MapStruct

public class Car { private String make; private int numberOfSeats; private CarType type; //constructor, getters, setters etc. }	public class CarDto { private String make; private int seatCount; private String type; //constructor, getters, setters etc. }
@Mapper public interface CarMapper { CarMapper INSTANCE = Mappers.getMapper(CarMapper.class); @Mapping(source = "numberOfSeats", target = "seatCount") CarDto toDto(Car car); }
@Test public void shouldMapCarToDto() { Car car = new Car("Morris", 5, CarType.SEDAN); CarDto dto = CarMapper.INSTANCE.toDto(car); //then assertThat(dto).isNotNull(); assertThat(dto.getMake()).isEqualTo("Morris"); assertThat(dto.getSeatCount()).isEqualTo(5); assertThat(dto.getType()).isEqualTo("SEDAN"); }

Lombok Example

@Data public class LeadDto implements Serializable { private static final long serialVersionUID = -1L; private String id; private String code; private String fullName; private String mobileNo; private String email; }	@Data public class LeadVyo implements Serializable { private static final long serialVersionUID = -2L; private String id; private String createdDate; private String createdTime; private String code; private String fullName; private String mobileNo; private String email; }
@Data @Entity @EntityListeners(AuditTrailListener.class) public class Lead implements AuditTrail { private static final long serialVersionUID = -3L; @Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sqn_lead") @GenericGenerator(name = "sqn_lead", strategy = "org.chorke.academia.utility.Base36Style", parameters = { @Parameter(name = Base36Style.INITIAL_VALUE, value = Base36Style.DIGIT_6_MIN), @Parameter(name = Base36Style.SEQUENCE_NAME, value = "sqn_lead"), @Parameter(name = Base36Style.ALLOCATION_SIZE, value = "1"), }) private String id; @Version private Long versionNo = 0L; private LocalDateTime createdOn; private String createdBy; private LocalDateTime updatedOn; private String updatedBy; private LocalDateTime deletedOn; private String code; private String fullName; private String mobileNo; private String email; }
@Mapper public interface LeadMapper { LeadMapper NEW = Mappers.getMapper(LeadMapper.class); LeadDto toDto(Lead e); default List<LeadDto> toDto(Collection<Lead> collection) { List<LeadDto> list = new ArrayList<>(); if (!CollectionUtils.isEmpty(collection)) collection.forEach(e -> list.add(toDto(e))); return list; } Lead toEnt(LeadDto d); default List<Lead> toEnt(Collection<LeadDto> collection) { List<Lead> list = new ArrayList<>(); if (!CollectionUtils.isEmpty(collection)) collection.forEach(d -> list.add(toEnt(d))); return list; } @Mappings({ @Mapping(target = "createdDate", source = "e.createdOn", dateFormat = "dd/MM/yyyy"), @Mapping(target = "createdTime", source = "e.createdOn", dateFormat = "HH:mm")}) LeadVyo toVyo(Lead e); default List<LeadVyo> toVyo(Collection<Lead> collection) { List<LeadVyo> list = new ArrayList<>(); if (!CollectionUtils.isEmpty(collection)) collection.forEach(e -> list.add(toVyo(e))); return list; } LeadVyo toVyo(LeadDto d); }

Maven Plugins

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.5.1</version>
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <annotationProcessorPaths>
            <path>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-processor</artifactId>
                <version>1.4.2.Final</version>
            </path>
            <path>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.4</version>
            </path>
            <path>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok-mapstruct-binding</artifactId>
                <version>0.2.0</version>
            </path>
        </annotationProcessorPaths>
    </configuration>
</plugin>

References

Mapping Collections with MapStruct IntelliJ IDEA MapStruct Support Quick Guide to MapStruct Quarkus MapStruct MapStruct Lombok