/**
 * 定时任务：处理超时订单
 */
@Scheduled(cron = "0 * * * * ?")//每分钟触发一次
public void processTimeoutOrder() {
    log.info("处理超时订单:{}", LocalDateTime.now());
    LocalDateTime time = LocalDateTime.now().plusMinutes(-15);
    List<Orders> ordersList = orderMapper.getByStatusAndOrderTimeLT(Orders.PENDING_PAYMENT, time);
    if (ordersList != null && !ordersList.isEmpty()) {
        for (Orders orders : ordersList) {
            orders.setStatus(Orders.CANCELLED);
            orders.setCancelReason("订单超时,自动取消");
            orders.setCancelTime(LocalDateTime.now());
            orderMapper.updateById(orders);
        }
    }
}

/**
 * 定时任务：处理一直配送中的订单
 */
@Scheduled(cron = "0 0 1 * * ?")
//每天凌晨1点触发
public void processDeliveryOrder(){
    log.info("处理一直配送中的订单:{}",LocalDateTime.now());
    List<Orders> ordersList = orderMapper.getByStatusAndOrderTimeLT(Orders.DELIVERY_IN_PROGRESS,LocalDateTime.now().plusDays(-1));
    if (ordersList != null && !ordersList.isEmpty()) {
        for (Orders orders : ordersList) {
            orders.setStatus(Orders.COMPLETED);
            orderMapper.updateById(orders);
        }
    }
}

/**
 * 根据状态和订单时间查询订单
 */
@Select("select * from orders where status = #{status} and order_time < #{orderTime}")
List<Orders> getByStatusAndOrderTimeLT(Integer status, LocalDateTime orderTime);

package com.sky.websocket;

import org.springframework.stereotype.Component;
import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

/**
 * WebSocket服务
 */
@Component
@ServerEndpoint("/ws/{sid}")
public class WebSocketServer {

    //存放会话对象
    private static Map<String, Session> sessionMap = new HashMap();

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("sid") String sid) {
        System.out.println("客户端：" + sid + "建立连接");
        sessionMap.put(sid, session);
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, @PathParam("sid") String sid) {
        System.out.println("收到来自客户端：" + sid + "的信息:" + message);
    }

    /**
     * 连接关闭调用的方法
     *
     * @param sid
     */
    @OnClose
    public void onClose(@PathParam("sid") String sid) {
        System.out.println("连接断开:" + sid);
        sessionMap.remove(sid);
    }

    /**
     * 群发
     *
     * @param message
     */
    public void sendToAllClient(String message) {
        Collection<Session> sessions = sessionMap.values();
        for (Session session : sessions) {
            try {
                //服务器向客户端发送消息
                session.getBasicRemote().sendText(message);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

}

package com.sky.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

/**
 * WebSocket配置类，用于注册WebSocket的Bean
 */
@Configuration
public class WebSocketConfiguration {

    @Bean
    public ServerEndpointExporter serverEndpointExporter() {
        return new ServerEndpointExporter();
    }

}

package com.sky.task;

import com.sky.websocket.WebSocketServer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

@Component
public class WebSocketTask {
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 通过WebSocket每隔5秒向客户端发送消息
     */
    @Scheduled(cron = "0/5 * * * * ?")
    public void sendMessageToClient() {
        webSocketServer.sendToAllClient("这是来自服务端的消息：" + DateTimeFormatter.ofPattern("HH:mm:ss").format(LocalDateTime.now()));
    }
}

@Autowired
private WebSocketServer webSocketServer;
/**
 * 支付成功，修改订单状态
 */
@Override
@Transactional
public void paySuccess(String outTradeNo) {

    // 根据订单号查询订单
    LambdaQueryWrapper<Orders> queryWrapper = new LambdaQueryWrapper<>();
    queryWrapper.eq(Orders::getNumber, outTradeNo);
    Orders ordersDB = orderMapper.selectOne(queryWrapper);

    // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
    Orders orders = Orders.builder()
            .id(ordersDB.getId())
            .status(Orders.TO_BE_CONFIRMED)
            .payStatus(Orders.PAID)
            .checkoutTime(LocalDateTime.now())
            .build();
    orderMapper.updateById(orders);

    //通过WebSocket向客户端发送消息 type , orderId ,content
    Map map = new HashMap();
    map.put("type", 1);//1表示来单提醒
    map.put("orderId", ordersDB.getId());
    map.put("content", "订单号： " + outTradeNo + " 有新订单，请及时处理！");

    String json = JSON.toJSONString(map);
    webSocketServer.sendToAllClient(json);
}

/**
 * 催单
 */
@GetMapping("/reminder/{id}")
@ApiOperation("催单")
public Result reminder(@PathVariable("id") Long id) {
    orderService.reminder(id);
    return Result.success();
}

/**
 * 催单
 */
void reminder(Long id);

/**
 * 催单
 */
@Override
public void reminder(Long id) {
    Orders ordersDB = orderMapper.selectById(id);

    if (ordersDB == null) {
        throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
    }
    Map map = new HashMap();
    map.put("type", 2);//2表示催单提醒
    map.put("orderId", ordersDB.getId());
    map.put("content", "订单号： " + ordersDB.getNumber() + " 有催单，请及时处理！");
    String json = JSON.toJSONString(map);
    webSocketServer.sendToAllClient(json);
}