解决mybatis 不支持乐观锁

mec-student/src/main/java/com/ym/mec/student/controller/MusicGroupRegisterController.java

@@ -35,7 +35,7 @@ public class MusicGroupRegisterController extends BaseController {
 
     @ApiOperation(value = "新增学生报名信息")
     @PostMapping("/add")
-    public HttpResponseResult add(@RequestBody StudentRegistration studentRegistration) throws IOException {
+    public HttpResponseResult add(@RequestBody StudentRegistration studentRegistration) throws Exception {
         Date date = new Date();
         MusicGroup musicGroup = musicGroupService.get(studentRegistration.getMusicGroupId());
         if (musicGroup == null) {