我有兩種類型的數據要映射：注冊用戶Dto：public class SignUpUserDto { private String firstName; private String lastName; private String username; private String email; private String password; private String title;}注冊用戶：@Entitypublic class SignUpUser { private Long id; private String firstName; private String lastName; private String username; private String email; private String password; private Title title;}標題：public enum Title { JUNIOR("junior"), MIDDLE("middle"), SENIOR("senior"), MANAGER("manager"); private final String title; Title(final String title) { this.title = title; } public String toString() { return this.title; }}對于DTO title 成員是一個String。對于實體title 成員是Title。映射器應該是什么樣子的？我應該傳遞已經在服務中轉換的標題嗎？@Mapper(componentModel = "spring")public interface SignUpUserMapper { SignUpUserMapper INSTANCE = Mappers.getMapper(SignUpUserMapper.class); @Mapping(target = "title", expression = "title") public SignUpUserDto signUpUserToSignUpUserDto(SignUpUser signUpUser, String title); @Mapping(target = "title", source = "title") public SignUpUser signUpUserDtoToSignUpUser(SignUpUserDto signUpUserDto, Title title);}或者我應該在Mapper中進行轉換？@Mapper(componentModel = "spring", imports = Title.class)public interface SignUpUserMapper { SignUpUserMapper INSTANCE = Mappers.getMapper(SignUpUserMapper.class); @Mapping(target = "title", expression = "java(signUpUser.getTitle().toString())") public SignUpUserDto signUpUserToSignUpUserDto(SignUpUser signUpUser); @Mapping(target = "title", source = "java(new Title(signUpUserDto.getTitle()))") public SignUpUser signUpUserDtoToSignUpUser(SignUpUserDto signUpUserDto);}
2 回答
神不在的星期二
TA貢獻1963條經驗 獲得超6個贊
我應該傳遞已經在服務中轉換的標題嗎？
你絕對不應該這樣做。這是轉換器的工作，而不是服務的
嘗試以下方法：
1）枚舉類添加轉換方法
enum Title {
...
public static Title fromString(String title) {
if (title != null) {
for (Title t : Title.values()) {
if (t.toString().equals(title)) {
return t;
}
}
}
return null;
}
}
2) Mapper 接口增加2個轉換方法（僅限Java 8+）
@Mapper(componentModel = "spring")
public interface SignUpUserMapper {
SignUpUserDto signUpUserToSignUpUserDto(SignUpUser signUpUser);
SignUpUser signUpUserDtoToSignUpUser(SignUpUserDto signUpUserDto);
default String fromEnum(Title title) {
return title == null ? null : title.toString();
}
default Title toEnum(String title) {
return title == null ? null : Title.fromString(title);
}
}
慕碼人8056858
TA貢獻1803條經驗 獲得超6個贊
像這樣使用第二個選項：
@Mapper(componentModel = "spring", imports = Title.class)
public interface SignUpUserMapper {
SignUpUserMapper INSTANCE = Mappers.getMapper(SignUpUserMapper.class);
@Mapping(target = "title", expression = "java(signUpUser.getTitle().toString())")
public SignUpUserDto signUpUserToSignUpUserDto(SignUpUser signUpUser);
@Mapping(target = "title", source = "java(Title.valueOf(signUpUserDto.getTitle().toUpperCase()))")
public SignUpUser signUpUserDtoToSignUpUser(SignUpUserDto signUpUserDto);
}
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