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02-创建型模式-工厂模式.js

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/* 工厂类 */

class Factory {

static getInstance(type) {

switch (type) {

case 'Product1':

return new Product1()

case 'Product2':

return new Product2()

default:

throw new Error('当前没有这个产品')

}

}

}

/* 产品类1 */

class Product1 {

constructor() { this.type = 'Product1' }

operate() { console.log(this.type) }

}

/* 产品类2 */

class Product2 {

constructor() { this.type = 'Product2' }

operate() { console.log(this.type) }

}

const prod1 = Factory.getInstance('Product1')

prod1.operate() // 输出: Product1