update

mec-web/src/main/java/com/ym/mec/web/controller/education/EduRegisterController.java

@@ -105,7 +105,7 @@ public class EduRegisterController extends BaseController {
 			for (Mapper mapper : instrumentNumList) {
 				if (!musicGroup.getMusicGroupId().equals(mapper.getKey()))
 					continue;
-				musicGroup.setBuyInstrumentNum((Integer) mapper.getValue());
+				musicGroup.setBuyInstrumentNum(Integer.parseInt(mapper.getValue().toString()));
 			}
 			for (Mapper mapper : moneyList) {
 				if (!musicGroup.getMusicGroupId().equals(mapper.getKey()))