121 lines
2.5 KiB
Go
121 lines
2.5 KiB
Go
package main
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import "fmt"
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/* 实例
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汤宝宝想要建造一栋属于自己的房子，于是找来了著名的建筑设计
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公司——生成者模式公司（Builder Pattern Inc.）帮忙设计和建造房子。
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*/
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// 产品：房子
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type House struct {
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Foundation string // 地基
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Structure string // 结构
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Roof string // 屋顶
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}
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// 建造者接口
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type HouseBuilder interface {
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buildFoundation()
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buildStructure()
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buildRoof()
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getHouse() House
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}
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// 具体建造者：木屋建造者
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type WoodenHouseBuilder struct {
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house House
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}
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func (b *WoodenHouseBuilder) buildFoundation() {
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b.house.Foundation = "木桩地基"
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fmt.Println(" 建造木桩地基")
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}
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func (b *WoodenHouseBuilder) buildStructure() {
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b.house.Structure = "木结构"
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fmt.Println(" 建造木结构")
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}
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func (b *WoodenHouseBuilder) buildRoof() {
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b.house.Roof = "木屋顶"
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fmt.Println(" 建造木屋顶")
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}
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func (b *WoodenHouseBuilder) getHouse() House {
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return b.house
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}
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// 具体建造者：砖房建造者
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type BrickHouseBuilder struct {
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house House
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}
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func (b *BrickHouseBuilder) buildFoundation() {
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b.house.Foundation = "混凝土地基"
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fmt.Println(" 建造混凝土地基")
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}
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func (b *BrickHouseBuilder) buildStructure() {
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b.house.Structure = "砖结构"
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fmt.Println(" 建造砖结构")
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}
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func (b *BrickHouseBuilder) buildRoof() {
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b.house.Roof = "瓦屋顶"
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fmt.Println(" 建造瓦屋顶")
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}
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func (b *BrickHouseBuilder) getHouse() House {
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return b.house
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}
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// 指挥者
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type Director struct {
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builder HouseBuilder
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house House
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}
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// 重置房子
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func (d *Director) reset() {
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d.house = House{}
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}
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func (d *Director) setBuilder(b HouseBuilder) {
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d.builder = b
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}
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func (d *Director) constructHouse() {
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d.reset()
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d.builder.buildFoundation()
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d.builder.buildStructure()
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d.builder.buildRoof()
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d.house = d.builder.getHouse()
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}
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func main() {
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var builder HouseBuilder
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var director Director
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var house House
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fmt.Println("========= 生成者模式 =========")
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// 使用木屋建造者
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builder = &WoodenHouseBuilder{}
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director.setBuilder(builder)
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fmt.Println("建造木屋：")
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director.constructHouse()
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house = director.house
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fmt.Printf("木屋建造完成：%s %s %s\n\n", house.Foundation, house.Structure, house.Roof)
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// 使用砖房建造者
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builder = &BrickHouseBuilder{}
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director.setBuilder(builder)
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fmt.Println("建造砖房：")
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director.constructHouse()
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house = director.house
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fmt.Printf("砖房建造完成：%s %s %s\n\n", house.Foundation, house.Structure, house.Roof)
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fmt.Println("======= 生成者模式结束 =======")
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}
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