3步搞定命运2单人模式:终极防火墙解决方案
2026/8/4 2:44:43
以下是对基于JAVA的上门洗车APP系统源码的详细解析,涵盖技术架构、核心功能、关键代码示例及市场应用价值:
设备通信(MQTT)
java
@Service public class DeviceService { @Autowired private MqttClient mqttClient; public void sendCommand(String deviceId, String command) { String topic = "device/" + deviceId + "/command"; MqttMessage message = new MqttMessage(command.getBytes()); mqttClient.publish(topic, message); } @MqttCallback public void messageArrived(String topic, MqttMessage message) { String deviceId = topic.split("/")[1]; String status = new String(message.getPayload()); deviceRepository.updateStatus(deviceId, status); } }支付回调处理
java
@RestController @RequestMapping("/api/payment") public class PaymentController { @Autowired private OrderService orderService; @PostMapping("/notify") public String handlePaymentNotify(@RequestBody Map<String, String> params) { String orderId = params.get("out_trade_no"); String resultCode = params.get("result_code"); if ("SUCCESS".equals(resultCode)) { orderService.updateOrderStatus(Long.parseLong(orderId), OrderStatus.PAID); return "<xml><return_code><![CDATA[SUCCESS]]></return_code></xml>"; } return "<xml><return_code><![CDATA[FAIL]]></return_code></xml>"; } }