如何在ts的接口中封装方法

可以使用interface来封装方法，例如：

interface Person {
name: string;
age: number;
sayHello(): void;
}

class Student implements Person {
name: string;
age: number;

constructor(name: string, age: number) {
this.name = name;
this.age = age;
}

sayHello() {
console.log(`Hello, my name is ${this.name} and I am ${this.age} years old.`);
}
}

const student = new Student('John', 20);
student.sayHello(); // Output: "Hello, my name is John and I am 20 years old."