java–Hibernate ProjectionsLazy加载非必需的1对1映射

概述我有以下2个班级(为这篇文章修剪)public class ApplicationVO implements Serializable { /** * */ private static final long serialVersionUID = -3314933694797958587L; @Id

我有以下2个班级(为这篇文章修剪)

public class ApplicationVO implements Serializable {    /**     *      */    private static final long serialVersionUID = -3314933694797958587L;    @ID    @GeneratedValue(strategy = GenerationType.IDENTITY)    @Column(name = "ID",unique = true,nullable = false)    private Integer ID;    @OnetoOne(fetch = FetchType.LAZY,mappedBy = "application")    @Cascade({ CascadeType.ALL })    @JsonIgnore    private ApplicationHomeScreenVO applicationHomeScreen;......... }public class ApplicationHomeScreenVO implements Serializable {    /**     *      */    private static final long serialVersionUID = -9158898930601867545L;    @ID    @GeneratedValue(strategy = GenerationType.IDENTITY)    @Column(name = "ID",nullable = false)    @JsonProperty("ID")    private Integer ID;    @OnetoOne(fetch = FetchType.LAZY)    @Cascade({ CascadeType.SAVE_UPDATE })    @JoinColumn(name="application_ID")    @JsonProperty("application")    protected ApplicationVO application;        ...    ...    ...}

我正在尝试加载applicationByID wuthout加载applicationHomeScreen
不幸的是,延迟加载似乎没有用.我查看了其他帖子,他们建议在@OnetoOne注释上设置option = false标志但不幸​​的是,applicationHomeScreen可以是可选的

我现在正在尝试使用预测,但这对我来说也不起作用

当我调用以下方法时

 public ApplicationVO findApplicationByID(Integer applicationID) {        Criteria criteria = currentSession().createCriteria(ApplicationVO.class);        criteria.add(Restrictions.eq("ID",applicationID));        criteria.setProjection(Projections.projectionList()                .add(Projections.property("applicationHomeScreen"),"applicationHomeScreen"))              .setResulttransformer(transformers.aliasToBean(ApplicationVO.class));        ApplicationVO applicationVO = (ApplicationVO) criteria.uniqueResult();        return applicationVO;    }

我得到了堆栈跟踪

java.lang.Arrayindexoutofboundsexception: 0    at org.hibernate.loader.criteria.CriteriaLoader.getResultRow(CriteriaLoader.java:168)    at org.hibernate.loader.criteria.CriteriaLoader.getResultColumnorRow(CriteriaLoader.java:148)    at org.hibernate.loader.Loader.getRowFromresultSet(Loader.java:754)    at org.hibernate.loader.Loader.processResultSet(Loader.java:953)    at org.hibernate.loader.Loader.doquery(Loader.java:921)    at org.hibernate.loader.Loader.doqueryAndInitialiZenonLazyCollections(Loader.java:355)    at org.hibernate.loader.Loader.doList(Loader.java:2554)    at org.hibernate.loader.Loader.doList(Loader.java:2540)    at org.hibernate.loader.Loader.ListIgnorequeryCache(Loader.java:2370)    at org.hibernate.loader.Loader.List(Loader.java:2365)    at org.hibernate.loader.criteria.CriteriaLoader.List(CriteriaLoader.java:126)    at org.hibernate.internal.SessionImpl.List(SessionImpl.java:1682)    at org.hibernate.internal.Criteriaimpl.List(Criteriaimpl.java:380)    at org.hibernate.internal.Criteriaimpl.uniqueResult(Criteriaimpl.java:402)    at com.dao.database.impl.ApplicationDAOImpl.findApplicationByID(ApplicationDAOImpl.java:349)

任何人都可以推荐我可以使用的方法
a)使延迟加载适用于不需要关联的一对一映射
b)使预测工作,所以如果不需要,我不需要加载任何子关联

谢谢
达米安最佳答案唯一的选择是遵循以下步骤：

>将@LazyToOne添加到一对一关联：

@OnetoOne(fetch = FetchType.LAZY,mappedBy = "application")@Cascade({ CascadeType.ALL })@JsonIgnore@LazyToOne(value = LazyToOneOption.NO_PROXY)private ApplicationHomeScreenVO applicationHomeScreen;

>配置bytecode enhancement 总结

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