<dependency> <groupId>org.mapstruct</groupId> <artifactId>mapstruct-core</artifactId> <version>1.4.2.Final</version> </dependency> @Mapper public interface MyMapper { MyMapper INSTANCE = Mappers.getMapper(MyMapper.class); @Mapping(source = "sourceProperty", target = "targetProperty") TargetObject sourceToTarget(SourceObject source); @Mapping(source = "targetProperty", target = "sourceProperty") SourceObject targetToSource(TargetObject target); } SourceObject source = new SourceObject(); source.setSourceProperty("test"); TargetObject target = MyMapper.INSTANCE.sourceToTarget(source);