Difference between Entity and DTO

Question

What is the difference between a DTO and an Entity? In details these are my questions:

1. What fields should the DTOs have? For example my entity classes are:<

Answer 1

Difference between DTO & Entity:

Entity is class mapped to table. Dto is class mapped to "view" layer mostly. What needed to store is entity & which needed to 'show' on web page is DTO.

Example : If I want to store employee model as follows : Take employee as an example, I need to store gender either male/female/other. But on JSP I need to show all three values as form 'options' so user can select one.

@Entity
public class Employee{
//annotate with @Id and others

private Long id;
private String name;
private Gender gender; //this is enum viz Male,female
}
//Now extend Dto with employee

public EmployeeDto extends Employee{
Gender[] genders=Gender.values(); //put all gender types in array.
}

while rendering jsp we can give

 //pointed towards entity gender field.
  Male
  Female
  Other

then in spring or some other framework whichever selected will be opted as gender in entity.This is made possible because Dto had all three values of gender in it. Similarly, as per situation things follows. As mostly we need most of entity fields on jsp we extend dto by entity.