Apache Camel 的 JsonMappingException [英] JsonMappingException with Apache Camel

问题描述

我遇到了骆驼路线的异常

I am getting below exception with Camel Route

Caused by: com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class org.apache.camel.converter.stream.InputStreamCache and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)
    at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:284)
    at com.fasterxml.jackson.databind.SerializerProvider.mappingException(SerializerProvider.java:1110)
    at com.fasterxml.jackson.databind.SerializerProvider.reportMappingProblem(SerializerProvider.java:1135)
    at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:69)
    at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:32)
    at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:292)
    at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1429)
    at com.fasterxml.jackson.databind.ObjectWriter._configAndWriteValue(ObjectWriter.java:1158)

骆驼路线:

restConfiguration().producerComponent("http4").host("localhost").port(9080);


    from("direct:getSubscriptions")
        .hystrix()
        .to("rest:get:testendpoint?carrier={carrier}&flightNumber={flightNumber}&origin={origin}&destination={destination}&date={date}")
        .log(">> - ${body}")
        .marshal().json(JsonLibrary.Jackson)
        .split().jsonpathWriteAsString("$.[1]", true)
        .log("${body}");

不确定我做对了吗?任何建议将不胜感激

Not sure I am doing it correct? Any suggestions will be appreciated

推荐答案

在将正文编组为 json 之前将其转换为字符串.您可以在元帅之前添加 .convertBodyTo(String.class) .问题是您正在发送一个流，而 jackson 不知道如何对其进行序列化.

Convert your body to string before marshaling it to json. You can add .convertBodyTo(String.class) before your marshal. The issue is that you are sending a stream and jackson doesn't know how to serialize it.

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