在上一节中，我们介绍了SpringBoot中关于定时任务的执行方式，以及ScheduledExecutorService接口提供的定时任务执行方法。假设我们现在要写类似XXL-JOB这样的任务调度平台，那么，对于任务的管理，是尤为重要的。接下来我们将一步一步，实现一个任务调度管理类。

YangJobManager类基础实现

假设我们现在的任务管理类，名为YangJobManager类。对于定时任务的执行，我们最终会调用到ScheduledExecutorService的相关方法，因此，我们的YangJobManager类，需要有ScheduledExecutorService属性，其次，我们希望能对要执行的定时线程任务，其命名进行修改，因此，我们需要有一个线程工厂的属性。基于上述两点，我们对YangJobManager类进行实现：

package com.yang.job;import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;public class YangJobManager {private ScheduledExecutorService scheduledExecutorService;private ThreadFactory threadFactory;public YangJobManager(ScheduledExecutorService scheduledExecutorService, ThreadFactory threadFactory) {this.scheduledExecutorService = scheduledExecutorService;this.threadFactory = threadFactory;}public void schedule(Runnable runnable, Long delay) {Thread thread = threadFactory.newThread(runnable);scheduledExecutorService.schedule(thread, delay, TimeUnit.SECONDS);}public void scheduleWithFixedDelay(Runnable runnable, Long delay, Long period) {Thread thread = threadFactory.newThread(runnable);scheduledExecutorService.scheduleWithFixedDelay(thread, delay, period, TimeUnit.SECONDS);}public void scheduleWithFixedRate(Runnable runnable, Long delay, Long period) {Thread thread = threadFactory.newThread(runnable);scheduledExecutorService.scheduleAtFixedRate(thread, delay, period, TimeUnit.SECONDS);}public void shutdown() {if (this.scheduledExecutorService == null) {return;}if (this.scheduledExecutorService.isShutdown()) {return;}scheduledExecutorService.shutdown();try {if (!scheduledExecutorService.awaitTermination(10, TimeUnit.SECONDS)) {scheduledExecutorService.shutdownNow();}} catch (InterruptedException e) {e.printStackTrace();}}
}

然后，我们实现YangJobThreadFactory，完成对线程的命名

public class YangJobThreadFactory implements ThreadFactory {private String poolName;private String threadPrefixName;private static AtomicInteger poolNumber = new AtomicInteger(1);private AtomicInteger threadNumber = new AtomicInteger(1);public YangJobThreadFactory(String poolName) {this.poolName = poolName;this.threadPrefixName = poolName + "-pool-" + poolNumber.getAndIncrement() + "-thread-";}public String getPoolName() {return this.poolName;}@Overridepublic Thread newThread(Runnable r) {Thread thread = new Thread(r);thread.setName(this.threadPrefixName + threadNumber.getAndIncrement());return thread;}}

然后我们添加测试方法：

 public static void main(String[] args) {ThreadFactory threadFactory = new YangJobThreadFactory("yang");ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(4, threadFactory);YangJobManager yangJobManager = new YangJobManager(scheduledExecutorService, threadFactory);yangJobManager.schedule(() -> {System.out.println(Thread.currentThread().getName() + "schedule定时任务开始执行：" + new Date());}, 1L);yangJobManager.scheduleWithFixedDelay(() -> {System.out.println(Thread.currentThread().getName() + "withFixedDelay定时任务开始执行：" + new Date());}, 0L, 1L);yangJobManager.scheduleWithFixedRate(() -> {System.out.println(Thread.currentThread().getName() + "withFixedRate定时任务开始执行：" + new Date());}, 0L, 1L);try {Thread.sleep(20000);} catch (InterruptedException e) {throw new RuntimeException(e);}yangJobManager.shutdown();}

