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。