更新生成者模式示例，添加木屋和砖房建造者实现，重构相关代码并增强可读性

go/builder/main.go

@@ -0,0 +1,120 @@
+package main
+
+import "fmt"
+
+/* 实例
+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
+公司——生成者模式公司（Builder Pattern Inc.）帮忙设计和建造房子。
+*/
+
+// 产品：房子
+type House struct {
+	Foundation string // 地基
+	Structure  string // 结构
+	Roof       string // 屋顶
+}
+
+// 建造者接口
+type HouseBuilder interface {
+	buildFoundation()
+	buildStructure()
+	buildRoof()
+	getHouse() House
+}
+
+// 具体建造者：木屋建造者
+type WoodenHouseBuilder struct {
+	house House
+}
+
+func (b *WoodenHouseBuilder) buildFoundation() {
+	b.house.Foundation = "木桩地基"
+	fmt.Println("  建造木桩地基")
+}
+
+func (b *WoodenHouseBuilder) buildStructure() {
+	b.house.Structure = "木结构"
+	fmt.Println("  建造木结构")
+}
+
+func (b *WoodenHouseBuilder) buildRoof() {
+	b.house.Roof = "木屋顶"
+	fmt.Println("  建造木屋顶")
+}
+
+func (b *WoodenHouseBuilder) getHouse() House {
+	return b.house
+}
+
+// 具体建造者：砖房建造者
+type BrickHouseBuilder struct {
+	house House
+}
+
+func (b *BrickHouseBuilder) buildFoundation() {
+	b.house.Foundation = "混凝土地基"
+	fmt.Println("  建造混凝土地基")
+}
+
+func (b *BrickHouseBuilder) buildStructure() {
+	b.house.Structure = "砖结构"
+	fmt.Println("  建造砖结构")
+}
+
+func (b *BrickHouseBuilder) buildRoof() {
+	b.house.Roof = "瓦屋顶"
+	fmt.Println("  建造瓦屋顶")
+}
+
+func (b *BrickHouseBuilder) getHouse() House {
+	return b.house
+}
+
+// 指挥者
+type Director struct {
+	builder HouseBuilder
+	house   House
+}
+
+// 重置房子
+func (d *Director) reset() {
+	d.house = House{}
+}
+
+func (d *Director) setBuilder(b HouseBuilder) {
+	d.builder = b
+}
+
+func (d *Director) constructHouse() {
+	d.reset()
+	d.builder.buildFoundation()
+	d.builder.buildStructure()
+	d.builder.buildRoof()
+	d.house = d.builder.getHouse()
+}
+
+func main() {
+	var builder HouseBuilder
+	var director Director
+	var house House
+
+	fmt.Println("========= 生成者模式 =========")
+	// 使用木屋建造者
+	builder = &WoodenHouseBuilder{}
+	director.setBuilder(builder)
+	fmt.Println("建造木屋：")
+	director.constructHouse()
+	house = director.house
+	fmt.Printf("木屋建造完成：%s %s %s\n\n", house.Foundation, house.Structure, house.Roof)
+
+	// 使用砖房建造者
+	builder = &BrickHouseBuilder{}
+	director.setBuilder(builder)
+	fmt.Println("建造砖房：")
+	director.constructHouse()
+	house = director.house
+	fmt.Printf("砖房建造完成：%s %s %s\n\n", house.Foundation, house.Structure, house.Roof)
+
+	fmt.Println("======= 生成者模式结束 =======")
+
+}