SpringBoot实现动态增删启停定时任务
Posted will的猜想
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了SpringBoot实现动态增删启停定时任务相关的知识，希望对你有一定的参考价值。
在spring boot项目中，可以通过@EnableScheduling注解和@Scheduled注解实现定时任务，也可以通过SchedulingConfigurer接口来实现定时任务。但是这两种方式不能动态添加、删除、启动、停止任务。
要实现动态增删启停定时任务功能，比较广泛的做法是集成Quartz框架。但是本人的开发原则是：在满足项目需求的情况下，尽量少的依赖其它框架，避免项目过于臃肿和复杂。
查看spring-context这个jar包中org.springframework.scheduling.ScheduledTaskRegistrar这个类的源代码，发现可以通过改造这个类就能实现动态增删启停定时任务功能。
定时任务列表页
定时任务执行日志
添加执行定时任务的线程池配置类
@Configuration
public 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(4);
taskScheduler.setRemoveOnCancelPolicy(true);
taskScheduler.setThreadNamePrefix("TaskSchedulerThreadPool-");
return taskScheduler;
添加ScheduledFuture的包装类。ScheduledFuture是ScheduledExecutorService定时任务线程池的执行结果。
public final class ScheduledTask
volatile ScheduledFuture<?> future;
/**
* 取消定时任务
*/
public void cancel()
ScheduledFuture<?> future = this.future;
if (future != null)
future.cancel(true);
添加Runnable接口实现类，被定时任务线程池调用，用来执行指定bean里面的方法。
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.isNotEmpty(params))
method = target.getClass().getDeclaredMethod(methodName, String.class);
else
method = target.getClass().getDeclaredMethod(methodName);
ReflectionUtils.makeAccessible(method);
if (StringUtils.isNotEmpty(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);
添加定时任务注册类，用来增加、删除定时任务。
@Component
public class CronTaskRegistrar implements DisposableBean
private final Map<Runnable, ScheduledTask> 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();
添加定时任务示例类
@Component("demoTask")
public class DemoTask
public void taskWithParams(String params)
System.out.println("执行有参示例任务：" + params);
public void taskNoParams()
System.out.println("执行无参示例任务");
定时任务数据库表设计
定时任务数据库表设计
添加定时任务实体类
public class SysJobPO
/**
* 任务ID
*/
private Integer jobId;
/**
* bean名称
*/
private String beanName;
/**
* 方法名称
*/
private String methodName;
/**
* 方法参数
*/
private String methodParams;
/**
* cron表达式
*/
private String cronExpression;
/**
* 状态（1正常 0暂停）
*/
private Integer jobStatus;
/**
* 备注
*/
private String remark;
/**
* 创建时间
*/
private Date createTime;
/**
* 更新时间
*/
private Date updateTime;
public Integer getJobId()
return jobId;
public void setJobId(Integer jobId)
this.jobId = jobId;
public String getBeanName()
return beanName;
public void setBeanName(String beanName)
this.beanName = beanName;
public String getMethodName()
return methodName;
public void setMethodName(String methodName)
this.methodName = methodName;
public String getMethodParams()
return methodParams;
public void setMethodParams(String methodParams)
this.methodParams = methodParams;
public String getCronExpression()
return cronExpression;
public void setCronExpression(String cronExpression)
this.cronExpression = cronExpression;
public Integer getJobStatus()
return jobStatus;
public void setJobStatus(Integer jobStatus)
this.jobStatus = jobStatus;
public String getRemark()
return remark;
public void setRemark(String remark)
this.remark = remark;
public Date getCreateTime()
return createTime;
public void setCreateTime(Date createTime)
this.createTime = createTime;
public Date getUpdateTime()
return updateTime;
public void setUpdateTime(Date updateTime)
this.updateTime = updateTime;
新增定时任务
新增定时任务
boolean success = sysJobRepository.addSysJob(sysJob);
if (!success)
return OperationResUtils.fail("新增失败");
else
if (sysJob.getJobStatus().equals(SysJobStatus.NORMAL.ordinal()))
SchedulingRunnable task = new SchedulingRunnable(sysJob.getBeanName(), sysJob.getMethodName(), sysJob.getMethodParams());
cronTaskRegistrar.addCronTask(task, sysJob.getCronExpression());
return OperationResUtils.success();
修改定时任务，先移除原来的任务，再启动新任务
boolean success = sysJobRepository.editSysJob(sysJob);
if (!success)
return OperationResUtils.fail("编辑失败");
else
//先移除再添加
if (existedSysJob.getJobStatus().equals(SysJobStatus.NORMAL.ordinal()))
SchedulingRunnable task = new SchedulingRunnable(existedSysJob.getBeanName(), existedSysJob.getMethodName(), existedSysJob.getMethodParams());
cronTaskRegistrar.removeCronTask(task);
if (sysJob.getJobStatus().equals(SysJobStatus.NORMAL.ordinal()))
SchedulingRunnable task = new SchedulingRunnable(sysJob.getBeanName(), sysJob.getMethodName(), sysJob.getMethodParams());
cronTaskRegistrar.addCronTask(task, sysJob.getCronExpression());
return OperationResUtils.success();
删除定时任务
boolean success = sysJobRepository.deleteSysJobById(req.getJobId());
if (!success)
return OperationResUtils.fail("删除失败");
else
if (existedSysJob.getJobStatus().equals(SysJobStatus.NORMAL.ordinal()))
SchedulingRunnable task = new SchedulingRunnable(existedSysJob.getBeanName(), existedSysJob.getMethodName(), existedSysJob.getMethodParams());
cronTaskRegistrar.removeCronTask(task);
return OperationResUtils.success();
定时任务启动/停止状态切换
if (existedSysJob.getJobStatus().equals(SysJobStatus.NORMAL.ordinal()))
SchedulingRunnable task = new SchedulingRunnable(existedSysJob.getBeanName(), existedSysJob.getMethodName(), existedSysJob.getMethodParams());
cronTaskRegistrar.addCronTask(task, existedSysJob.getCronExpression());
else
SchedulingRunnable task = new SchedulingRunnable(existedSysJob.getBeanName(), existedSysJob.getMethodName(), existedSysJob.getMethodParams());
cronTaskRegistrar.removeCronTask(task);
添加实现了CommandLineRunner接口的SysJobRunner类，当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。另外，欢迎关注公众号Java笔记虾，后台回复“后端面试”，送你一份面试题宝典！
@Service
public class SysJobRunner implements CommandLineRunner
private static final Logger logger = LoggerFactory.getLogger(SysJobRunner.class);
@Autowired
private ISysJobRepository sysJobRepository;
@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
List<SysJobPO> jobList = sysJobRepository.getSysJobListByStatus(SysJobStatus.NORMAL.ordinal());
if (CollectionUtils.isNotEmpty(jobList))
for (SysJobPO 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...");
工具类SpringContextUtils，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> T getBean(Class<T> requiredType)
return applicationContext.getBean(requiredType);
public static <T> T getBean(String name, Class<T> 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);
本文完，参考本文代码可成功运行，亲测！
以上是关于SpringBoot实现动态增删启停定时任务的主要内容，如果未能解决你的问题，请参考以下文章