JUC--黑马|JUC并发编程 -- 线程池应用之定时任务（在每周周四执行定时任务） JUC--黑马|线程池

1. 线程池应用之定时任务

【JUC--黑马|JUC并发编程 -- 线程池应用之定时任务（在每周周四执行定时任务）】示例: 在每周周四执行定时任务

package com.tian; import java.time.DayOfWeek; import java.time.Duration; import java.time.LocalDateTime; import java.util.concurrent.Executors; import java.util.concurrent.ScheduledExecutorService; import java.util.concurrent.TimeUnit; public class TestSchedule {private static LocalDateTime nowTime; // 如何让每周四 18:00:00 定时执行任务？ public static void main(String[] args) {LocalDateTime nextThursdayTime = getTheTimeOfNextThursday(); // initailDelay 代表当前时间和周四的时间差 // period 一周的间隔时间 long initailDelay = Duration.between(nowTime, nextThursdayTime).toMillis(); long period = 1000 * 60 * 60 * 24 * 7; ScheduledExecutorService pool = Executors.newScheduledThreadPool(1); pool.scheduleAtFixedRate(() -> {System.out.println("running..."); }, initailDelay, period, TimeUnit.MILLISECONDS); }/** * 获取下周周四时间 */ public static LocalDateTime getTheTimeOfNextThursday() {//获取当前时间 nowTime = LocalDateTime.now(); // 获取周四时间 LocalDateTime time = nowTime.withHour(18).withMinute(0).withSecond(0).withNano(0).with(DayOfWeek.THURSDAY); // 如果当前时间 > 本周周四 if (nowTime.compareTo(time) > 0) {// time 加 1周, 为下周周四 time = time.plusWeeks(1); } return time; } }