执行结果如下：

提供统一的schedule方法

虽然我们能顺利将任务提交给YangJobManager执行，当感觉还不够收敛，因为我们创建了三个方法：schedule，scheduleWithFixedDelay, shceduleWithFixedRate，每个方法执行逻辑都差不多，最后都是调用scheduledExecutorService的相关方法，我们可以将这些方法都收敛到一个入口——schedule，然后在入参中添加一个参数，表示要执行的策略，根据入参的参数，选择对应的方法执行。
首先，我们添加一个执行策略枚举：

package com.yang.job.enums;public enum JobExecuteStrategyEnum {IMMEDIATE_EXECUTE("immediate", "立即执行"),ONCE("once", "执行一次"),WITH_FIXED_DELAY("withFixedDelay", "任务执行完毕后间隔执行"),WITH_FIXED_RATE("withFixedRate", "任务执行开始后间隔执行");private String name;private String description;JobExecuteStrategyEnum(String name, String description) {this.name = name;this.description = description;}public String getName() {return this.name;}public static JobExecuteStrategyEnum getJobExecuteStrategyByName(String name) {if (name == null) {return null;}for (JobExecuteStrategyEnum value : values()) {if (name.equals(value.getName())) {return value;}}return null;}public static boolean isLegal(String name) {JobExecuteStrategyEnum jobExecuteStrategyByName = getJobExecuteStrategyByName(name);return jobExecuteStrategyByName != null;}public String getDescription() {return description;}
}

然后添加YangJobManager的schedule方法的入参类：

package com.yang.job.request;import com.yang.job.enums.JobExecuteStrategyEnum;
import lombok.Data;import java.io.Serializable;@Data
public class YangJobSubmitParam implements Serializable {private Runnable runnable;private Integer initialDelay;private Integer period;private JobExecuteStrategyEnum jobExecuteStrategy;
}

最后，修改YangJobManager类，将执行定时任务收敛到schedule方法，进入该方法，首先根据入参判断执行策略，如果是immediate，那么直接对入参的runnable调用run方法执行接口，其他的策略则分别对应scheduledExecutorService的schedule、scheduledWithFixedDelay、scheduledWithFixedRate方法，此外，这里对属性也进行修改，去除ThreadFactory属性。

package com.yang.job;import com.yang.job.enums.JobExecuteStrategyEnum;
import com.yang.job.request.YangJobSubmitParam;import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;public class YangJobManager {private ScheduledExecutorService scheduledExecutorService;public YangJobManager(ScheduledExecutorService scheduledExecutorService) {this.scheduledExecutorService = scheduledExecutorService;}public void schedule(YangJobSubmitParam yangJobSubmitParam) {JobExecuteStrategyEnum jobExecuteStrategy = yangJobSubmitParam.getJobExecuteStrategy();if (jobExecuteStrategy == null) {throw new RuntimeException("缺少执行策略=========");}Runnable runnable = yangJobSubmitParam.getRunnable();Integer initialDelay = yangJobSubmitParam.getInitialDelay();Integer period = yangJobSubmitParam.getPeriod();switch (jobExecuteStrategy) {case IMMEDIATE_EXECUTE:runnable.run();break;case ONCE:scheduledExecutorService.schedule(runnable, initialDelay, TimeUnit.SECONDS);break;case WITH_FIXED_DELAY:scheduledExecutorService.scheduleWithFixedDelay(runnable, initialDelay, period, TimeUnit.SECONDS);break;case WITH_FIXED_RATE:scheduledExecutorService.scheduleAtFixedRate(runnable, initialDelay, period, TimeUnit.SECONDS);break;}}public void shutdown() {if (this.scheduledExecutorService == null) {return;}if (this.scheduledExecutorService.isShutdown()) {return;}scheduledExecutorService.shutdown();try {if (!scheduledExecutorService.awaitTermination(10, TimeUnit.SECONDS)) {scheduledExecutorService.shutdownNow();}} catch (InterruptedException e) {e.printStackTrace();}}
}

