mapstruct-使用来自另一个包的映射器

Question

我在我的项目中使用了mapstruct，它可以直接工作（所有的mapper都在一个包中）。现在我有了将一个映射器移动到另一个包的要求，但这并不能很好地工作。

de.zinnchen
├── dto
│   └── Car.java
├── entity
│   └── CarEntity.java
└── mapper
    └── a
        ├── CarMapper.java
        └── DateMapper.java

de.zinnchen
├── dto
│   └── Car.java
├── entity
│   └── CarEntity.java
└── mapper
    ├── a
    │   └── CarMapper.java
    └── b
        └── DateMapper.java

package de.zinnchen.dto;

import java.time.LocalDateTime;

public class Car {

  private String manufacturer;
  private String model;
  private String color;
  private LocalDateTime productionDate;
...

package de.zinnchen.entity;

import java.sql.Timestamp;
import java.time.Instant;
import java.time.LocalDateTime;

public class CarEntity {
  private String manufacturer;
  private String model;
  private String color;
  private Instant productionDate;
...

package de.zinnchen.mapper.a;

import de.zinnchen.dto.Car;
import de.zinnchen.entity.CarEntity;
import de.zinnchen.mapper.b.DateMapper;
import org.mapstruct.Mapper;

@Mapper(
    uses = DateMapper.class
)
public interface CarMapper {


  Car asDto(CarEntity entity);

  CarEntity asEntity(Car car);

}

package de.zinnchen.mapper.b;

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;

public class DateMapper {

  LocalDateTime instantToLocalDateTime(Instant instant) {
    return instant
        .atZone(ZoneId.of("UTC"))
        .toLocalDateTime();
  }

  Instant LocalDateTimeToInstant(LocalDateTime localDateTime) {
    return localDateTime.toInstant(ZoneOffset.UTC);
  }
}

你能帮我解决这个问题吗？

编辑包结构1的结果CarMapperImpl.java：

package de.zinnchen.mapper.a;

import de.zinnchen.dto.Car;
import de.zinnchen.entity.CarEntity;
import javax.annotation.processing.Generated;

@Generated(
    value = "org.mapstruct.ap.MappingProcessor",
    date = "2021-01-06T09:36:43+0100",
    comments = "version: 1.4.1.Final, compiler: javac, environment: Java 11.0.9.1 (AdoptOpenJDK)"
)
public class CarMapperImpl implements CarMapper {

    private final DateMapper dateMapper = new DateMapper();

    @Override
    public Car asDto(CarEntity entity) {
        if ( entity == null ) {
            return null;
        }

        Car car = new Car();

        car.setManufacturer( entity.getManufacturer() );
        car.setModel( entity.getModel() );
        car.setColor( entity.getColor() );
        car.setProductionDate( dateMapper.instantToLocalDateTime( entity.getProductionDate() ) );

        return car;
    }

    @Override
    public CarEntity asEntity(Car car) {
        if ( car == null ) {
            return null;
        }

        CarEntity carEntity = new CarEntity();

        carEntity.setManufacturer( car.getManufacturer() );
        carEntity.setModel( car.getModel() );
        carEntity.setColor( car.getColor() );
        carEntity.setProductionDate( dateMapper.LocalDateTimeToInstant( car.getProductionDate() ) );

        return carEntity;
    }
}

Answer 1

它不能工作的原因是datemapper中的方法受包保护，不能从其他包中使用。

因此，如果您将public添加到方法中，那么它就会起作用。