提交修改

api-web/api-interface/src/main/java/com/heyu/api/schedule/CronTriggerUtils.java

@@ -0,0 +1,90 @@
+package com.heyu.api.schedule;
+
+import com.heyu.api.data.utils.DateUtils;
+import lombok.extern.slf4j.Slf4j;
+import org.quartz.TriggerUtils;
+import org.quartz.impl.triggers.CronTriggerImpl;
+import org.springframework.scheduling.support.CronSequenceGenerator;
+
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+
+@Slf4j
+public class CronTriggerUtils {
+
+
+    /**
+     * @param cronExpression cron表达式
+     * @param numTimes       下一(几)次运行的时间
+     * @return
+     */
+    public static Date getNextExecTime(String cronExpression) {
+        CronTriggerImpl cronTriggerImpl = new CronTriggerImpl();
+        try {
+            cronTriggerImpl.setCronExpression(cronExpression);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        // 这个是重点，一行代码搞定
+        List<Date> dates = TriggerUtils.computeFireTimes(cronTriggerImpl, null, 1);
+        for (Date date : dates) {
+            return date;
+        }
+        return null;
+    }
+
+
+    /**
+     * @param cronExpression cron表达式
+     * @param numTimes       下一(几)次运行的时间
+     * @return
+     */
+    public static Date getCurrentExecTime(String cronExpression) {
+        CronSequenceGenerator cronSequenceGenerator = new CronSequenceGenerator(cronExpression);
+        Date lastMinute=  DateUtils.getBeforeMinute(new Date(),1);
+        Date nextTriggerTime = cronSequenceGenerator.next(lastMinute);//lastMinute 我这里是上一分钟的date类型对象
+        return nextTriggerTime;
+    }
+
+    /**
+     * @param cronExpression cron表达式
+     * @param numTimes       下一(几)次运行的时间
+     * @return
+     */
+    public static List<String> getNextsExecTime(String cronExpression, Integer numTimes) {
+        List<String> list = new ArrayList<>();
+        CronTriggerImpl cronTriggerImpl = new CronTriggerImpl();
+        try {
+            cronTriggerImpl.setCronExpression(cronExpression);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        // 这个是重点，一行代码搞定
+        List<Date> dates = TriggerUtils.computeFireTimes(cronTriggerImpl, null, numTimes);
+        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        for (Date date : dates) {
+            list.add(dateFormat.format(date));
+        }
+        return list;
+    }
+
+    public static void main(String[] args) throws Exception {
+        String cronExpression = "0 * * * * ?";
+        Date nextTunTime = CronTriggerUtils.getCurrentExecTime(cronExpression);
+        System.out.println(nextTunTime);
+        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        CronSequenceGenerator cronSequenceGenerator = new CronSequenceGenerator(cronExpression);
+        for (int i = 0; i < 10; i++){
+            log.info("执行时间：" + df.format(nextTunTime));
+            Date nextTriggerTime = cronSequenceGenerator.next(nextTunTime);//lastMinute 我这里是上一分钟的date类型对象
+            nextTunTime = nextTriggerTime;
+        }
+
+    }
+
+}