/**
 * @Description: 1. Timer+TimerTask：（jdk自帶）
 * 這是java自帶的java.util.Timer類，這個類允許你調(diào)度一個java.util.TimerTask任務(wù)。
 * 使用這種方式可以讓你的程序按照某一個頻度執(zhí)行，但不能在指定時間運(yùn)行。一般用的較少。
 * @Author: jianweil
 * @date: 2021/12/14 13:36
 */
public class TimerTest {
    public static void main(String[] args) {
        TimerTask timerTask = new TimerTask() {
            @Override
            public void run() {
                System.out.println("task  run:" + new Date());
            }
        };

        TimerTask timerTask2 = new TimerTask() {
            @Override
            public void run() {
                System.out.println("task2  run:" + new Date());
                //多線程并行處理定時任務(wù)時，Timer運(yùn)行多個TimeTask時，只要其中之一沒有捕獲拋出的異常，其它任務(wù)便會自動終止運(yùn)行，使用ScheduledExecutorService則沒有這個問題。
                int i = 1/0;
            }
        };
        //idea會提示：使用ScheduledExecutorService代替Timer吧
        Timer timer = new Timer();
        System.out.println("begin:" + new Date());
        //安排指定的任務(wù)在指定的時間開始進(jìn)行重復(fù)的固定延遲執(zhí)行。這里是延遲5秒開始執(zhí)行，之后每3秒執(zhí)行一次
        timer.schedule(timerTask, 5000, 3000);
        timer.schedule(timerTask2, 5000, 3000);
    }


}

package com.ljw.springboottimer.scheduledExecutorservice;

import org.apache.commons.lang3.concurrent.BasicThreadFactory;

import java.util.Date;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * @Description: 2. ScheduledExecutorService代替Timer（jdk自帶）
 * 多線程并行處理定時任務(wù)時，Timer運(yùn)行多個TimeTask時，只要其中之一沒有捕獲拋出的異常，其它任務(wù)便會自動終止運(yùn)行，
 * 使用ScheduledExecutorService則沒有這個問題。
 * @Author: jianweil
 * @date: 2021/12/14 13:42
 */
public class ScheduledExecutorServiceTest {
    public static void main(String[] args) throws InterruptedException {

        //當(dāng)所有的非守護(hù)線程結(jié)束時，程序也就終止了，同時會殺死進(jìn)程中的所有守護(hù)線程。反過來說，只要任何非守護(hù)線程還在運(yùn)行，程序就不會終止。
        ScheduledExecutorService executorService = new ScheduledThreadPoolExecutor(1,
                new BasicThreadFactory.Builder().namingPattern("example-schedule-pool-%d").daemon(false).build());
        System.out.println("begin:" + new Date());
        // 參數(shù)：1、任務(wù)體 2、首次執(zhí)行的延時時間 3、任務(wù)執(zhí)行間隔 4、間隔時間單位
        //延遲5秒執(zhí)行，之后每3秒執(zhí)行一次
        executorService.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                //do something
                System.out.println("begin:" + new Date());
            }
        }, 5, 3, TimeUnit.SECONDS);
    }
}

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
</dependency>

@Component
@EnableScheduling
public class SpringTaskTest {
    @Scheduled(cron = "0/5 * * * * *")
    public void run() throws InterruptedException {
        System.out.println(Thread.currentThread().getName() + "=====>>>>>使用cron  {}" + (System.currentTimeMillis() / 1000));
    }
} 

package com.ljw.springboottimer.springtask;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;

/**
 * @Description: 解決單線程串行執(zhí)行 方式2:@Scheduled+配置定時器的線程池
 * @Author: jianweil
 * @date: 2021/12/14 14:44
 */
@Configuration
public class TaskSchedulerConfig {
    /**
     * 初始化了一個線程池大小為 5  的 TaskScheduler, 避免了所有任務(wù)都用一個線程來執(zhí)行
     *
     * @return
     */
    @Bean
    public TaskScheduler taskScheduler() {
        ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
        taskScheduler.setPoolSize(5);
        taskScheduler.setThreadNamePrefix("TaskSchedulerConfig-ljw");
        return taskScheduler;
    }
}

@Component
@EnableScheduling
public class SpringTaskTest {

    @Scheduled(cron = "0/5 * * * * *")
    public void run() throws InterruptedException {
        System.out.println(Thread.currentThread().getName() + "=====>>>>>使用cron  {}" + (System.currentTimeMillis() / 1000));
    }
    
    @Scheduled(fixedRate = 5000)
    public void run1() throws InterruptedException {
        System.out.println(Thread.currentThread().getName() + "=====>>>>>使用fixedRate  {}" + (System.currentTimeMillis() / 1000));
    }

} 

package com.ljw.springboottimer.springtask;

import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @Description: 解決單線程串行執(zhí)行 方式1:@Scheduled+@Async+配置異步線程池
 * @Author: jianweil
 * @date: 2021/12/14 14:35
 */
@Configuration
@EnableAsync
public class AsyncConfig implements AsyncConfigurer {

