45 lines
1000 B
Go
45 lines
1000 B
Go
package main
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/*
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实例
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汤宝宝混穿到了泰拉世界，并成为了泰拉联邦的唯一统治者。人类只有一个帝皇！
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*/
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import (
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"fmt"
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"sync"
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)
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// 帝皇类
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type Emperor struct {
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Name string
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}
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var emperorInstance *Emperor
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var once sync.Once
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// 获取帝皇实例的函数
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func GetEmperorInstance(name string, announce string) *Emperor {
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fmt.Println(announce)
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once.Do(func() {
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emperorInstance = &Emperor{Name: name}
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})
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return emperorInstance
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}
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func main() {
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fmt.Println("========= 单例模式 =========")
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// 获取帝皇实例
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emperor1 := GetEmperorInstance("汤宝宝", "泰拉联邦的帝皇诞生了!")
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fmt.Printf("帝皇的名字是：%s！\n", emperor1.Name)
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emperor2 := GetEmperorInstance("王二狗", "泰拉联邦的帝皇又一次诞生了!")
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fmt.Printf("帝皇的名字是：%s！\n", emperor2.Name)
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if emperor1 == emperor2 {
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fmt.Printf("泰拉只有一个帝皇：%s！\n\n", emperor1.Name)
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}
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fmt.Println("======= 单例模式结束 =======")
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}
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