update

mec-biz/src/main/java/com/ym/mec/biz/service/impl/TeacherAttendanceServiceImpl.java

@@ -106,7 +106,7 @@ public class TeacherAttendanceServiceImpl extends BaseServiceImpl<Long, TeacherA
 	}
 
 	public void sendMessage(List<Integer> studentIds,CourseSchedule.CourseScheduleType type,String courseDate,MessageTypeEnum messageTypeEnum){
-		Map<Integer, String> receivers = studentIds.stream().collect(Collectors.toMap(e -> e, e -> e.toString()));
+		Map<Integer, String> receivers = studentIds.stream().collect(Collectors.toMap(e -> e, e -> e.toString(), (k1, k2) -> k1));
 		sendMessageSource.batchSendMessage(MessageSender.JIGUANG,messageTypeEnum,
 				receivers,null,"STUDENT",courseDate,type.getMsg());
 	}