update

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

@@ -226,14 +226,13 @@ public class StudentCourseHomeworkServiceImpl extends BaseServiceImpl<Long, Stud
 		}
 		
         CourseHomeworkStudentDetailDto courseHomeworkStudentDetail = studentCourseHomeworkDao.findCourseHomeworkStudentDetail(courseScheduleID, userId);
-        courseHomeworkStudentDetail.setExpire(DateUtil.isOverdue(courseHomeworkStudentDetail.getSubmitTime(),
-                sysConfigDao.findConfigValue("file_expiration_time")));
         if(courseHomeworkStudentDetail == null){
         	courseHomeworkStudentDetail = new CourseHomeworkStudentDetailDto();
 			courseHomeworkStudentDetail.setMusicGroupTrainPlan(musicGroupTrainPlan);
         	return courseHomeworkStudentDetail;
         }
-        
+        courseHomeworkStudentDetail.setExpire(DateUtil.isOverdue(courseHomeworkStudentDetail.getSubmitTime(),
+                sysConfigDao.findConfigValue("file_expiration_time")));
 		courseHomeworkStudentDetail.setMusicGroupTrainPlan(musicGroupTrainPlan);
         
         SysUser sysUser = teacherDao.getUser(userId.intValue());