update

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

@@ -4,6 +4,7 @@ import static com.ym.mec.biz.dal.entity.MusicGroupStudentFee.PaymentStatus.NON_P
 
 import java.math.BigDecimal;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -376,6 +377,13 @@ public class MusicGroupPaymentCalenderDetailServiceImpl extends BaseServiceImpl<
 				throw new BizException("当前缴费状态不能添加学生");
 			}
 			
+			//判断学生是否已存在
+			Set<Integer> userList = musicGroupPaymentCalenderDetailDao.queryStudentIds(musicGroupPaymentCalenderId);
+
+			if(Collections.disjoint(userList, userIdList) == false){
+				throw new BizException("操作失败：包含已存在的学员");
+			}
+			
 			List<MusicGroupPaymentCalenderCourseSettings> courseSettingsList = musicGroupPaymentCalenderCourseSettingsDao.getWithPaymentCalender(musicGroupPaymentCalenderId);
 			
 			BigDecimal totalPrice = new BigDecimal(0);