【Cannot convert from [[B] to】 @RabbitListener 反序列化报错

最新推荐文章于 2024-08-09 15:18:12 发布

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最新推荐文章于 2024-08-09 15:18:12 发布

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本文链接：https://blog.youkuaiyun.com/pltang/article/details/103994214

本文详细解析了在SpringBoot2.0环境下整合RabbitMQ过程中遇到的问题，特别是在使用自定义对象进行消息传递时出现的转换错误。通过调整配置，如引入Jackson2JsonMessageConverter，成功解决了对象序列化和反序列化的问题。

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1.环境：springboot2.0
<!-- rabbitMq 引用包-->
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-amqp</artifactId>
</dependency>

此服务生产端和消费端在同一个服务里，存储自定义对象没有问题，读取信息转成自定义对象报错。

2.报错信息

Endpoint handler details:
Method [public void com.xuexin.data.center.consumer.OrganMsgConsumer.process(com.xxxx.xxx.data.center.entity.EhrOrganInfo)]
Bean [com.xxxx.data.center.consumer.OrganMsgConsumer@20cd13d0]
    at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:191)
    at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.onMessage(MessagingMessageListenerAdapter.java:126)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:1414)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.actualInvokeListener(AbstractMessageListenerContainer.java:1337)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:1324)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:1303)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:817)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:801)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$700(SimpleMessageListenerContainer.java:77)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1042)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.messaging.converter.MessageConversionException: Cannot convert from [[B] to [com.xxx.xxxx.data.center.entity.EhrOrganInfo] for GenericMessage [payload=byte[190], headers={amqp_receivedDeliveryMode=PERSISTENT, amqp_receivedRoutingKey=MQ_EHR_ORGANS, amqp_contentEncoding=UTF-8, amqp_deliveryTag=1, amqp_consumerQueue=MQ_EHR_ORGANS, amqp_redelivered=false, id=f4ed04ef-18b4-8ad8-21a0-a0a7871cc11c, amqp_consumerTag=amq.ctag-KUOrbMAp9Cr-su_53T9NsQ, contentType=application/json, __TypeId__=com.xuexin.xcloud.data.center.entity.EhrOrganInfo, timestamp=1579069885047}]
    at org.springframework.messaging.handler.annotation.support.PayloadArgumentResolver.resolveArgument(PayloadArgumentResolver.java:144)
    at org.springframework.messaging.handler.invocation.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:116)
    at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:137)
    at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:109)
    at org.springframework.amqp.rabbit.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:51)
    at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:188)
    ... 10 common frames omitted


3.解決方法:在RabbitConfig.java 中添加红色部分代码

import org.springframework.amqp.core.Queue;

import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitAdmin;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class RabbitConfig {
    @Value("${spring.rabbitmq.host}")
    private String addresses;
    @Value("${spring.rabbitmq.port}")
    private Integer port;
    @Value("${spring.rabbitmq.username}")
    private String username;
    @Value("${spring.rabbitmq.password}")
    private String password;
    public RabbitConfig() {
    }
    @Bean
    public ConnectionFactory connectionFactory() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        connectionFactory.setAddresses(this.addresses);
        connectionFactory.setPort(this.port);
        connectionFactory.setUsername(this.username);
        connectionFactory.setPassword(this.password);
        return connectionFactory;
    }
    @Bean
    public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
        return new RabbitAdmin(connectionFactory);
    }
    @Bean
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate rabbitTemplate = new RabbitTemplate(this.connectionFactory());
        rabbitTemplate.setMessageConverter(new Jackson2JsonMessageConverter());
        return rabbitTemplate;
    }
    @Bean
    public Queue organQueue() {
        return new Queue("MQ_KEY");
    }
/**
     * 解决方法:添加这个类进行序列化解析
     * 会自动识别
     * @param objectMapper json序列化实现类
     * @return mq 消息序列化工具
     */
    @Bean
    public MessageConverter jsonMessageConverter(ObjectMapper objectMapper) {
        return new Jackson2JsonMessageConverter(objectMapper);
    }
}