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How to use JPA, @MappedSuperclass

How to use JPA, @MappedSuperclass

First, define an abstract class and annotate it with @MappedSuperclass. This is not an entity:

@MappedSuperclass
public abstract class User implements Serializable {
   …
}

Second, each entity should extend the User class. For example, Student and Teacher entitites:

@Entity
public class Student extends User implements Serializable {
   …
}

@Entity
public class Teacher extends User implements Serializable {
   …
}

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