UserServiceImpl.java

@Override
    public List<User> getAllUsers() {
        User user = new User();
        List<User> ulist = new ArrayList<>();
        String query = "select * from user";
        try {
            dataBaseConnection.pstmt = dataBaseConnection.conn.prepareStatement(query);
            dataBaseConnection.rs = dataBaseConnection.pstmt.executeQuery();

            while ( dataBaseConnection.rs.next() ) {
                ulist.add(new User(dataBaseConnection.rs.getInt(1),
                        dataBaseConnection.rs.getString(2),
                        dataBaseConnection.rs.getString(3),
                        dataBaseConnection.rs.getString(4),
                        dataBaseConnection.rs.getString(5),
                        dataBaseConnection.rs.getString(6),
                        dataBaseConnection.rs.getInt(7),
                        dataBaseConnection.rs.getInt(8)
                ));
            }

            System.out.println("getting all users successfully...");

        } catch (Exception e) {
            e.printStackTrace();
        }
        return ulist;
    }

Controller Class name UserOperationController.java

@GetMapping("/get-all-user")
    public List<User> fetchUsers() {
        List<User> users = new ArrayList<User>();
        users = this.userService.getAllUsers();
        return users;
    }

I’m trying to store user information in a list but instead of storing user info list stores memory objects of user class. Here User is @Entity which has getters and setters. When call Get Mapping url
it produces output like:

[
    {
        "userName": null,
        "userEmail": null,
        "userPassword": null,
        "userState": null,
        "userCity": null,
        "userId": 0,
        "userAge": 0,
        "userMobile": 0
    },
    {
        "userName": null,
        "userEmail": null,
        "userPassword": null,
        "userState": null,
        "userCity": null,
        "userId": 0,
        "userAge": 0,
        "userMobile": 0
    }
]

instead of null values I’m expecting value from database but it produces output null values. Help me to find the correct answer.