Java定时任务取消的示例代码

import java.util.Calendar;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
public class Main {
    public static void main(String[] args) {
        // 创建一个ScheduledExecutorService对象
        ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
        // 获取当前时间
        Calendar now = Calendar.getInstance();
        // 计算下一个周二晚上6点的时间
        Calendar nextExecutionTime = getNextExecutionTime(now);
        // 计算当前时间到下一个执行时间的时间间隔
        long initialDelay = nextExecutionTime.getTimeInMillis() - now.getTimeInMillis();
        // 创建定时任务
        ScheduledFuture<?> future = executor.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                // 自动生成devops流水线的代码
                System.out.println("Generating devops pipeline...");
            }
        }, initialDelay, 7 * 24 * 60 * 60 * 1000, TimeUnit.MILLISECONDS);
        // 在需要时取消定时任务
        // future.cancel(true);
        // 关闭ScheduledExecutorService
        // executor.shutdown();
    }
    private static Calendar getNextExecutionTime(Calendar now) {
        Calendar nextExecutionTime = (Calendar) now.clone();
        nextExecutionTime.set(Calendar.DAY_OF_WEEK, Calendar.TUESDAY);
        nextExecutionTime.set(Calendar.HOUR_OF_DAY, 18);
        nextExecutionTime.set(Calendar.MINUTE, 0);
        nextExecutionTime.set(Calendar.SECOND, 0);
        nextExecutionTime.set(Calendar.MILLISECOND, 0);
        if (nextExecutionTime.before(now)) {
            nextExecutionTime.add(Calendar.WEEK_OF_YEAR, 1);
        }
        return nextExecutionTime;
    }
}