基于Springboot的运行时动态可调的定时任务

配置类

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;@Configuration
public class TaskSchedulerConfig {@Bean(destroyMethod = "shutdown")public ThreadPoolTaskScheduler taskScheduler() {ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();scheduler.setPoolSize(自定义池大小，可以通过配置指定大小);scheduler.initialize();return scheduler;}
}

创建和删除定时任务的接口示例

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;import java.time.LocalDateTime;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ScheduledFuture;@Slf4j
@RestController
@RequestMapping("/task")
public class InnerCommonController {@GetMapping("/c")public ResponseEntity<?> create(@RequestParam("cron") String cron,@RequestParam("taskId") String taskId) {Runnable task = () -> {System.out.println("Executing task: " + taskId + LocalDateTime.now());// 执行任务的具体逻辑};CronTrigger trigger = new CronTrigger(cron);ScheduledFuture<?> future = taskScheduler.schedule(task, trigger);scheduledTasks.put(taskId, future);return ResponseEntity.ok().build();}@GetMapping("/d")public ResponseEntity<?> delete(@RequestParam("taskId") String taskId) {ScheduledFuture<?> future = scheduledTasks.remove(taskId);if (future != null) {future.cancel(false); // 取消任务return ResponseEntity.ok().build();} else {return ResponseEntity.notFound().build();}}
}

调用示例
新增，cron表达式encode了，3秒一次
http://127.0.0.1:8080/demo/task/c?cron=0/3%20*%20*%20*%20*%20?%20&taskId=2024
删除
http://127.0.0.1:8080/demo/task/task/d?taskId=2024

创建后日志打印结果

Executing task: 20242024-08-05T13:50:03.013
Executing task: 20242024-08-05T13:50:06.014
Executing task: 20242024-08-05T13:50:09.003
Executing task: 20242024-08-05T13:50:12.011
Executing task: 20242024-08-05T13:50:15.012
Executing task: 20242024-08-05T13:50:18.007