本文定时任务功能(增、删、改、启动、暂停) 话不多说,直接上代码,你们直接CV就可以用!!! 执行定时任务的线程池配置类 import org.springframework.context.annotation.Bean;im
本文定时任务功能(增、删、改、启动、暂停) 话不多说,直接上代码,你们直接CV就可以用!!!
import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.scheduling.TaskScheduler;import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;@Configurationpublic class SchedulinGConfig { @Bean public TaskScheduler taskScheduler() { ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler(); // 定时任务执行线程池核心线程数 taskScheduler.setPoolSize(6); taskScheduler.setRemoveOnCancelPolicy(true); taskScheduler.setThreadNamePrefix("TaskSchedulerThreadPool-"); return taskScheduler; } }
ScheduledFuture是ScheduledExecutorService定时任务线程池的执行结果。
import java.util.concurrent.ScheduledFuture;public final class ScheduledTask { volatile ScheduledFuture> future; public void cancel() { ScheduledFuture> future = this.future; if (future != null) { future.cancel(true); } } }
被定时任务线程池调用,用来执行指定bean里面的方法。
import com.ying.demo.utils.springContextUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.util.ReflectionUtils;import org.springframework.util.StringUtils;import java.lang.reflect.Method;import java.util.Objects;public class SchedulingRunnable implements Runnable { private static final Logger logger = LoggerFactory.getLogger(SchedulingRunnable.class); private String beanName; private String methodName; private String params; public SchedulingRunnable(String beanName, String methodName) { this(beanName, methodName, null); } public SchedulingRunnable(String beanName, String methodName, String params) { this.beanName = beanName; this.methodName = methodName; this.params = params; } @Override public void run() { logger.info("定时任务开始执行 - bean:{},方法:{},参数:{}", beanName, methodName, params); long startTime = System.currentTimeMillis(); try { Object target = springContextUtils.getBean(beanName); Method method = null; if (!StringUtils.isEmpty(params)) { method = target.getClass().getDeclaredMethod(methodName, String.class); } else { method = target.getClass().getDeclaredMethod(methodName); } ReflectionUtils.makeAccessible(method); if (!StringUtils.isEmpty(params)) { method.invoke(target, params); } else { method.invoke(target); } } catch (Exception ex) { logger.error(String.fORMat("定时任务执行异常 - bean:%s,方法:%s,参数:%s ", beanName, methodName, params), ex); } long times = System.currentTimeMillis() - startTime; logger.info("定时任务执行结束 - bean:{},方法:{},参数:{},耗时:{} 毫秒", beanName, methodName, params, times); } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; SchedulingRunnable that = (SchedulingRunnable) o; if (params == null) { return beanName.equals(that.beanName) && methodName.equals(that.methodName) && that.params == null; } return beanName.equals(that.beanName) && methodName.equals(that.methodName) && params.equals(that.params); } @Override public int hashCode() { if (params == null) { return Objects.hash(beanName, methodName); } return Objects.hash(beanName, methodName, params); }}
用来增加、删除定时任务
@Componentpublic class CronTaskReGIStrar implements DisposableBean { private final Map scheduledTasks = new ConcurrentHashMap<>(16); @Autowired private TaskScheduler taskScheduler; public TaskScheduler getScheduler() { return this.taskScheduler; } public void addCronTask(Runnable task, String cronExpression) { addCronTask(new CronTask(task, cronExpression)); } public void addCronTask(CronTask cronTask) { if (cronTask != null) { Runnable task = cronTask.getRunnable(); if (this.scheduledTasks.containsKey(task)) { removeCronTask(task); } this.scheduledTasks.put(task, scheduleCronTask(cronTask)); } } public void removeCronTask(Runnable task) { ScheduledTask scheduledTask = this.scheduledTasks.remove(task); if (scheduledTask != null) scheduledTask.cancel(); } public ScheduledTask scheduleCronTask(CronTask cronTask) { ScheduledTask scheduledTask = new ScheduledTask(); scheduledTask.future = this.taskScheduler.schedule(cronTask.getRunnable(), cronTask.getTrigger()); return scheduledTask; } @Override public void destroy() { for (ScheduledTask task : this.scheduledTasks.values()) { task.cancel(); } this.scheduledTasks.clear(); }}