    /**
     * 定義@Async默認(rèn)的線程池
     * ThreadPoolTaskExecutor不是完全被IOC容器管理的bean,可以在方法上加上@Bean注解交給容器管理,這樣可以將taskExecutor.initialize()方法調(diào)用去掉，容器會自動調(diào)用
     *
     * @return
     */
    @Override
    public Executor getAsyncExecutor() {
        int processors = Runtime.getRuntime().availableProcessors();
        //常用的執(zhí)行器
        ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
        //核心線程數(shù)
        taskExecutor.setCorePoolSize(10);
        taskExecutor.setMaxPoolSize(50);
        //線程隊(duì)列最大線程數(shù),默認(rèn)：50
        taskExecutor.setQueueCapacity(100);
        //線程名稱前綴
        taskExecutor.setThreadNamePrefix("AsyncConfig-ljw-");
        taskExecutor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //執(zhí)行初始化(重要)
        taskExecutor.initialize();
        return taskExecutor;
    }
}

@Component
@EnableScheduling
public class SpringTaskTest {

    @Scheduled(cron = "0/5 * * * * *")
    @Async
    public void run() throws InterruptedException {
        System.out.println(Thread.currentThread().getName() + "=====>>>>>使用cron  {}" + (System.currentTimeMillis() / 1000));
    }
    
    @Scheduled(fixedRate = 5000)
    @Async
    public void run1() throws InterruptedException {
        System.out.println(Thread.currentThread().getName() + "=====>>>>>使用fixedRate  {}" + (System.currentTimeMillis() / 1000));
    }

} 

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-quartz</artifactId>
</dependency>

package com.ljw.springboottimer.quartz.do1;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

import java.util.Date;

/**
 * @Description: 我的定時任務(wù)-方法1
 * @Author: jianweil
 * @date: 2021/12/14 16:06
 */
public class MyTaskService1 implements Job {

    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        System.out.println(Thread.currentThread().getName() + "------ Job ------" + new Date());
    }
}

package com.ljw.springboottimer.quartz.do1;

import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.scheduling.quartz.QuartzJobBean;

import java.util.Date;

/**
 * @Description: 我的定時任務(wù)-方法2
 * @Author: jianweil
 * @date: 2021/12/14 16:06
 */
public class MyTaskService2 extends QuartzJobBean {

    @Override
    protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
        System.out.println(Thread.currentThread().getName() + "---QuartzJobBean-----" + new Date());
    }
}

package com.ljw.springboottimer.quartz.do1;

import org.quartz.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Date;

/**
 * @Description: 每個任務(wù)都要兩步配置
 * 1.配置任務(wù)描述JobDetail 2. 配置觸發(fā)器Trigger
 * @Author: jianweil
 * @date: 2021/12/14 16:08
 */
@Configuration
public class QuartzConfig {

    /**
     * 創(chuàng)建任務(wù)1的 JobDetail1
     *
     * @return
     */
    @Bean
    public JobDetail teatQuartzDetail1() {
        return JobBuilder.newJob(MyTaskService1.class)
                //job的描述
                .withDescription("this is a job1")
                //job 的name和group
                .withIdentity("myTrigger1", "myTriggerGroup1")
                .storeDurably().build();
    }

    /**
     * 創(chuàng)建任務(wù)2的 JobDetail2
     *
     * @return
     */
    @Bean
    public JobDetail teatQuartzDetail2() {
        return JobBuilder.newJob(MyTaskService2.class)
                //job的描述
                .withDescription("this is a job2")
                //job 的name和group
                .withIdentity("myTrigger2", "myTriggerGroup2")
                .storeDurably().build();
    }

    /**
     * 創(chuàng)建任務(wù)1的 Trigger1
     *
     * @return
     */
    @Bean
    public Trigger testQuartzTrigger1() {
        //使用SimpleScheduleBuilder或者CronScheduleBuilder
        SimpleScheduleBuilder scheduleBuilder = SimpleScheduleBuilder.simpleSchedule()
                //設(shè)置時間周期單位秒
                .withIntervalInSeconds(10)
                .repeatForever();

        //兩秒執(zhí)行一次，Quartz表達(dá)式，支持各種牛逼表達(dá)式
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule("0/3 * * * * ?");
        //任務(wù)運(yùn)行的時間，SimpleSchedle類型觸發(fā)器有效，3秒后啟動任務(wù)
        long time = System.currentTimeMillis() + 3 * 1000L;
        Date statTime = new Date(time);


        return TriggerBuilder.newTrigger()
                .withDescription("")
                .forJob(teatQuartzDetail1())
                .withIdentity("myTrigger1", "myTriggerGroup1")
                //默認(rèn)當(dāng)前時間啟動
                .startAt(statTime)
                .withSchedule(cronScheduleBuilder)
                //.withSchedule(scheduleBuilder)
                .build();

    }

    /**
     * 創(chuàng)建任務(wù)2的 Trigger2
     *
     * @return
     */
    @Bean
    public Trigger testQuartzTrigger2() {
        SimpleScheduleBuilder scheduleBuilder = SimpleScheduleBuilder.simpleSchedule()
                //設(shè)置時間周期單位秒
                .withIntervalInSeconds(10)
                .repeatForever();
        return TriggerBuilder.newTrigger()
                .forJob(teatQuartzDetail2())
                .withIdentity("myTrigger2", "myTriggerGroup2")
                .withSchedule(scheduleBuilder)
                .build();
    }

}