springboot动态修改定时任务

依赖

        <!-- spring boot 2.3版本后，如果需要使用校验，需手动导入validation包-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-validation</artifactId>
		</dependency>

配置：

printTime.cron=0/10 * * * * ?

package com.inesa.config;

import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.scheduling.Trigger;
import org.springframework.scheduling.TriggerContext;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.scheduling.support.PeriodicTrigger;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.util.Date;

/**
 * 定时任务
 */
@Data
@Slf4j
@Component
// @PropertySource("classpath:/task-config.ini")
public class ScheduleTask implements SchedulingConfigurer {

    @Value("${printTime.cron}")
    private String cron;

    private Long timer = 10000L;

    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        // 动态使用cron表达式设置循环间隔
        taskRegistrar.addTriggerTask(new Runnable() {
            @Override
            public void run() {
                log.info("Current time： {}", LocalDateTime.now());
            }
        }, new Trigger() {
            @Override
            public Date nextExecutionTime(TriggerContext triggerContext) {
                // 方法1
                // 使用CronTrigger触发器，可动态修改cron表达式来操作循环规则
//                CronTrigger cronTrigger = new CronTrigger(cron);
//                Date nextExecutionTime = cronTrigger.nextExecutionTime(triggerContext);
//                return nextExecutionTime;



                // 方法2
                // 使用不同的触发器，为设置循环时间的关键，区别于CronTrigger触发器，该触发器可随意设置循环间隔时间，单位为毫秒
                
                PeriodicTrigger periodicTrigger = new PeriodicTrigger(timer);
                Date nextExecutionTime = periodicTrigger.nextExecutionTime(triggerContext);
                return nextExecutionTime;
            }
        });
    }
}

package com.inesa.controller;
 

import com.inesa.config.ScheduleTask;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@Slf4j
@RestController
@RequestMapping("/test")
@Api(tags = "测试动态配置定时任务")
public class TestController {
 
    private final ScheduleTask scheduleTask;
 
    @Autowired
    public TestController(ScheduleTask scheduleTask) {
        this.scheduleTask = scheduleTask;
    }
 
    @GetMapping("/updateCron")
    @ApiOperation("动态配置定时任务-cron表达式-方法1")
    public String updateCron(@RequestParam("cron") String cron) {
        log.info("new cron :{}", cron);
        scheduleTask.setCron(cron);
        return "ok";
    }


    @GetMapping("/updateTimer")
    @ApiOperation("动态配置定时任务-时间间隔-方法2")
    public String updateTimer(@RequestParam("timer") Long timer) {
        log.info("new timer :{}", timer);
        scheduleTask.setTimer(timer);
        return "ok";
    }
}

结果：