java如何用Dozer实例化子类？

Question

我有以下目标课程：

public class Person {
    private String firstName;
    private String lastName;
    ...
}

public class Employee extends Person {
    private String postion;
    ...
}

public class PersonContainer {
   private Person person;
   ...
}

这是我的消息来源：

public class Form {
    private String firstNameEmployee;
    private String lastNameEmployee;
    private String positionEmployee;
    ...
}

目标

我想获取对象PersonContainer，但不是使用Person对象，而是使用Employee对象。我真的不知道如何做到这一点。如何告诉Dozer实例化一个子类

此映射提供了个人对象：

 <mapping>
    <class-a>hl.test.dozer03.form.Form</class-a>
    <class-b>hl.test.dozer03.result.PersonContainer</class-b>


    <field>
        <a>firstNameEmployee</a>
        <b>person.firstName</b>
    </field>

    <field>
        <a>lastNameEmployee</a>
        <b>person.lastName</b>
    </field>

 </mapping>

这可以通过稍微修改此映射来实现吗

Answer 1

您需要使用自定义的createMethodhttp://dozer.sourceforge.net/documentation/customCreateMethod.html

大概是这样的：

<mapping>
  <class-a>hl.test.dozer03.form.Form</class-a>
  <class-b create- method="PersonContainerFactory.createPersonContainer">hl.test.dozer03.result.PersonContainer</class-b>


  <field>
    <a>firstNameEmployee</a>
    <b>person.firstName</b>
  </field>

  <field>
    <a>lastNameEmployee</a>
    <b>person.lastName</b>
  </field>

</mapping>

对于java类：

public class PersonContainerFactory {

  public static PersonContainer createPersonContainer(){
      PersonContainer cont = new PersonContainer();
      cont.setPerson(new Employee());
      return classA;
  }
}

Answer 2

尝试将Person类字段更改为protected，以便可以继承它们

public class Person {
    protected String firstName;
    protected String lastName;
    ...
}

从PersonContainer更改为（您想要的是什么）

public class EmployeeContainer {
   private Employee employee;
   ...
}

希望能有帮助