Java 如何使用单独的Mysql表使用JPA实现枚举

我真的是一个新的使用JPA，但仍然不知道如何实现这一点，我会很高兴任何建议或解决方案

Mysql表：

CREATE TABLE REAL_STATE_TYPES (
real_state_type_id INT(6) NOT NULL,
real_state_type VARCHAR(50) NOT NULL,
PRIMARY KEY (real_state_type_id)
);

CREATE TABLE REAL_STATES (
address VARCHAR(30) NOT NULL,
admin_id VARCHAR(15) NOT NULL,
real_state_type_id INT(6) NOT NULL,
block VARCHAR(3) NOT NULL,
internal_id INT(5) NOT NULL,
PRIMARY KEY (address, block, internal_id),
FOREIGN KEY (real_state_type_id) REFERENCES REAL_STATE_TYPES (real_state_type_id),
FOREIGN KEY (admin_id) REFERENCES ADMINS (admin_id)
);

所以REAL_STATE的id是REAL_STATE_TYPE，如果我想保持这个表的关系，我如何通过JPA在java代码中映射它们

我的java类是：

import javax.persistence.Enumerated;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;

@Entity
@Table(name= "real_state_types")
public class RealStateType implements Serializable{

    private static final long serialVersionUID = 5442745398170857199L;
    @Id
    @Column(name= "real_state_type_id ")
    private int realStateTypeId;
    @Column(name= "real_state_type")
    @Enumerated(EnumType.STRING)
    private RealStateEnum realStateType;
    @OneToOne(mappedBy = "realStateType", cascade = {CascadeType.ALL})
    private RealState realState;

以及：

---

为了让它工作，我相信你需要1。除去

@OneToOne(mappedBy = "realStateType", cascade = {CascadeType.ALL})
private RealState realState;

来自RealStateType。2.改变

@Column(name = "real_state_type_id")
private RealStateType realStateType;

进入

处于真实状态

否则，如果可能的话，我只需要删除RealStateType@Entity并使用

@Enumerated(EnumType.STRING)
@Column(name = "real_state_type", nullable = false)
private RealStateEnum realStateType;

真实的

@JoinColumn(name = "real_state_type_id")
private RealStateType realStateType;

@Enumerated(EnumType.STRING)
@Column(name = "real_state_type", nullable = false)
private RealStateEnum realStateType;