我正在尝试使用库azure-servicebus-jms-spring-boot-starter将消息发送到主题。一切正常，但是消息作为application/xml类型存储在订阅中，我找不到如何正确设置以将它们存储为application/json的方法。我尝试配置消息转换器以发送ContentType，如这里所述，但这也不起作用。

  @Bean
  public MessageConverter jacksonJmsMessageConverter() {
    final MappingJackson2MessageConverter converter = new MappingJackson2MessageConverter(){
      @Override
      protected TextMessage mapToTextMessage(Object object, Session session, ObjectWriter objectWriter)
          throws JMSException, IOException {
        final TextMessage message = super.mapToTextMessage(object, session, objectWriter);
        message.setStringProperty("ContentType", "application/json");
        return message;
      }
    };
    converter.setTargetType(MessageType.TEXT);
    converter.setTypeIdPropertyName("_type");
    converter.setObjectMapper(objectMapper);
    return converter;
  }