休眠註釋和連接

Question

我想使用休眠從我的數據庫檢索數據...我有一個查詢，使用左連接連接兩個表（所有字段是一對一）。我需要知道如何用休眠和註釋來處理這個問題。我創建了兩個類映射到表，我試圖找出如何使用加入... Hibernate的文檔是混亂...

//一類

@Entity 
@Table(name = "Class1") 
public class Class1{ 

@Id 
@Column(name = "INITIAL") 
private String initial; 

    @Column(name = "NUMBER") 
    private Integer number; 

...

// twoclass

@Entity 
@Table(name = "Class2") 
public class Class2{ 

@Column(name = "STATE") 
private String state; 

    @Id 
    @Column(name = "NUMBER") 
    private Integer number 

...

Answer 1

@Entity 
@Table(name = "Class1") 
public class Class1 { 
    @Id 
    @Column(name = "INITIAL") 
    private String initial; 

    @Column(name = "NUMBER") 
    private Integer number; 
} 


@Entity 
@Table(name = "Class2") 
public class Class2 { 
    @Id 
    @Column(name = "STATE") 
    private String state; 

    @Column(name = "NUMBER") 
    private Integer number 

    @OneToOne 
    @JoinColumn(name = "columnWithClass1id") 
    private Class1 class1; 
}