一张图让你秒懂Spring @Scheduled定时任务的fixedRate,fixedDelay,cron执行差异

https://blog.csdn.net/applebomb/article/details/52400154

看字面意思容易理解,但是任务执行长度超过周期会怎样呢?
不多说,直接上图:


测试代码:

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
 
 
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
 
 
@Component
public class MyProcessor{
    
    DateFormat sdf = new SimpleDateFormat("HH:mm:ss");
    
    int[] delays = new int[]{8,3,6,2,2};
    int index = 0;
    
    @Scheduled(cron = "0/5 * * * * ?}")
    public void process() {
        try {
            if(index > delays.length - 1){
                if(index == delays.length){
                    System.out.println("---------- test end at " + sdf.format(new Date()) + " ---------");
                }
                index ++;
                return;
            }else{
                System.out.println(index + ":start run at" + sdf.format(new Date()));
            }
            Thread.sleep(delays[index] * 1000);
            System.out.println(index + ":end run at " + sdf.format(new Date()));
            index ++; 
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

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作者:applebomb 
来源:CSDN 
原文:https://blog.csdn.net/applebomb/article/details/52400154 
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