最后，我们添加测试方法：

public static void main(String[] args) {ThreadFactory threadFactory = new YangJobThreadFactory("yang");ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(4, threadFactory);YangJobManager yangJobManager = new YangJobManager(scheduledExecutorService);YangJobSubmitParam yangJobSubmitParam1 = new YangJobSubmitParam();yangJobSubmitParam1.setRunnable(() -> System.out.println("立即执行======" + new Date()));yangJobSubmitParam1.setJobExecuteStrategy(JobExecuteStrategyEnum.IMMEDIATE_EXECUTE);YangJobSubmitParam yangJobSubmitParam2 = new YangJobSubmitParam();yangJobSubmitParam2.setRunnable(() -> System.out.println("执行一次======" + new Date()));yangJobSubmitParam2.setInitialDelay(1);yangJobSubmitParam2.setJobExecuteStrategy(JobExecuteStrategyEnum.ONCE);YangJobSubmitParam yangJobSubmitParam3 = new YangJobSubmitParam();yangJobSubmitParam3.setRunnable(() -> System.out.println("withFixedDelay=====" + new Date()));yangJobSubmitParam3.setInitialDelay(1);yangJobSubmitParam3.setPeriod(2);yangJobSubmitParam3.setJobExecuteStrategy(JobExecuteStrategyEnum.WITH_FIXED_DELAY);YangJobSubmitParam yangJobSubmitParam4 = new YangJobSubmitParam();yangJobSubmitParam4.setRunnable(() -> System.out.println("withFixedRate=====" + new Date()));yangJobSubmitParam4.setInitialDelay(1);yangJobSubmitParam4.setPeriod(2);yangJobSubmitParam4.setJobExecuteStrategy(JobExecuteStrategyEnum.WITH_FIXED_RATE);yangJobManager.schedule(yangJobSubmitParam1);yangJobManager.schedule(yangJobSubmitParam2);yangJobManager.schedule(yangJobSubmitParam3);yangJobManager.schedule(yangJobSubmitParam4);try {Thread.sleep(20000);} catch (InterruptedException e) {throw new RuntimeException(e);}yangJobManager.shutdown();}

执行结果如下：

提交任务和取消任务

任务的提交对应的是schedule方法，但我们的YangJobManager类缺少了关于任务的取消逻辑。在ScheduledExecutorService的各个定时执行方法中，其返回值是一个ScheduleFuture类，我们可以通过该类的cancel方法，来将对应的线程任务进行取消。此外，对于每一个任务，我们需要有一个任务标识，所以，我们先修改YangJobSubmitParam类：

package com.yang.job.request;import com.yang.job.enums.JobExecuteStrategyEnum;
import lombok.Data;import java.io.Serializable;@Data
public class YangJobSubmitParam implements Serializable {private Integer jobId;private Runnable runnable;private Integer initialDelay;private Integer period;private JobExecuteStrategyEnum jobExecuteStrategy;
}

然后，我们修改YangJobManager类，首先将schedule方法改为submit方法，这样更见名知义，在submit方法中，除了理解执行策略外，其他策略都会获取返回的ScheduleFuture，然后存入对应的map，在取消的时候，我们根据jobId从map中找到对应的ScheduleFuture，并执行cancel方法，以此来取消任务。

