Hibernate @可接合的一对一关系

我有两张表，如下所示：

AFFILIATES
----------
affiliateId (String) (PK)

CONVERSION
-----------
conversionId (Integer) (PK)
purchaseId (Integer) (not null)

PURCHASE
---------
purchaseId (Integer) (PK)
associateId (String) (allow NULL)

@Entity
@Table(name="AFFILIATES")
class Affiliate implements Serializable {

    @Id
    @Column(name= "affiliate_id")
    private String affiliateId;

    @OneToMany(mappedBy="affiliate", fetch=FetchType.LAZY)
    private Set<Conversion> conversion;

    public String getAffiliateId() {
        return affiliateId;
    }

    public void setAffiliateId(String affiliateId) {
        this.affiliateId = affiliateId;
    }

    public Set<Conversion> getConversion() {
        return conversion;
    }

    public void setConversion(Set<Conversion> conversion) {
        this.conversion = conversion;
    }

}


@Entity
@Table(name="CONVERSION")
class Conversion implements Serializable{

    @Id
    @Column(name="conversion_id")
    private int conversionId;

    @ManyToOne(optional=true, fetch=FetchType.LAZY)
    private Affiliate affiliate;

    public int getConversionId() {
        return conversionId;
    }

    public void setConversionId(int conversionId) {
        this.conversionId = conversionId;
    }

    public Affiliate getAffiliate() {
        return affiliate;
    }

    public void setAffiliate(Affiliate affiliate) {
        this.affiliate = affiliate;
    }

}

---

实体映射如下所示：

AFFILIATES
----------
affiliateId (String) (PK)

CONVERSION
-----------
conversionId (Integer) (PK)
purchaseId (Integer) (not null)

PURCHASE
---------
purchaseId (Integer) (PK)
associateId (String) (allow NULL)

@Entity
@Table(name="AFFILIATES")
class Affiliate implements Serializable {

    @Id
    @Column(name= "affiliate_id")
    private String affiliateId;

    @OneToMany(mappedBy="affiliate", fetch=FetchType.LAZY)
    private Set<Conversion> conversion;

    public String getAffiliateId() {
        return affiliateId;
    }

    public void setAffiliateId(String affiliateId) {
        this.affiliateId = affiliateId;
    }

    public Set<Conversion> getConversion() {
        return conversion;
    }

    public void setConversion(Set<Conversion> conversion) {
        this.conversion = conversion;
    }

}


@Entity
@Table(name="CONVERSION")
class Conversion implements Serializable{

    @Id
    @Column(name="conversion_id")
    private int conversionId;

    @ManyToOne(optional=true, fetch=FetchType.LAZY)
    private Affiliate affiliate;

    public int getConversionId() {
        return conversionId;
    }

    public void setConversionId(int conversionId) {
        this.conversionId = conversionId;
    }

    public Affiliate getAffiliate() {
        return affiliate;
    }

    public void setAffiliate(Affiliate affiliate) {
        this.affiliate = affiliate;
    }

}

我不知道如何获得

affiliateID

abc的所有转换

如果你有任何想法，请告诉我

---

转换应该通过第三个表PURCHASE

获取。我理解您的模式，PURCHASE似乎不仅仅是一个联接表，它本身就是一个实体。因此，创建一个采购实体，并与关联实体建立适当的关系。典型的联接表至少有两个指向相关表的外键。它可能具有代理主键或复合主键（使用两个外键的组合创建）。由于purchase有一个主键（很可能是代理键）和另一个外键列，因此最好将purchase建模为一个实体

您好，您是对的purchase是一个实体，但它与我的项目无关，因此我无法将其作为实体，因此我需要一些其他解决方法。购买也是通过hbm.xml文件生成的，所以基本上它不是JPA的一部分。