Question

我知道您应该扩展Model以获得所有jpa功能。但是，java不允许多重继承...因此，我想知道如何在架构中发挥以下设计：

public class Person extends Model {
}

// should be able to extend Person
public class Doctor extends Model {
}

// should be able to extend Person     
public class Patient extends Model {
}

public class Item extends Model {
    // Doens't matter whether it's a Doctor or a Patient
    @ManyToMany
    public List<Person> owners;
}

提前致谢。

Answer 1

您的Doctor和Patient对象应该从Person继承。 Java不允许多重继承，但您可以使用继承模型的Person扩展子对象。


public class Person extends Model {
}

public class Doctor extends Person {
}

public class Patient extends Person{
}

public class Item extends Model {
    @ManyToMany
    public List owners;
}

你在Java中做不到的是：



public class Doctor extends Person, Model {
}

如何让继承在我的模型层中工作？

1 个答案: