collections$UnmodifiableMap.put(Unknown Source) 在 org.springframework.http.HttpHeaders.set(HttpHeaders.java:1451) 在 org.springframework.http.HttpHeaders.setContentType(HttpHeaders.java:854) 在 org .springframework.http.codec.EncoderHttpMessageWriter.updateContentType(EncoderHttpMessageWriter.java:132) at org.springframework.http.codec.EncoderHttpMessageWriter.write(EncoderHttpMessageWriter.java:100) at org.springframework.http.codec.EncoderHttpMessageWriter.write(EncoderHttpMessageWriter .java:167) 在 org.springframework.web.reactive.result.method.annotation.AbstractMessageWriterResultHandler.writeBody(AbstractMessageWriterResultHandler.java:146) 在 org.springframework.web.reactive.result.method.annotation.ResponseEntityResultHandler.lambda$handleResult $2(ResponseEntityResultHandler.java:174) 在 reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:141) 在 reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:53) 在 reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java :44) 在 reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150) 在 reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1080) 在 reactor.core.publisher.MonoFlatMap$ FlatMapInner.onNext(MonoFlatMap.java:241) 在 reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:73) 在 reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1080) 在 reactor .core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144) 在 reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1080) 在 reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:241) 在 reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:323) 在 reactor.core.publisher.Operators $ScalarSubscription.request(Operators.java:1637) 在 reactor.core.publisher.MonoZip$ZipInner.onSubscribe(MonoZip.java:312) 在 reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) 在反应堆。 core.publisher.Mono.subscribe(Mono.java:3080) 在 reactor.core.publisher.MonoZip.subscribe(MonoZip.java:128) 在 reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) 在 reactor .core.publisher.Mono.subscribe(Mono.java:3080) 在 reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:97) 在 reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber。onError(FluxPeekFuseable.java:222) 在 reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onError(FluxPeekFuseable.java:222) 在 reactor.core.publisher.Operators$MonoSubscriber.onError(Operators.java:1123) 在 reactor.core .publisher.MonoIgnoreThen$ThenAcceptInner.onError(MonoIgnoreThen.java:300) 在 reactor.core.publisher.MonoFlatMap$FlatMapMain.secondError(MonoFlatMap.java:185) 在 reactor.core.publisher.MonoFlatMap$FlatMapInner.onError(MonoFlatMap.java :251) 在 reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.ignoreDone(MonoIgnoreThen.java:185) 在 reactor.core.publisher.MonoIgnoreThen$ 的 reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:133) ThenIgnoreInner.onComplete(MonoIgnoreThen.java:234) 在 org.springframework.http.server.reactive。ChannelSendOperator$WriteCompletionBarrier.onComplete(ChannelSendOperator.java:373) 在 reactor.core.publisher.MonoIgnoreElements$IgnoreElementsSubscriber.onComplete(MonoIgnoreElements.java:80) 在 reactor.core.publisher.FluxConcatIterable$ConcatIterableSubscriber.onComplete(FluxConcatIterable.java:115)在 reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:96) 在 org.springframework.http.server.reactive.WriteResultPublisher$State.publishComplete(WriteResultPublisher.java:229) 在 org.springframework.http.server .reactive.WriteResultPublisher.publishComplete(WriteResultPublisher.java:69) 在 org.springframework.http.server.reactive.AbstractListenerWriteFlushProcessor$State$3.writeComplete(AbstractListenerWriteFlushProcessor.java:250) 在 org.springframework.http.server.reactive。AbstractListenerWriteFlushProcessor$State$WriteResultSubscriber.onComplete(AbstractListenerWriteFlushProcessor.java:374) 在 org.springframework.http.server.reactive.WriteResultPublisher$State.publishComplete(WriteResultPublisher.java:229) 在 org.springframework.http.server.reactive.WriteResultPublisher。在 org.springframework.http.server.reactive.AbstractListenerWriteProcessor.access$400 的 org.springframework.http.server.reactive.AbstractListenerWriteProcessor.changeStateToComplete(AbstractListenerWriteProcessor.java:209) 的 publishComplete(WriteResultPublisher.java:69)(AbstractListenerWriteProcessor.java:44) ) 在 org.springframework.http.server.reactive 的 org.springframework.http.server.reactive.AbstractListenerWriteProcessor$State$3.onWritePossible(AbstractListenerWriteProcessor.java:289)。AbstractListenerWriteProcessor.onWritePossible(AbstractListenerWriteProcessor.java:103) at org.springframework.http.server.reactive.ServletServerHttpResponse$ResponseBodyWriteListener.onWritePossible(ServletServerHttpResponse.java:238) at org.apache.coyote.Response.onWritePossible(Response.java:700)在 org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:188) 在 org.apache.coyote.AbstractProcessor.dispatch(AbstractProcessor.java:232) 在 org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java :49) 在 org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468) 上的 org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)。 tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) 在 java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread .java:61) 在 java.lang.Thread.run(Unknown Source)
HttpHeaders 似乎是以不可变的方式创建的。
我做错了什么还是这是一个错误？
谢谢
莱昂