无法识别的标记 'message'：期待（JSON 字符串、数字、数组、对象或标记 'null'、'true' 或 'false'）

Question

当我发送 post 请求时，出现此错误。

Caused by: com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'message': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')
 at [Source: (io.netty.buffer.ByteBufInputStream); line: 1, column: 9]

这是堆栈跟踪：

Stack trace:
        at org.springframework.http.codec.json.AbstractJackson2Decoder.processException(AbstractJackson2Decoder.java:242) ~[spring-web-5.3.12.jar:5.3.12]
        at org.springframework.http.codec.json.AbstractJackson2Decoder.decode(AbstractJackson2Decoder.java:198) ~[spring-web-5.3.12.jar:5.3.12]
        at org.springframework.http.codec.json.AbstractJackson2Decoder.lambda$decodeToMono(AbstractJackson2Decoder.java:179) ~[spring-web-5.3.12.jar:5.3.12]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:125) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:295) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1816) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:159) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) ~[reactor-core-3.4.11.jar:3.4.11]
        at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:400) ~[reactor-netty-core-1.0.12.jar:1.0.12]
        at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:419) ~[reactor-netty-core-1.0.12.jar:1.0.12]
        at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:473) ~[reactor-netty-core-1.0.12.jar:1.0.12]
        at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:702) ~[reactor-netty-http-1.0.12.jar:1.0.12]

我有这样一个 JSON 从客户端发送到服务器。

{
  "message": "string",
  "originator": "string",
  "receivers": "string"
}

这是我的服务层方法，它在其中生成 Webclient 代码。

   @Override
    public Mono<ResponseEntity<? extends ResponseResource>> sendSms(BulkSmsRequestResourceTest request) {
        if (request == null) {
            return Mono.just(new ResponseEntity<>(
                    new ErrorResponseResource(
                            "Transaction failed unsuccessfully!",
                            400),
                    HttpStatus.BAD_REQUEST));
        }
        Mono<BulkSmsRequestResourceTest> bulkSmsRequestResourceMono = webClientBuilder.build()
                .post()
                .uri(sendSmsService)
                .contentType(MediaType.APPLICATION_JSON)
                .accept(MediaType.APPLICATION_JSON)
                .body(Mono.just(request), BulkSmsRequestResourceTest.class)
                .retrieve()
                .bodyToMono(BulkSmsRequestResourceTest.class);
        bulkSmsRequestResourceMono.subscribe();
        return Mono.just((new ResponseEntity<>(new SuccessResponseResource("Transaction done successfully", 200), HttpStatus.OK)));
    }

虽然出现错误，但数据已成功存储到数据库中。

我是dto class

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class BulkSmsRequestResourceTest {

    @JsonProperty("message")
    private String message;

    @JsonProperty("receivers")
    private String receivers;
    
    @JsonProperty("originator")
    private String originator;

}

这是我的服务器响应代码：

@Override
public String save(BulkSmsRequestDto bulkSmsRequestDto) {
if (bulkSmsRequestDto == null) {
    return "message unsuccess sended";
}
BulkSms bulkSms = BulkSms.builder()
        .message(bulkSmsRequestDto.getMessage())
        .phoneNumber(bulkSmsRequestDto.getReceivers())
        .originator(bulkSmsRequestDto.getOriginator())
        .build();
this.bulkSmsRepository.save(bulkSms);
return "message success sended";
}

Answer 1

在我看来，您发送的 message 属性根本不是您所调用的服务所期望的。

您正在将 BulkSmsRequestResourceTest 设置为正文请求和正文响应。您确定服务器在请求中期望 message 属性并且还会在响应中包含 message 吗？

您的附加代码只是表明这是事实。您的服务器使用简单的 String（“消息发送成功”）进行应答，但您希望它是一个对象 (BulkSmsRequestResourceTest)。请将您的代码更新为以下代码：

@Override
public Mono<ResponseEntity<? extends ResponseResource>> sendSms(BulkSmsRequestResourceTest request) {
   if (request == null) {
       return Mono.just(new ResponseEntity<>(
               new ErrorResponseResource(
                       "Transaction failed unsuccessfully!",
                       400),
               HttpStatus.BAD_REQUEST));
   }
   Mono<String> bulkSmsRequestResourceMono = webClientBuilder.build()
           .post()
           .uri(sendSmsService)
           .contentType(MediaType.APPLICATION_JSON)
           .accept(MediaType.APPLICATION_JSON)
           .body(Mono.just(request), BulkSmsRequestResourceTest.class)
           .retrieve()
           .bodyToMono(String.class);
   bulkSmsRequestResourceMono.subscribe();
   return Mono.just((new ResponseEntity<>(new SuccessResponseResource("Transaction done successfully", 200), HttpStatus.OK)));
}

Answer 2

如果服务器收到您的请求并执行了预期的逻辑，问题应该与其 Json 响应和您的 BulkSmsRequestResourceTest class.[=14= 的结构有关]

错误发生在反序列化过程中，因此您的客户端有一些数据需要转换。可能是您的 class 或您的对象映射器设置配置不正确。

如果您需要更多信息，您应该分享：

Json 回应
BulkSmsRequestResourceTest class
ObjectMapper 设置或判断是否是默认设置

无法识别的标记 'message'：期待（JSON 字符串、数字、数组、对象或标记 'null'、'true' 或 'false'）

Unrecognized token 'message': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')

java

rest

client

webclient

spring-boot