update

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

@@ -55,7 +55,9 @@ public class StudentManageServiceImpl implements StudentManageService {
             Map<Integer, SysUserCashAccount> collect = byUserIds.stream()
                     .collect(Collectors.toMap(SysUserCashAccount::getUserId, sysUserCashAccount -> sysUserCashAccount));
             dataList.forEach(studentManageListDto -> {
-                studentManageListDto.setCourseBalance(collect.get(studentManageListDto.getUserId()).getCourseBalance());
+                if(collect.get(studentManageListDto.getUserId()) != null){
+                    studentManageListDto.setCourseBalance(collect.get(studentManageListDto.getUserId()).getCourseBalance());
+                }
             });
         }
         if (count == 0) {