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				@@ -2917,10 +2917,13 @@ public class CourseScheduleServiceImpl extends ServiceImpl<CourseScheduleDao, Co 
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				     @Override 
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				     @Transactional(rollbackFor = Exception.class) 
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				     public void courseStartRemind() { 
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				+        //距离开课时间小于等于20分钟 
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				         List<CourseSchedule> courseSchedules = this.lambdaQuery() 
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				                 .eq(CourseSchedule::getStatus, CourseScheduleEnum.NOT_START.getCode()) 
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				+                .in(CourseSchedule::getType, CourseScheduleEnum.PRACTICE.getCode(), CourseScheduleEnum.VIP.getCode()) 
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				                 .eq(CourseSchedule::getPushStartMsg, false) 
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				-                .lt(CourseSchedule::getStartTime, DateUtil.offsetMinute(new Date(), 20)) 
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				+                .eq(CourseSchedule::getLock, 0) 
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				+                .lt(CourseSchedule::getStartTime, DateUtil.offsetMinute(new Date(), 21)) 
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				                 .list(); 
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				         if (CollectionUtils.isEmpty(courseSchedules)) { 
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				             return; 
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