How do I map a DTO to an entity in my application?

How do I map a DTO to an entity in my application?

Mapping a DTO (Data Transfer Object) to an entity involves converting the data structure of the DTO to match the entity's structure. You can do this manually or use libraries like MapStruct or ModelMapper.

Can you give me an example of how to do this in Java?

Sure! Here's a simple example:

public class UserDTO {
    private String name;
    private String email;
}

public class UserEntity {
    private String name;
    private String email;
}

public UserEntity mapToEntity(UserDTO dto) {
    UserEntity entity = new UserEntity();
    entity.setName(dto.getName());
    entity.setEmail(dto.getEmail());
    return entity;
}

What if I have nested objects in my DTO?

For nested objects, you would typically map each nested DTO to its corresponding entity in a similar manner. You can create separate mapping methods for each nested object.