SpringBoot 使用定时任务动态执行任务

import com.patient.core.adapter.CorsFilter;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.scheduling.annotation.EnableScheduling;
 
@EnableScheduling//开启定时任务注解
@SpringBootApplication
@MapperScan("com.patient.core.mapper")
public class PatientSystemApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(PatientSystemApplication.class, args);
    }
 
    @Bean
    public FilterRegistrationBean setFilter() {
        FilterRegistrationBean filterBean = new FilterRegistrationBean();
        filterBean.setFilter(new CorsFilter());
        filterBean.setName("CorsFilter");
        filterBean.addUrlPatterns("/*");
        return filterBean;
    }
}

　　

import com.patient.core.service.UserService;
import com.patient.core.util.DateUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
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 java.util.Date;
 
@Configuration
public class ReminderTask implements SchedulingConfigurer {
    private static Logger log = LoggerFactory.getLogger(ReminderTask.class);
 
    @Autowired
    private UserService userService;
 
　　
//项目启动会自动执行该Controller 类，首先执行触发器的方法，查询要执行业务逻辑的时间（需要转换成Cron表达式），动态的执行业务逻辑，业务逻辑执行完毕会再次执行触发器 设定下次执行时间
    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        scheduledTaskRegistrar.addTriggerTask(doTask(), getTrigger());
    }
 
   // 业务执行方法
    private Runnable doTask() {
        return new Runnable() {
            @Override
            public void run() {
                try {
               //业务逻辑
                log.info("业务执行方法");
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
    }
 
     //业务触发器
    private Trigger getTrigger() {
        return new Trigger() {
            @Override
            public Date nextExecutionTime(TriggerContext triggerContext) {
                String dateStr = userService.getLastTime();
                if ("".equals(dateStr) || dateStr == null)
                    return null;
                String cron = DateUtils.getCron(DateUtils.strToDateLong(dateStr));
                //定时任务触发,可修改定时任务的执行周期
                CronTrigger trigger = new CronTrigger(cron);
                Date nextExecDate = trigger.nextExecutionTime(triggerContext);
                log.info("业务触发器："+DateUtils.dateToStrLong(nextExecDate));
                return nextExecDate;
            }
        };
    }