Pojo到DTO-Bean映射

Question

我经历了stackoverflows，ModelMapper，Dozer等。我无法弄清楚将Entity映射到DTO的现有逻辑。以下是实体和DTO的类：package com.entity;public class EmployeeRequest {    private User user;    private String userId;    public EmployeeRequest(){    }       //Getters and Setters Below}package com.entity;public class User {    private Address address;    private Name name;    public User(){    }    //Getters and Setters Below}package com.entity;public class Address {    private int flatNo;     private String city;    public Address(){    }    //Getters and Setters Below}package com.entity;public class Name {    private String firstName;    private String lastName;    public Name(){    }       //Getters and Setters Below}package com.dto;public class EmployeeRequestDTO {    private UserDTO user;    private String userId;    public EmployeeRequestDTO(){    }    //Getters and Setters Below}package com.dto;public class UserDTO {    private AddressDTO address;    private NameDTO name;    public UserDTO() {    }    //Getters and Setters Below}package com.dto;public class AddressDTO {    private int flatNo;    private String city;    public AddressDTO() {    }    //Getters and Setters Below}package com.dto;public class NameDTO {    private String firstName;    private String lastName;    public NameDTO(){           }    //Getters and Setters Below}如何将实体值映射到DTO？分配后，实体中的任何更改都不应影响DTO，反之亦然。

Answer 1

下面的1行足以映射：

EmployeeRequestDTO employeeRequestDTO = new ModelMapper().map(employeeRequest, EmployeeRequestDTO.class);

Answer 2

我建议为此查看一下ModelProjector。它以很小的占用空间和额外的编码完全支持您所设想的用例。