JPA Entity attribute names missing in generated JSON

Question

I am using JPA and and Jackson is used for generating JSON

Emp.java

@Entity
@NamedQuery(name = \"Emp.findAll\", 
           query = \"select o.empNo, o.         


        

Answer 1

In the first case, your JPQL returns a List; each item in the list is an array containing the values of o.empNo and o.empName. Of course, when JSON is produced, it is produced as an array/list of items.

In the second case, you get a List, which each item being an Employee instance, so it is serialized like an object would be (list of attribute-values).