@Slf4j@Component("taskDemo")public class Task1 { public void taskByParams(String params) { log.info("taskByParams执行时间:{}", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())); log.info("taskByParams执行有参示例任务:{}",params); } public void taskNoParams() { log.info("taskByParams执行时间:{}", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())); log.info("taskNoParams执行无参示例任务"); } public void test(String params) { log.info("test执行时间:{}", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())); log.info("test执行有参示例任务:{}",params); }}
CREATE TABLE `schedule_setting` ( `job_id` int NOT NULL AUTO_INCREMENT COMMENT '任务ID', `bean_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT 'bean名称', `method_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '方法名称', `method_params` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '方法参数', `cron_expression` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT 'cron表达式', `remark` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '备注', `job_status` int DEFAULT NULL COMMENT '状态(1正常 0暂停)', `create_time` datetime DEFAULT NULL COMMENT '创建时间', `update_time` datetime DEFAULT NULL COMMENT '修改时间', PRIMARY KEY (`job_id`)) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
@Datapublic class ScheduleSetting extends Model { @Id private Integer jobId; private String beanName; private String methodName; private String methodParams; private String cronExpression; private Integer jobStatus; private String remark; private Date createTime; private Date updateTime;}
Spring Boot项目启动完成后,加载数据库里状态为正常的定时任务
@Service public class SysJobRunner implements CommandLineRunner { private static final Logger logger = LoggerFactory.getLogger(SysJobRunner.class); @Autowired private CronTaskRegistrar cronTaskRegistrar; @Override public void run(String... args) { // 初始加载数据库里状态为正常的定时任务 ScheduleSetting existedSysJob = new ScheduleSetting(); List jobList = existedSysJob.selectList(new QueryWrapper().eq("job_status", 1)); if (CollectionUtils.isNotEmpty(jobList)) { for (ScheduleSetting job : jobList) { SchedulingRunnable task = new SchedulingRunnable(job.getBeanName(), job.getMethodName(), job.getMethodParams()); cronTaskRegistrar.addCronTask(task, job.getCronExpression()); } logger.info("定时任务已加载完毕..."); } } }
用来从spring容器里获取bean
@Component public class SpringContextUtils implements ApplicationContextAware { private static ApplicationContext applicationContext; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { SpringContextUtils.applicationContext = applicationContext; } public static Object getBean(String name) { return applicationContext.getBean(name); } public static T getBean(Class requiredType) { return applicationContext.getBean(requiredType); } public static T getBean(String name, Class requiredType) { return applicationContext.getBean(name, requiredType); } public static boolean containsBean(String name) { return applicationContext.containsBean(name); } public static boolean isSingleton(String name) { return applicationContext.isSingleton(name); } public static Class extends Object> getType(String name) { return applicationContext.getType(name); } }
