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;
@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(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;
/**
* 取消定时任务
*/
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
@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();
}
} @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;@Data
public class ScheduleSetting extends Model<ScheduleSetting> {
/**
* 任务ID
*/
@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;
}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<ScheduleSetting> jobList = existedSysJob.selectList(new QueryWrapper<ScheduleSetting>().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> 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);
}
}@RestController
public class TestController {
@Autowired
private CronTaskRegistrar cronTaskRegistrar;
/**
* 添加定时任务
*
* @param sysJob
* @return
*/
@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;
}
/**
* 修改定时任务
*
* @param sysJob
* @return
*/
@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<ScheduleSetting>().eq("job_id", sysJob.getJobId()));
// 修改任务
boolean update = sysJob.update(new UpdateWrapper<ScheduleSetting>().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;
}
/**
* 删除任务
*
* @param jobId
* @return
*/
@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<ScheduleSetting>().eq("job_id", jobId));
// 删除
boolean del = existedSysJob.delete(new QueryWrapper<ScheduleSetting>().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<ScheduleSetting>().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<ScheduleSetting>().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！