MapStruct
- Is not dead
- Solve type conversion DTOs to Entity and vice versa
- The library can generate bean mapper classes automatically
- Support Lombok
Pros
- Annotation based
- Easy Configurable
- Source generated
- Null safe
- Compile type Safe
Cons
- Autogenerated sources
Topics
- Map only defined fields:
@BeanMapping(ignoreByDefault = true) - Easy to start:
@Mapper - Easy to use:
org.mapstruct.factory.Mappers.getMapper(Class) - Field mapping:
@Mapping(target="employeeId", source = "entity.id") - Date Pattern:
@Mapping(target="employeeStartDt", source = "entity.startDt", dateFormat = "dd-MM-yyyy HH:mm:ss")}) - Customize flow:
@BeforeMappingand@AfterMapping - Java expressions:
@Mapping(target = "id", source = "person.id", defaultExpression = "java(java.util.UUID.randomUUID().toString())") - Enum support:
@ValueMapping(source = "DEBIT_CARD_CODE", target = "EXTERNAL_DEBIT_CARD_CODE") - Custom Mapper with Method:
@Named("inchToCentimeter")
public static double inchToCentimeter(int inch) {
return inch * 2.54;
}
@Mapping(source = "inch", target = "centimeter", qualifiedByName = "inchToCentimeter")
- Custom Mapper with Annotation:
@Qualifier
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.CLASS)
public @interface PoundToKilogramMapper {
}
@PoundToKilogramMapper
public static double poundToKilogram(int pound) {
return pound * 0.4535;
}
@Mapping(source = "pound", target = "kilogram", qualifiedBy = PoundToKilogramMapper.class)
- Spring support:
@Mapper(componentModel = "spring")