package com.yang.job;import com.yang.job.enums.JobExecuteStrategyEnum;
import com.yang.job.request.YangJobSubmitParam;import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;public class YangJobManager {private ScheduledExecutorService scheduledExecutorService;private Map<String, ScheduledFuture> jobId2ScheduleFutureMap = new ConcurrentHashMap<>();public YangJobManager(ScheduledExecutorService scheduledExecutorService) {this.scheduledExecutorService = scheduledExecutorService;}public void submitJob(YangJobSubmitParam yangJobSubmitParam) {Integer jobId = yangJobSubmitParam.getJobId();if (jobId == null) {throw new RuntimeException("缺少任务标识=========");}ScheduledFuture scheduledFuture = jobId2ScheduleFutureMap.get(jobId.toString());if (scheduledFuture != null && !scheduledFuture.isCancelled()) {// jobId存在对应的任务return;}JobExecuteStrategyEnum jobExecuteStrategy = yangJobSubmitParam.getJobExecuteStrategy();if (jobExecuteStrategy == null) {throw new RuntimeException("缺少执行策略=========");}if (jobExecuteStrategy == JobExecuteStrategyEnum.IMMEDIATE_EXECUTE) {yangJobSubmitParam.getRunnable().run();return;}scheduledFuture = scheduleJob(yangJobSubmitParam);jobId2ScheduleFutureMap.put(jobId.toString(), scheduledFuture);}public void cancelJob(Integer jobId) {if (jobId == null) {return;}ScheduledFuture scheduledFuture = jobId2ScheduleFutureMap.get(jobId.toString());if (scheduledFuture == null) {return;}if (!scheduledFuture.isCancelled()) {scheduledFuture.cancel(true);}jobId2ScheduleFutureMap.remove(jobId.toString());}private ScheduledFuture scheduleJob(YangJobSubmitParam yangJobSubmitParam) {Runnable runnable = yangJobSubmitParam.getRunnable();Integer initialDelay = yangJobSubmitParam.getInitialDelay();Integer period = yangJobSubmitParam.getPeriod();JobExecuteStrategyEnum jobExecuteStrategy = yangJobSubmitParam.getJobExecuteStrategy();switch (jobExecuteStrategy) {case ONCE:return scheduledExecutorService.schedule(runnable, initialDelay, TimeUnit.SECONDS);case WITH_FIXED_DELAY:return scheduledExecutorService.scheduleWithFixedDelay(runnable, initialDelay, period, TimeUnit.SECONDS);case WITH_FIXED_RATE:return scheduledExecutorService.scheduleAtFixedRate(runnable, initialDelay, period, TimeUnit.SECONDS);}throw new RuntimeException("执行策略有误===========");}public void shutdown() {if (this.scheduledExecutorService == null) {return;}if (this.scheduledExecutorService.isShutdown()) {return;}scheduledExecutorService.shutdown();try {if (!scheduledExecutorService.awaitTermination(10, TimeUnit.SECONDS)) {scheduledExecutorService.shutdownNow();}} catch (InterruptedException e) {e.printStackTrace();}}
}

最后，我们添加对应的测试方法：

 public static void main(String[] args) {ThreadFactory threadFactory = new YangJobThreadFactory("yang");ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(4, threadFactory);YangJobManager yangJobManager = new YangJobManager(scheduledExecutorService);YangJobSubmitParam yangJobSubmitParam = new YangJobSubmitParam();yangJobSubmitParam.setJobId(1);yangJobSubmitParam.setRunnable(() -> System.out.println("执行任务=====" + new Date()));yangJobSubmitParam.setInitialDelay(0);yangJobSubmitParam.setPeriod(2);yangJobSubmitParam.setJobExecuteStrategy(JobExecuteStrategyEnum.WITH_FIXED_RATE);yangJobManager.submitJob(yangJobSubmitParam);try {Thread.sleep(10000);} catch (InterruptedException e) {e.printStackTrace();}System.out.println("取消任务==========");yangJobManager.cancelJob(1);try {Thread.sleep(10000);} catch (InterruptedException e) {e.printStackTrace();}yangJobManager.shutdown();}

在该方法中，我们提交任务，该任务间隔时间为2秒，10秒过后，取消任务，取消任务过后，再睡眠10秒，在后面10秒钟，不会执行任务（或执行一次，因为在cancel之前刚好有任务没执行完），执行结果如下：

YangJobManager建造者

对于YangJobManager，目前我们所拥有的属性、方法都比较简单，但是如果后续这个类进一步扩展，构造该类可能会变得很麻烦，因此，我们添加一个YangJobBuilder建造者类，用于构造YangJobManager，此外，我们将YangJobManager的构造方法设置为private，从而将构造YangJobManager的职责，彻底收敛到YangJobManagerBuilder类中，我们修改YangJobManager类如下：

