java RabbitMQ死信队列解决订单未支付取消代码

以下是Java RabbitMQ死信队列解决订单未支付取消的代码示例：

// 创建连接工厂 ConnectionFactory factory = new ConnectionFactory(); factory.setHost("localhost"); factory.setUsername("guest"); factory.setPassword("guest");

// 创建连接 Connection connection = factory.newConnection();

// 创建订单队列 String orderQueueName = "order_queue"; channel.queueDeclare(orderQueueName, true, false, false, null);

// 创建死信队列 String deadLetterQueueName = "dead_letter_queue"; channel.queueDeclare(deadLetterQueueName, true, false, false, null);

// 设置死信队列属性 Map<String, Object> args = new HashMap<String, Object>(); args.put("x-dead-letter-exchange", ""); args.put("x-dead-letter-routing-key", deadLetterQueueName); channel.queueDeclare(orderQueueName, true, false, false, args);

// 创建订单消费者 Consumer orderConsumer = new DefaultConsumer(channel) { @Override public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException { String message = new String(body, "UTF-8"); // 处理订单取消逻辑，如果订单未支付，则将订单消息发送到死信队列 if (!isOrderPaid(message)) { channel.basicPublish("", deadLetterQueueName, null, message.getBytes("UTF-8")); } else { // 处理订单支付逻辑 } } };

// 订阅订单队列 channel.basicConsume(orderQueueName, true, orderConsumer)