@RestControllerpublic class TestController { @Autowired private CronTaskRegistrar cronTaskRegistrar; @PostMapping("add") public boolean add(@RequestBody ScheduleSetting sysJob) { sysJob.setCreateTime(new Date()); sysJob.setUpdateTime(new Date()); boolean insert = sysJob.insert(); if (!insert) { return false; }else { if (sysJob.getJobStatus().equals(1)) {// 添加成功,并且状态是1,直接放入任务器 SchedulingRunnable task = new SchedulingRunnable(sysJob.getBeanName(), sysJob.getMethodName(), sysJob.getMethodParams()); cronTaskRegistrar.addCronTask(task, sysJob.getCronExpression()); } } return insert; } @PostMapping("update") public boolean update(@RequestBody ScheduleSetting sysJob) { sysJob.setCreateTime(new Date()); sysJob.setUpdateTime(new Date()); // 查询修改前任务 ScheduleSetting existedSysJob = new ScheduleSetting(); existedSysJob = existedSysJob.selectOne(new QueryWrapper().eq("job_id", sysJob.getJobId())); // 修改任务 boolean update = sysJob.update(new UpdateWrapper().eq("job_id", sysJob.getJobId())); if (!update) { return false; } else { // 修改成功,则先删除任务器中的任务,并重新添加 SchedulingRunnable task1 = new SchedulingRunnable(existedSysJob.getBeanName(), existedSysJob.getMethodName(), existedSysJob.getMethodParams()); cronTaskRegistrar.removeCronTask(task1); if (sysJob.getJobStatus().equals(1)) {// 如果修改后的任务状态是1就加入任务器 SchedulingRunnable task = new SchedulingRunnable(sysJob.getBeanName(), sysJob.getMethodName(), sysJob.getMethodParams()); cronTaskRegistrar.addCronTask(task, sysJob.getCronExpression()); } } return update; } @PostMapping("del/{jobId}") public boolean del(@PathVariable("jobId") Integer jobId) { // 先查询要删除的任务信息 ScheduleSetting existedSysJob = new ScheduleSetting(); existedSysJob = existedSysJob.selectOne(new QueryWrapper().eq("job_id", jobId)); // 删除 boolean del = existedSysJob.delete(new QueryWrapper().eq("job_id", jobId)); if (!del) return false; else {// 删除成功时要清除定时任务器中的对应任务 SchedulingRunnable task = new SchedulingRunnable(existedSysJob.getBeanName(), existedSysJob.getMethodName(), existedSysJob.getMethodParams()); cronTaskRegistrar.removeCronTask(task); } return del; } // 停止/启动任务 @PostMapping("changesStatus/{jobId}/{stop}") public boolean changesStatus(@PathVariable("jobId") Integer jobId, @PathVariable("stop") Integer stop) { // 修改任务状态 ScheduleSetting scheduleSetting = new ScheduleSetting(); scheduleSetting.setJobStatus(stop); boolean job_id = scheduleSetting.update(new UpdateWrapper().eq("job_id", jobId)); if (!job_id) { return false; } // 查询修改后的任务信息 ScheduleSetting existedSysJob = new ScheduleSetting(); existedSysJob = existedSysJob.selectOne(new QueryWrapper().eq("job_id", jobId)); // 如果状态是1则添加任务 if (existedSysJob.getJobStatus().equals(1)) { SchedulingRunnable task = new SchedulingRunnable(existedSysJob.getBeanName(), existedSysJob.getMethodName(), existedSysJob.getMethodParams()); cronTaskRegistrar.addCronTask(task, existedSysJob.getCronExpression()); } else { // 否则清除任务 SchedulingRunnable task = new SchedulingRunnable(existedSysJob.getBeanName(), existedSysJob.getMethodName(), existedSysJob.getMethodParams()); cronTaskRegistrar.removeCronTask(task); } return true; }
cron表达式语法:
[秒] [分] [小时] [日] [月] [周] [年]
注:[年]不是必须的域,可以省略[年],则一共6个域
通配符说明:
示例:
每隔5秒执行一次:*/5 * * * * ?
每隔1分钟执行一次:0 */1 * * * ?
每天23点执行一次:0 0 23 * * ?
每天凌晨1点执行一次:0 0 1 * * ?
每月1号凌晨1点执行一次:0 0 1 1 * ?
每月最后一天23点执行一次:0 0 23 L * ?
每周星期六凌晨1点实行一次:0 0 1 ? * L
在26分、29分、33分执行一次:0 26,29,33 * * * ?
每天的0点、13点、18点、21点都执行一次:0 0 0,13,18,21 * * ?
cron在线表达式生成器:https://cron.12qqe2.com/
这是小编在开发学习使用和总结的小Demo, 这中间或许也存在着不足,希望可以得到大家的理解和建议。如有侵权联系小编!
来源地址:https://blog.csdn.net/weixin_46522803/article/details/127313780
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本文标题: SpringBoot动态定时任务(完整版)
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