Spring Data Jpa实现自定义repository转DTO
近期项目中需要关联几张表再把字段转出来,在这里记录以下,我感觉网上写的都不太规范和清晰。
@Entity @SqlResultSetMapping( name="TestMapping", entities={ @EntityResult( entityClass=com.xxx.xx.data.model.TestEntity.class, fields={ @FieldResult(name="id",column="id"), @FieldResult(name="localTime",column="time"), @FieldResult(name="maximumAppointment",column="maxAppointment"), } ) } ) @NamedNativeQuery(name="getTestQuery", query="selecttableC.idasid,tableB.time,tableC.maximumAppointmentasmaxAppointmentfromtableB"+ "innerjointableAontableA.id=tableB.tableAId"+ "innerjointableContableB.id=tableC.tableBId"+ "innerjoincustomoncustom.id=tableA.customId"+ "where"+ "tableA.locationId=:locationId"+ "andcustom.id=:customId"+ "andtableB.deleted=false",resultSetMapping="TestMapping") @Data publicclassTestEntity{ @Id privateStringid; privateLocalTimelocalTime; privateIntegermaximumAppointment; }
需要声明接口:
@Repository publicinterfaceTestEntityRepositoryextendsJpaRepository{ @Query(name="getTestQuery") List getTestQuery(StringlocationId,StringcustomId); }
若不想声明接口,那可以用EntityManager来实现。
CriteriaBuildercriteriaBuilder=entityManager.getCriteriaBuilder();
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持毛票票。