SpringBoot 定时任务内使用@Autowired注入Service 获取不到-白红宇

近段时间使用微信Web版的API,实现一个微信机器人, 想每天早上像微信群发送天气预报, 在创建定时任务的时候,发现抛出异常,断点发现是在定时任务里获取不到ChatroomDescriptionService 这个service, 在网上查了查,发现需要手动去配置一个类，主动获取实例来解决这个问题。

首先创建一个工具类:

package com.cherry.jeeves.utils;import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;import org.springframework.stereotype.Component;/** * @className: ApplicationContextUtil * @Description: 解决定时任务获取不到service的问题 * @Author moneylee * @Date 2019-05-11 14:28 * @Version 1.0 **/@Componentpublic class ApplicationContextUtil implements ApplicationContextAware {    private static ApplicationContext applicationContext;    public static ApplicationContext getApplicationContext() {        return applicationContext;    }    @Override    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {        ApplicationContextUtil.applicationContext = applicationContext;    }    public static Object getBean(String beanName) {        return applicationContext.getBean(beanName);    }}复制代码

在serivice上添加注解 @Service("chatroomDescriptionService")

package com.cherry.jeeves.service.Impl;import org.springframework.stereotype.Service;import java.util.Map;import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;import com.baomidou.mybatisplus.core.metadata.IPage;import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;import com.cherry.jeeves.dao.ChatroomDescriptionDao;import com.cherry.jeeves.entity.ChatroomDescriptionEntity;import com.cherry.jeeves.service.ChatroomDescriptionService;@Service("chatroomDescriptionService")public class ChatroomDescriptionServiceImpl extends ServiceImpl
    
      implements ChatroomDescriptionService {}复制代码

在定时任务类中获取该service

ChatroomDescriptionService chatroomDescriptionService = (ChatroomDescriptionService) ApplicationContextUtil.getBean("chatroomDescriptionService");复制代码

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