Spring MVC @ResponseBody return list is not proper json reponse using hibernate

Question

Spring MVC @ResponseBody return list is not proper json reponse(no key & brace brackets) while using hibernate but getting proper json response if not using hibernate.

DAO

public List getStudentData(){
String hql= "select s.id, s.name, s.email from Student s";
Query query=  sessionFactory.getCurrentSession().createQuery(hql);
List list= query.list();
return list;
}

Controller

@RequestMapping(value="/fetchAllData" , method=RequestMethod.GET)
public @ResponseBody List studentContainer1(HttpServletRequest response){
    return ss.getStudentData();
}

JSON(I am getting)

[[1,"pratyush","pratyush.ankit@gmail.com"]]

But I need response like below :

[{"id":1,"name":"Pratyush","email":"pratyush.ankit@gmail.com"}]

Answer 1

You should change your DAO function to:

public List<Student> getStudentData(){
    String hql = "from Student";
    Query query =  sessionFactory.getCurrentSession().createQuery(hql);
    List<Student> list = query.list();
    return list;
}

The way you defined the hql query, it would return List of arrays in a form of [id, name, email]. And it would be impossible to convert it to a proper json later (the labels would be lost by that point). What you want is to make getStudentData() return List of Student objects instead.