限定的按名称映射结构，我不明白为什么会出现此异常？

Question

@Mapper
public interface EmployeeMapper {
//qualifiedByName take the
@Mapping(source = "employee", target = "fullName", qualifiedByName = "fullNameByFirstAndLastName")
EmployeeDto toDto(Employee employee);
//do the Inverse of the toDto method
@InheritInverseConfiguration(name = "toDto")
Employee fromDto(EmployeeDto dto);
//take the same source emp
@Named("fullNameByFirstAndLastName")
default String fullNameByFirstAndLastName(Employee employee) {
return employee.getFirstname() + "-" + employee.getLastname();
}
/**
* recommended
* we can change the interface to abstract class and the methods also
*/
}
@Data
@Builder
public class Employee {
private int id;
private String firstname;
private String lastname;
}
@Data
public class EmployeeDto {
private int id;
private String fullName;//FirstName+ ' ' +lastName
}

• 未知属性"雇员"；在结果类型Employee.EmployeeBuilder中；null"；？-这段代码不是编译的，我想在EmployeDtO中将名字与全名中的刊名连接起来

Answer 1

编辑：正如Filip在评论中提到的，这应该从1.5.0开始修正。最终版本之后，请参阅https://github.com/mapstruct/mapstruct/issues/2356.但是您仍然需要为firstname和lastname字段创建手动映射。

---

原因是您反向继承了字段fullName的映射。反转后的CCD_ 4变为CCD_。

因为这毫无意义，因为由于您没有名为employee的字段，mapstruct会给出错误。

在这种情况下，您不能使用@InheritInverseConfiguration路由。相反，您需要自己编写反向映射。

这意味着

//qualifiedByName take the
@Mapping(source = "employee", target = "fullName", qualifiedByName = "fullNameByFirstAndLastName")
EmployeeDto toDto(Employee employee);
//do the Inverse of the toDto method
@InheritInverseConfiguration(name = "toDto")
Employee fromDto(EmployeeDto dto);

将变成类似的东西

//qualifiedByName take the
@Mapping(source = "employee", target = "fullName", qualifiedByName = "fullNameByFirstAndLastName")
EmployeeDto toDto(Employee employee);
//do the Inverse of the toDto method
@Mapping(source = "fullName", target = "firstname", qualifiedByName = "extractFirstNameFromFullName")
@Mapping(source = "fullName", target = "lastname", qualifiedByName = "extractLastNameFromFullName")
Employee fromDto(EmployeeDto dto);
// methods here to extract the first/last name from the fullname.