package com.yang.job;import com.yang.job.enums.JobExecuteStrategyEnum;
import com.yang.job.factory.YangJobThreadFactory;
import com.yang.job.request.YangJobSubmitParam;import java.util.Map;
import java.util.concurrent.*;public class YangJobManager {private ScheduledExecutorService scheduledExecutorService;private Map<String, ScheduledFuture> jobId2ScheduleFutureMap = new ConcurrentHashMap<>();private YangJobManager(ScheduledExecutorService scheduledExecutorService) {this.scheduledExecutorService = scheduledExecutorService;}public void submitJob(YangJobSubmitParam yangJobSubmitParam) {Integer jobId = yangJobSubmitParam.getJobId();if (jobId == null) {throw new RuntimeException("缺少任务标识=========");}ScheduledFuture scheduledFuture = jobId2ScheduleFutureMap.get(jobId.toString());if (scheduledFuture != null && !scheduledFuture.isCancelled()) {// jobId存在对应的任务return;}JobExecuteStrategyEnum jobExecuteStrategy = yangJobSubmitParam.getJobExecuteStrategy();if (jobExecuteStrategy == null) {throw new RuntimeException("缺少执行策略=========");}if (jobExecuteStrategy == JobExecuteStrategyEnum.IMMEDIATE_EXECUTE) {yangJobSubmitParam.getRunnable().run();return;}scheduledFuture = scheduleJob(yangJobSubmitParam);jobId2ScheduleFutureMap.put(jobId.toString(), scheduledFuture);}public void cancelJob(Integer jobId) {if (jobId == null) {return;}ScheduledFuture scheduledFuture = jobId2ScheduleFutureMap.get(jobId.toString());if (scheduledFuture == null) {return;}if (!scheduledFuture.isCancelled()) {scheduledFuture.cancel(true);}jobId2ScheduleFutureMap.remove(jobId.toString());}private ScheduledFuture scheduleJob(YangJobSubmitParam yangJobSubmitParam) {Runnable runnable = yangJobSubmitParam.getRunnable();Integer initialDelay = yangJobSubmitParam.getInitialDelay();Integer period = yangJobSubmitParam.getPeriod();JobExecuteStrategyEnum jobExecuteStrategy = yangJobSubmitParam.getJobExecuteStrategy();switch (jobExecuteStrategy) {case ONCE:return scheduledExecutorService.schedule(runnable, initialDelay, TimeUnit.SECONDS);case WITH_FIXED_DELAY:return scheduledExecutorService.scheduleWithFixedDelay(runnable, initialDelay, period, TimeUnit.SECONDS);case WITH_FIXED_RATE:return scheduledExecutorService.scheduleAtFixedRate(runnable, initialDelay, period, TimeUnit.SECONDS);}throw new RuntimeException("执行策略有误===========");}public void shutdown() {if (this.scheduledExecutorService == null) {return;}if (this.scheduledExecutorService.isShutdown()) {return;}scheduledExecutorService.shutdown();try {if (!scheduledExecutorService.awaitTermination(10, TimeUnit.SECONDS)) {scheduledExecutorService.shutdownNow();}} catch (InterruptedException e) {e.printStackTrace();}}public static class YangJobManagerBuilder {private ThreadFactory threadFactory;private ScheduledExecutorService scheduledExecutorService;public YangJobManagerBuilder() {}public YangJobManagerBuilder setThreadFactory(ThreadFactory threadFactory) {this.threadFactory = threadFactory;return this;}public YangJobManagerBuilder setScheduledExecutorService(ScheduledExecutorService scheduledExecutorService) {this.scheduledExecutorService = scheduledExecutorService;return this;}public YangJobManager build() {if (this.threadFactory == null) {this.threadFactory = new YangJobThreadFactory("yang");}if (this.scheduledExecutorService == null) {this.scheduledExecutorService = Executors.newScheduledThreadPool(Runtime.getRuntime().availableProcessors(),this.threadFactory);} else {if (this.scheduledExecutorService instanceof ScheduledThreadPoolExecutor) {ScheduledThreadPoolExecutor scheduledThreadPoolExecutor = (ScheduledThreadPoolExecutor) this.scheduledExecutorService;scheduledThreadPoolExecutor.setThreadFactory(this.threadFactory);}}return new YangJobManager(this.scheduledExecutorService);}}
}

任务执行类

在之前的代码中，我们的Runnable都是匿名函数类，但是在我们的定时任务调度平台中，一般情况下，这个任务是会持久化到数据库中的，我们一般不会说把这个Runnable的代码也存到数据库吧，一般存储的，应该就是某个任务执行类的类路径，和方法名，以及入参，然后在启动项目时，从数据库中加载这些数据，并通过反射或代理等方式，来构造这个Runnable。
首先，我们定义一个任务执行类，来规范任务的执行方法和入参格式：

