Indcredible mistake ent.SuperStudentEntity cannot be cast ent.SuperStudentEntity - spring

Question

Hibernate+Spring Boot
i can not get object
My controller
#RequestMapping(value = "/get/{id}", method = RequestMethod.GET)
public #ResponseBody
SuperStudentEntity getById(#PathVariable("id") int id) {
return new StudentDAOImpl().getById(id);
}
DAO function
public SuperStudentEntity getById(int id){
openTransactionSession();
Session s = getSession();
String sql = "SELECT * FROM student WHERE id_student =:id";
org.hibernate.query.Query query = s.createNativeQuery(sql).addEntity(SuperStudentEntity.class);
query.setParameter("id",id);
SuperStudentEntity student = (SuperStudentEntity) query.getSingleResult();
closeTransactionSesstion();
return student;
}
And get exceptions
java.lang.ClassCastException: org.codexample.ent.SuperStudentEntity cannot be cast to org.codexample.ent.SuperStudentEntity
at org.codexample.impldao.StudentDAOImpl.getById(StudentDAOImpl.java:45) ~[classes/:na]
at org.codexample.controllers.StudentController.getById(StudentController.java:54) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at ....
And browser tell me :
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Thu May 18 20:02:30 MSK 2017 There was an unexpected error (type=Internal Server Error, status=500). org.codexample.ent.SuperStudentEntity cannot be cast to org.codexample.ent.SuperStudentEntity
I don't understand how resolve it problem.