Java 使用org.mapstruct framework进行一对多关系映射
如何使用org.mapstruct framework映射一对多关系 DTO类别:Java 使用org.mapstruct framework进行一对多关系映射,java,spring,mapstruct,bidirectional-relation,Java,Spring,Mapstruct,Bidirectional Relation,如何使用org.mapstruct framework映射一对多关系 DTO类别: @Data public class ScheduledJobDTO { private String jobName; private String jobGroup; private String jobClass; private String cronExpression; private Boolean cronJob; private Long rep
@Data
public class ScheduledJobDTO {
private String jobName;
private String jobGroup;
private String jobClass;
private String cronExpression;
private Boolean cronJob;
private Long repeatTime;
private Integer repeatCount;
private Set<ScheduledJobParamsDTO> paramtersDTOs;
}
@Data
@EqualsAndHashCode
public class ScheduledJobParamsDTO {
String name;
String value;
}
现在,上面的映射器正在映射ScheduledJob和ScheduledJobParams,但是ScheduledJobParams具有ScheduledJob的引用
如何将引用ScheduledJob映射到ScheduledJobParams?您可以通过
@AfterMapping
和@MappedTarget
实现这一点。参考文档中对此进行了描述:
但是,我确信,当您从DTO映射回实体时,您不需要填充双向关系(这是我理解为您所指的“域”)。注意:如果处理不当,将此类对象打印或序列化为JSON或XML会抛出
java.lang.StackOverflowerError
。您可以通过@AfterMapping
和@MappedTarget
实现这一点。参考文档中对此进行了描述:
但是,我确信,当您从DTO映射回实体时,您不需要填充双向关系(这是我理解为您所指的“域”)。注意:如果处理不当,将此类对象打印或序列化为JSON或XML会抛出java.lang.StackOverflowerError
@Data
@Entity
@Table(name = "scheduled_job")
public class ScheduledJob {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "job_name")
private String jobName;
@Column(name = "job_group")
private String jobGroup;
@Column(name = "job_class")
private String jobClass;
@Column(name = "cron_expression")
private String cronExpression;
@Column(name = "is_cron_job")
private Boolean cronJob;
@Column(name = "repeat_time")
private Long repeatTime;
@Column(name = "repeat_count")
private Integer repeatCount;
@Column(name = "trigger_start_date")
private LocalDate triggerStartDate;
@Column(name = "trigger_end_date")
private LocalDate triggerEndDate;
@Column(name = "created_at")
private LocalDate createdAt;
@Column(name = "modified_at")
private LocalDate modifiedAt;
@Column(name = "is_active")
private Boolean active;
@OneToMany(mappedBy = "scheduledJob")
private Set<ScheduledJobParams> parameters;
}
@Data
@Entity
@Table(name = "scheduled_job_params")
@EqualsAndHashCode
public class ScheduledJobParams {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
@ManyToOne(fetch = FetchType.LAZY, optional = false)
@JoinColumn(name = "scheduled_job_id", nullable = false)
ScheduledJob scheduledJob;
String name;
String value;
}
@Mapping(source = ".", target = ".")
@Mapping(source = "paramtersDTOs", target = "parameters")
ScheduledJob mapToDomain(ScheduledJobDTO scheduledJobDTO);
// Java 8+ otherwise you need to use an abstract class and a for-loop instead
@Mapper(componentModel = "spring")
public interface ScheduledJobMapper {
@Mapping(target = "parameters", source = "paramtersDTOs")
ScheduledJob mapToDomain(ScheduledJobDTO dto);
@AfterMapping
default void after(@MappingTarget ScheduledJob domain, ScheduledJobDTO dto) {
domain.getParameters().forEach(scheduledJobParams -> {
scheduledJobParams.setScheduledJob(domain);
});
}
}