SpringBoot定时任务使用

一、简单介绍

SpringBoot天然集成定时任务,在使用时只需要在启动类上添加注解,然后在实现类上添加@Component便可使用,基本上没有什么难度。

二、代码实现

启动类代码实现

package com.atguigu.staservice;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication
@ComponentScan(basePackages = {"com.atguigu"})
@EnableDiscoveryClient
@EnableFeignClients
@MapperScan("com.atguigu.staservice.mapper")
@EnableScheduling
public class StaApplication {

    public static void main(String[] args) {
        SpringApplication.run(StaApplication.class, args);
    }
}

定时任务类

package com.atguigu.staservice.schedule;

import com.atguigu.staservice.service.StatisticsDailyService;
import com.atguigu.staservice.utils.DateUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class ScheduledTask {

    @Autowired
    private StatisticsDailyService staService;

    // 0/5 * * * * ?表示每隔5秒执行一次这个方法
    @Scheduled(cron = "0/5 * * * * ?")
    public void task1() {
        System.out.println("**************task1执行了..");
    }

    //在每天凌晨1点，把前一天数据进行数据查询添加
    @Scheduled(cron = "0 0 1 * * ?")
    public void task2() {
        staService.registerCount(DateUtil.formatDate(DateUtil.addDays(new Date(), -1)));
    }
}

日期工具类

package com.atguigu.staservice.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

/**
 * 日期操作工具类
 *
 * @author qy
 * @since 1.0
 */
public class DateUtil {

    private static final String dateFormat = "yyyy-MM-dd";

    /**
     * 格式化日期
     *
     * @param date
     * @return
     */
    public static String formatDate(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
        return sdf.format(date);

    }

    /**
     * 在日期date上增加amount天 。
     *
     * @param date   处理的日期，非null
     * @param amount 要加的天数，可能为负数
     */
    public static Date addDays(Date date, int amount) {
        Calendar now =Calendar.getInstance();
        now.setTime(date);
        now.set(Calendar.DATE,now.get(Calendar.DATE)+amount);
        return now.getTime();
    }

    public static void main(String[] args) {
        System.out.println(DateUtil.formatDate(new Date()));
        System.out.println(DateUtil.formatDate(DateUtil.addDays(new Date(), -1)));
    }
}