定时任务出现这个错误,是因为是因为@Scheduled注解方式级别高于资源注入级别,导致资源注入失败.

示例:

@Component
@Lazy(value = false)
public class AlertTask {

    @Autowired
    IOTDeviceService iOTDeviceService;

    /**
     * @Description 定时获取数据更新本地数据
     * @param
     * @throws
     * @Return void
     * @Date 2019-11-01 09:15:17
     * @Author WangKun
     **/
    @Scheduled(cron = "0/5 * * * * ?")//每两分钟执行一次0 */2 * * * ?
    public void getEquipmentDataAlert() throws Exception {
          iOTDeviceService.findxx();
    }

报错:2019-11-01 09:31:20.005 [pool-2-thread-1] ERROR o.s.s.s.TaskUtils$LoggingErrorHandler - Unexpected error occurred in scheduled task.

修改:

 使用ApplicationContextAware,它实现了这个接口的bean，当spring容器初始化的时候，会自动的将ApplicationContext注入进来

示例:

@Component
@Lazy(value = false)
public class AlertTask implements ApplicationContextAware {

    private static ApplicationContext context;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        context = applicationContext;
    }
    public static ApplicationContext getApplicationContext() {
        return context;
    }

    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    /**
     * @Description 定时获取数据更新本地数据
     * @param
     * @throws
     * @Return void
     * @Date 2019-11-01 09:15:17
     * @Author WangKun
     **/
    @Scheduled(cron = "0/5 * * * * ?")//每两分钟执行一次0 */2 * * * ?
    public void getEquipmentDataAlert() throws Exception {
        IOTDeviceService iOTDeviceService = (IOTDeviceService)this.getBean("iOTDeviceService");

                iOTDeviceService.findxx();

        }

启动定时任务正常.

也可以将implements ApplicationContextAware抽出来,封装一个工具类.

package com.harmonywisdom.ajproduct.ajproduct.task.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * @Description 定时任务service注入工具
 * @Author WangKun
 * @Date 2019/10/31 17:22
 * @Version
 */
public class TaskUtil implements ApplicationContextAware {

    private static ApplicationContext context;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        context = applicationContext;
    }


    public static ApplicationContext getApplicationContext() {
        return context;
    }

    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }
}