dto/MemberForm.java

(생략)
public class MemberForm { 
    private String email; 
    private String password; 

    public MemberForm(String email, String password) { 
        this.email = email; 
        this.password = password; 
    } 

    @Override 
    public String toString() { 
        return "User{" + 
                "email='" + email + '\'' + 
                ", password='" + password + '\'' + 
                '}'; 
    } 

    public Member toEntity() { 
        return new Member(null, email, password); 
    } 
}