小编use*_*772的帖子

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？