Hibernate一對一單向關聯，Hibernate一對一多向關聯

一對一多向關聯：

@Entity
@Table(name = "app_ad_setting",catalog="app_data")
public class Advert implements Serializable{
    private static final long serialVersionUID = 4888493675123264544L;

    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    @Id
    @Column(name = "uuid")
    private String uuid;
    @Column(name = "ad_cp_enable")
    private int aDCpEnable;
    @Column(name = "ad_wall_enable")
    private int aDWallEnable;
    @Column(name = "ad_banner_enable")
    private int aDBannerEnable;
    @Column(name = "ad_order")
    private int adOrder;
    @Column(name = "ad_type")
    private int adType;
    @Column(name = "download_url")
    private String downloadUrl;

    /*@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)//一對一單向配置
    @JoinColumn(name ="uuid",referencedColumnName="app_id",insertable=false,updatable=false)*/
    @OneToOne(cascade=CascadeType.ALL,fetch=FetchType.EAGER,mappedBy="advert")//一對一多向配置
    public AdvertScreen advertScreen;
    public AdvertScreen getAdvertScreen() {
        return advertScreen;
    }

    public void setAdvertScreen(AdvertScreen advertScreen) {
        this.advertScreen = advertScreen;
    }
}

@Entity
@Table(name = "app_ad_setting_cp",catalog="app_data")
public class AdvertScreen implements Serializable{
    private static final long serialVersionUID = 2486243779184672442L;

    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    @Id
    @Column(name = "app_id")
    private String appId;//使用32位UUID，這個設置屬於的APP的id
    @Column(name = "name")
    private String name;
    @Column(name = "install_limit")
    private int installLimit = -1;//廣告安裝量限制
    @Column(name = "title")
    private String title;//插屏的標題

    @OneToOne(cascade=CascadeType.ALL,fetch=FetchType.EAGER)
    @JoinColumn(name ="app_id",referencedColumnName="uuid")
    private Advert advert;
    public Advert getAdvert() {
        return advert;
    }
    public void setAdvert(Advert advert) {
        this.advert = advert;
    }
}

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Hibernate一對一單向配置：（只需要在一方關聯）

@Entity
@Table(name = "app_ad_setting",catalog="app_data")
public class Advert implements Serializable{
    private static final long serialVersionUID = 4888493675123264544L;

    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    @Id
    @Column(name = "uuid")
    private String uuid;
    @Column(name = "ad_cp_enable")
    private int aDCpEnable;

    @OneToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)//一對一單向配置,(lazy表示不立即查詢)
    @JoinColumn(name ="uuid",referencedColumnName="uuid")
    private AppBasic appBasic;

    public AppBasic getAppBasic() {
        return appBasic;
    }
    public void setAppBasic(AppBasic appBasic) {
        this.appBasic = appBasic;
    }

@Entity
@Table(name = "app_basic",catalog="app_data")
public class AppBasic implements Serializable{

    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    @Id
    @Column(name = "uuid")
    private String uuid;
    @Column(name = "cp_uuid")
    private String cpUuid;