Question

数据库有A、B两张表，A表中的主键为联合主键，其中一个主键是B的外键，用annotation怎么注解呢？

用XML配置可以用key-many-to-one，但是换成annotation没搞明白怎么配。。

@Entity
@Table(name="TCHAREG_RULES")
public class A implements java.io.Serializable {

private AId id;
private String name;
public String getName() {
return this.name;
}

@Id
public AId getId() {
return this.id;
}

public void setName(String name) {
this.name = name;
}

public void setId(AId id) {
this.id = id;
}

}

@Embeddable
public class AId implements Serializable {
private String Id;
private B b;

public String getId() {
return this.Id;
}

public Tcharge getB() {
return this.b;
}

public void setFuncId(String funcId) {
this.funcId = funcId;
}

public void setTcharge(Tcharge tcharge) {
this.tcharge = tcharge;
}

}
最后几个方法没改过来。。
public B getB(){
return this.b;
}

Answer 1

联合主键不会写，不过比如A表某列引用B表ID：

@JoinColumn(name = "BID", referencedColumnName = "ID")
@ManyToOne
private B id;