您可以配置JsonSerializer和JsonDeserializer作为@Bean。ObjectMapper向他们注入期望。并在DefaultKafkaProducerFactory和DefaultKafkaConsumerFactorybean定义中使用这些bean ：
@Bean
public ProducerFactory<Integer, String> producerFactory() {
DefaultKafkaProducerFactory<Integer, String> producerFactory =
new DefaultKafkaProducerFactory<>(producerConfigs());
producerFactory.setValueSerializer(jsonSerializer());
return producerFactory;
}
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