Mapstruct 映射 - 字符串到列表<String>

Question

我正在努力将字符串对象从 source(Relation.class) 映射到目标列表(RelationListDTO.class) 。

关系.java

   public class Relation {

    private String name;
    private String email;
    private String completeAddress;

    // getters and setters
}

关系列表DTO.java

public class RelationListDTO {
        private String name;
        private String email;
        private List<Address> address;

        // getters and setters
    }

地址.java

public class Address{
private String street;
private String city;
// getters and setters
}

映射器类

@映射器

public interface RelationMapper {

    @Mapping(source = "completeAddress", target = "address.get(0).city")
            RelationListDTO relationToListDto(Relation relation);
} 

但它不起作用。有人可以帮忙吗？

Answer 1

您尝试使用 MapStruct 执行的操作是不可能的。因为 MapStruct 不适用于运行时对象。MapStruct 只生成用于映射两个 bean 的纯 java 代码。我发现你的要求有点独特。您有一个地址列表，但只想从源对象映射城市？你仍然可以这样做

@Mapping( target = "address", source = "completeAddress")
RelationListDTO relationToListDto(Relation relation);

// MapStruct will know to use this method to map between a `String` and `List<Address>`
default List<Address> mapAddress(String relation){
      //create new arraylist
      // create new AddressObject and set completeAddress to address.city
     // add that to list and return list

}