// 任务执行类
package com.yang.job.execute;public interface IYangJobExecutor {void execute(YangJobExecuteRequest yangJobExecuteRequest);
}// 任务执行方法入参
package com.yang.job.execute;import lombok.Data;import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;@Data
public class YangJobExecuteRequest implements Serializable {private String jobId;private Map<String, String> params = new HashMap<>();public void addParam(String key, String value) {params.put(key, value);}public String getParam(String key) {return params.get(key);}
}

接着，我们创建这个YangJobExecutor的实现类，用于测试，在该类中，执行任务的方法很简单，打印当前类的名字以及入参。

package com.yang.task;import com.yang.job.execute.IYangJobExecutor;
import com.yang.job.execute.YangJobExecuteRequest;import java.util.Date;public class TestJobExecutor implements IYangJobExecutor {@Overridepublic void execute(YangJobExecuteRequest yangJobExecuteRequest) {System.out.println(String.format("%s 任务执行类执行了，入参为：%s, 当前时间:%s",this.getClass().getName(), yangJobExecuteRequest.toString(),new Date().toString()));}
}

然后我们创建一个YangJobData，假设我们从数据库中获取的数据格式如下：

package com.yang.job.data;import lombok.Data;import java.io.Serializable;@Data
public class YangJobData implements Serializable {private Integer jobId;private String cron;private String executeStrategy;private String executeClassPath;private String executeParams;
}

executeStrategy表示任务的执行策略，executeClassPath表示要执行的任务类的路径，executeParams表示执行任务方法的入参。
在XXL-JOB中，我们可以使用cron来设置定时任务的执行时间，因此我们这里，也使用cron作为定时任务的执行时间设置，为了解析cron表达式，我们添加下列依赖：

  <dependency><groupId>com.cronutils</groupId><artifactId>cron-utils</artifactId><version>9.2.0</version></dependency>

然后创建一个CronUtils工具类，用于解析cron表达式。

package com.yang.demo.infra.utils;import com.cronutils.model.CronType;
import com.cronutils.model.definition.CronDefinition;
import com.cronutils.model.definition.CronDefinitionBuilder;
import com.cronutils.model.time.ExecutionTime;
import com.cronutils.parser.CronParser;import java.time.ZonedDateTime;
import java.util.Optional;public class CronUtils {private static final CronDefinition CRON_DEFINITION = CronDefinitionBuilder.instanceDefinitionFor(CronType.QUARTZ);private static final CronParser CRON_PARSER = new CronParser(CRON_DEFINITION);public static ZonedDateTime nextExecutionTime(String cron, ZonedDateTime startTime) {ExecutionTime executionTime = ExecutionTime.forCron(CRON_PARSER.parse(cron));Optional<ZonedDateTime> zonedDateTime = executionTime.nextExecution(startTime);return zonedDateTime.get();}
}

对于执行方法的入参，一般情况下，就是任务的id，以及一些扩展信息，这些扩展信息一般以键值对的形式存储，即"key:value;key:value;"这些形式，所以这里添加一个FeaturesUtils类，用于解析这些键值对信息：

package com.yang.job.utils;import java.util.HashMap;
import java.util.Map;public class FeaturesUtils {private final static String KEY_KEY_SEPARATOR = ";";private final static String KEY_VALUE_SEPARATOR = ":";public static Map<String, String> convert2FeatureMap(String features) {Map<String, String> featureMap = new HashMap<>();if (features == null || features.isEmpty()) {return featureMap;}String[] keyValues = features.split(KEY_KEY_SEPARATOR);for (String keyValue : keyValues) {String[] split = keyValue.split(KEY_VALUE_SEPARATOR);String key = split[0];String value = split[1];featureMap.put(key, value);}return featureMap;}public static String convert2Features(Map<String, String> featureMap) {if (featureMap == null || featureMap.isEmpty()) {return "";}StringBuilder stringBuilder = new StringBuilder();featureMap.forEach((key, value) -> {stringBuilder.append(key).append(KEY_VALUE_SEPARATOR).append(value).append(KEY_KEY_SEPARATOR);});return stringBuilder.toString();}
}

