spring 动态schedule

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sping的@Scheduled只能是常量如：

 @Scheduled(cron = "1 3 0 * * ? ")

若想动态改变其值需要继承SchedulingConfigurer,如下：

import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.scheduling.Trigger;import org.springframework.scheduling.TriggerContext;import org.springframework.scheduling.annotation.EnableScheduling;import org.springframework.scheduling.annotation.SchedulingConfigurer;import org.springframework.scheduling.config.ScheduledTaskRegistrar;import org.springframework.scheduling.support.CronTrigger;import org.springframework.stereotype.Component;import java.util.Date;@Component@EnableSchedulingpublic class XXXSchedule implements SchedulingConfigurer {    private Logger logger = LoggerFactory.getLogger(IndexCloseSchedule.class);    private String cronConfig() {        String cronTabExpression = "0 50 3 * * ? ";        if (timeOfCloseIndex != null) {            cronTabExpression = "0 50 4 * * ? ";        }        return cronTabExpression;    }    @Override    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {        taskRegistrar.addTriggerTask(new Runnable() {            @Override            public void run() {                //do something            }        },new Trigger() {            @Override            public Date nextExecutionTime(TriggerContext triggerContext) {                String cron = cronConfig();                logger.info(cron);                CronTrigger trigger = new CronTrigger(cron);                Date nextExec = trigger.nextExecutionTime(triggerContext);                return nextExec;            }        });    }}

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