实现享元模式示例，添加服装、服装工厂和客户类，增强代码可读性

go/flyweight/main.go

@@ -0,0 +1,102 @@
+package main
+
+import "fmt"
+
+/*
+实例：
+汤宝宝开了一家服装租赁店，好多客人来店里租衣服~
+*/
+
+// 享元对象 - 服装
+type Clothing struct {
+	style string
+	size  string
+	color string
+}
+
+func (c *Clothing) Show() {
+	fmt.Printf("服装款式：%s，尺码：%s，颜色：%s\n", c.style, c.size, c.color)
+}
+
+// 享元工厂 - 服装店
+type ClothingFactory struct {
+	clothingPool map[string]*Clothing
+}
+
+func NewClothingFactory() *ClothingFactory {
+	return &ClothingFactory{
+		clothingPool: make(map[string]*Clothing),
+	}
+}
+
+func (f *ClothingFactory) GetClothing(style, size, color string) *Clothing {
+	key := style + "-" + size + "-" + color
+	if clothing, exists := f.clothingPool[key]; exists {
+		return clothing
+	}
+	newClothing := &Clothing{style: style, size: size, color: color}
+	f.clothingPool[key] = newClothing
+	return newClothing
+}
+
+func (f *ClothingFactory) ShowStock() {
+	fmt.Println("\n服装库存：")
+	for key, clothing := range f.clothingPool {
+		fmt.Printf("Key: %s -> ", key)
+		clothing.Show()
+	}
+}
+
+// 客人
+type Customer struct {
+	name     string
+	clothing []*Clothing
+}
+
+func NewCustomer(name string) *Customer {
+	return &Customer{
+		name:     name,
+		clothing: []*Clothing{},
+	}
+}
+
+func (c *Customer) RentClothing(clothing *Clothing) {
+	fmt.Printf("%s 租了一件服装: ", c.name)
+	clothing.Show()
+	c.clothing = append(c.clothing, clothing)
+}
+
+func (c *Customer) ShowClothing() {
+	fmt.Printf("\n客人%s租赁的服装有：\n", c.name)
+	for _, cloth := range c.clothing {
+		cloth.Show()
+	}
+}
+
+func main() {
+	fmt.Println("============= 享元模式 =============")
+
+	factory := NewClothingFactory()
+
+	// 客人1租衣服
+	customer1 := NewCustomer("小红")
+	customer1.RentClothing(factory.GetClothing("连衣裙", "M", "红色"))
+	customer1.RentClothing(factory.GetClothing("牛仔裤", "L", "蓝色"))
+
+	// 客人2租衣服
+	customer2 := NewCustomer("小明")
+	customer2.RentClothing(factory.GetClothing("连衣裙", "M", "红色")) // 共享同一件连衣裙
+	customer2.RentClothing(factory.GetClothing("西裤", "S", "白色"))
+
+	fmt.Println()
+
+	// 显示租赁情况
+	customer1.ShowClothing()
+	customer2.ShowClothing()
+
+	// 显示服装库存
+	factory.ShowStock()
+
+	fmt.Println()
+	fmt.Println("=========== 享元模式结束 ===========")
+}