Republishing failed message to exchange 'sl.exchange.topic.error' with routing key sl-express-transport

根据提供的引用内容，以下是重新发布失败消息到交换机 'sl.exchange.topic.error' 并使用路由键 'sl-express-transport' 的示例代码：

import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class MessageRepublisher {

    private RabbitTemplate rabbitTemplate;

    @Autowired
    public MessageRepublisher(RabbitTemplate rabbitTemplate) {
        this.rabbitTemplate = rabbitTemplate;
    }

    public void republishFailedMessage() {
        String exchange = "sl.exchange.topic.error";
        String routingKey = "sl-express-transport";
        String failedMessage = "Failed message content";

        rabbitTemplate.convertAndSend(exchange, routingKey, failedMessage);
    }
}

请注意，上述示例是使用Spring Boot和RabbitMQ的Java代码。您需要确保在项目中正确配置RabbitMQ，并将上述代码与您的项目集成。