我有一个静态类,如:
public class Sex{
private final int code;
private final String status;
public static final int TOTAL = 3;
private Sex(int c, String s) {
code = c;
status = s;
}
public static final Sex UNDEFINED = new Sex(1, "UNDEFINED");
public static final Sex MALE = new Sex(2, "MALE");
public static final Sex FEMALE = new Sex(3, "FEMALE");
private static final Sex[] list = { UNDEFINED, MALE, FEMALE };
public int getCode() {
return code;
}
public String getStatus() {
return status;
}
public static Sex fromInt(int c) {
if (c < 1 || c > TOTAL)
throw new RuntimeException("Unknown code for fromInt in Sex");
return list[c-1];
}
public static List getSexList() {
return Arrays.asList(list);
}
}
而且,我有一个实体类
@Entity
@Table(name="person")
public class Person{
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;// setter/getter omitted
private Sex sex;
public final Sex getSex() {
return this.sex;
}
public final void setSex(final Sex argSex) {
this.sex = argSex;
}
}
我想在个人表的数据库中保存
sex_id
。但是setter / getter应该是指定的,因为我要将代码写为-Person person = new Person();
person.setSex(Sex.MALE);
Dao.savePerson(person);
如何用JPA注释
Sex
? 最佳答案
由于您不想在数据库中创建新的Sex
实例,为什么不对enum
使用class
而不是Sex
?
如果这样做,您只需在Sex
类中用@Enumerated(EnumType.STRING)
注释Person
属性。完整示例here(或仅使用Google,您会发现很多)
关于java - 在JPA( hibernate )中保存非持久对象ID,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/8412605/