然后我们添加测试方法，模拟从数据库中获取数据，并根据任务类路径，获取对应的runnable并提交到YangJobManager中。

  public static void main(String[] args) {YangJobData yangJobData = mockYangJobData();YangJobSubmitParam yangJobSubmitParam = convert2YangJobSubmitParam(yangJobData);YangJobManager yangJobManager = new YangJobManager.YangJobManagerBuilder().setThreadFactory(new YangJobThreadFactory("yang")).build();yangJobManager.submitJob(yangJobSubmitParam);try {Thread.sleep(20000);} catch (InterruptedException e) {throw new RuntimeException(e);}yangJobManager.shutdown();}private static YangJobSubmitParam convert2YangJobSubmitParam(YangJobData yangJobData) {YangJobSubmitParam yangJobSubmitParam = new YangJobSubmitParam();yangJobSubmitParam.setJobId(yangJobData.getJobId());yangJobSubmitParam.setJobExecuteStrategy(JobExecuteStrategyEnum.getJobExecuteStrategyByName(yangJobData.getExecuteStrategy()));ZonedDateTime nextExecutionTime = CronUtils.nextExecutionTime(yangJobData.getCron(), ZonedDateTime.now());ZonedDateTime nextNextExecutionTime = CronUtils.nextExecutionTime(yangJobData.getCron(), nextExecutionTime);long nowEochMill = ZonedDateTime.now().toInstant().toEpochMilli();long executeEochMill = nextExecutionTime.toInstant().toEpochMilli();long secondExecuteEochMill = nextNextExecutionTime.toInstant().toEpochMilli();yangJobSubmitParam.setInitialDelay((int)(executeEochMill - nowEochMill) / 1000);yangJobSubmitParam.setPeriod((int)(secondExecuteEochMill - executeEochMill) / 1000);try {Class<?> aClass = Class.forName(yangJobData.getExecuteClassPath());if (!IYangJobExecutor.class.isAssignableFrom(aClass)) {throw new RuntimeException("任务类必须实现IYangJobExecutor接口");}IYangJobExecutor executor = (IYangJobExecutor) aClass.newInstance();YangJobExecuteRequest yangJobExecuteRequest = convert2YangJobExecuteRequest(yangJobData);Runnable runnable = () -> executor.execute(yangJobExecuteRequest);yangJobSubmitParam.setRunnable(runnable);} catch (InstantiationException | IllegalAccessException e) {e.printStackTrace();} catch (ClassNotFoundException e) {e.printStackTrace();}return yangJobSubmitParam;}private static YangJobExecuteRequest convert2YangJobExecuteRequest(YangJobData yangJobData) {YangJobExecuteRequest yangJobExecuteRequest = new YangJobExecuteRequest();yangJobExecuteRequest.setJobId(yangJobData.getJobId().toString());yangJobExecuteRequest.setParams(FeaturesUtils.convert2FeatureMap(yangJobData.getExecuteParams()));return yangJobExecuteRequest;}private static YangJobData mockYangJobData() {YangJobData yangJobData = new YangJobData();yangJobData.setJobId(1);yangJobData.setCron("0/5 * * * * ?");yangJobData.setExecuteStrategy(JobExecuteStrategyEnum.WITH_FIXED_DELAY.getName());yangJobData.setExecuteClassPath("com.yang.task.TestJobExecutor");yangJobData.setExecuteParams("jobId:1;startIndex:1;endIndex:10;");return yangJobData;}

这里对于cron的解析，其实不是特别好，这里的思路是，获取下一次执行的时间，和下下一次执行的时间，然后以此来计算initialDelay和period，但是如果这个cron表示的是某几天、某几个小时，比如说星期一、星期二、星期三执行，那么我们那种解析方式是有误的，这个可以后续再好好斟酌一下，目前先这样解析。
执行结果如下：