update

mec-biz/src/main/java/com/ym/mec/biz/dal/entity/TeacherCourseStatistics.java

@@ -65,7 +65,7 @@ public class TeacherCourseStatistics {
     /**
     * 平均上课时长
     */
-    private Integer averageClassMinutes;
+    private Integer averageClassMinutes = 0;
 
     private Boolean lowSalary;