实现rbac，角色有学生、管理员、老师，如何构造实体类

RBAC（Role-Based Access Control，基于角色的访问控制）是一种常见的访问控制模型，它将访问控制权限与用户角色相关联。在您的情况下，有三种角色：学生、管理员和老师。为了实现RBAC，您可以创建三个实体类，分别代表每个角色。

下面是一个简单的Java实体类的代码示例：

public class Student {
    private int id;
    private String name;
    private String password;

    public Student(int id, String name, String password) {
        this.id = id;
        this.name = name;
        this.password = password;
    }

    // Getters and Setters

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

public class Admin {
    private int id;
    private String name;
    private String password;

    public Admin(int id, String name, String password) {
        this.id = id;
        this.name = name;
        this.password = password;
    }

    // Getters and Setters

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

public class Teacher {
    private int id;
    private String name;
    private String password;

    public Teacher(int id, String name, String password) {
        this.id = id;
        this.name = name;
        this.password = password;
    }

    // Getters and Setters

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

这些实体类都包含了基本属性：id、name和password，并提供了相应的getter和setter方法。您可以根据实际需要添加更多的属性和方法。