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Question

使用spring-boot-stream读取队列/ Exchange rabbitMQ时，它将返回以下Exception：

Unable to deserialize [br.com.foo.Bar] using the contentType [application/x-java-object;type=br.com.foo.Bar] br.com.foo.Bar; nested exception is java.lang.ClassNotFoundException

我了解在我的应用程序的bar中找不到类package，但是我想通过忽略contentType来接收此消息，因此我可以在任何满足以下条件的类中接收该消息：实现属性。

是否可以跳过或绕过此header？

@EnableBinding(CustomExchange.class)
public class RabbitService {

    @StreamListener(target = CustomExchange.INPUT)
    public void recievedMessage(Message<br.etc.Bar> msg) {
        try {
            Bar bar = msg.getPayload();

            //faz algo
        } catch (Exception e) {
            // faz algo
        } 
    }
}

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<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-stream-binder-rabbit</artifactId>
    <version>1.3.0.RELEASE</version>
</dependency>

Answer 1

可以升级到2.0.1吗？默认序列化技术使用JSON而不是Kryo。

在1.3.x中，您可以通过将出站绑定的contentType设置为application/json来更改为JSON。

编辑

这对我来说很好...

@SpringBootApplication
@EnableBinding(Processor.class)
public class So52938080Application {

    public static void main(String[] args) {
        SpringApplication.run(So52938080Application.class, args);
    }

    @StreamListener(Processor.INPUT)
    public void listen(Message<Bar> message) {
        System.out.println(message);
    }

    @Bean
    public ApplicationRunner runner(MessageChannel output) {
        return args -> {
            output.send(new GenericMessage<>(new Foo("baz")));
        };
    }

    public static class Foo {

        private String bar;

        public Foo() {
            super();
        }

        public Foo(String bar) {
            this.bar = bar;
        }

        public String getBar() {
            return this.bar;
        }

        public void setBar(String bar) {
            this.bar = bar;
        }

    }

    public static class Bar {

        private String bar;

        public Bar() {
            super();
        }

        public String getBar() {
            return this.bar;
        }

        public void setBar(String bar) {
            this.bar = bar;
        }

        @Override
        public String toString() {
            return "Bar [bar=" + this.bar + "]";
        }

    }

}

和

spring.cloud.stream.bindings.output.destination=foo
spring.cloud.stream.bindings.output.content-type=application/json
spring.cloud.stream.bindings.input.destination=foo
spring.cloud.stream.bindings.input.content-type=application/json
spring.cloud.stream.bindings.input.group=foo

和

GenericMessage [有效载荷=栏[栏=巴兹]，标头= {amqp_receivedDeliveryMode = PERSISTENT，amqp_receivedRoutingKey = foo，amqp_receivedExchange = foo，amqp_deliveryTag = 1，amqp_consumerQueue = foo.foo，amqp_redelivered45 = 6，-4889 -b7bc-16c9ade11941，amqp_consumerTag = amq.ctag-GGu9q7nO6KTpZ-NRwTe9xA，contentType = application / json; charset = UTF-8，timestamp = 1540247495149}]

RabbitMQ忽略标题内容类型

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1 个答案: