实现命令模式示例，添加接收者、命令及传令官类，增强代码可读性
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IvisTang
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package main
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import "fmt"
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/*
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实例：
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汤宝宝成为一国之王，手下有一个传令官和三个大臣，分别是内政大臣、外交大臣和军事大臣。
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有一天，汤宝宝想要发布一个命令，传令官负责将命令传达给大臣们，大臣们根据命令的内容决定是否执行。
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*/
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// 接收者接口
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type Receiver interface {
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perform()
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abort()
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}
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// 内政大臣
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type HomeSecretary struct {
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isPerforming bool
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}
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func (h *HomeSecretary) perform() {
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h.isPerforming = true
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fmt.Println("内政大臣开始执行命令")
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}
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func (h *HomeSecretary) abort() {
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h.isPerforming = false
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fmt.Println("内政大臣取消执行命令")
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}
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// 外交大臣
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type ForeignSecretary struct {
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isPerforming bool
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}
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func (f *ForeignSecretary) perform() {
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f.isPerforming = true
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fmt.Println("外交大臣开始执行命令")
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}
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func (f *ForeignSecretary) abort() {
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f.isPerforming = false
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fmt.Println("外交大臣取消执行命令")
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}
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// 军事大臣
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type DefenseSecretary struct {
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isPerforming bool
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}
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func (d *DefenseSecretary) perform() {
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d.isPerforming = true
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fmt.Println("军事大臣开始执行命令")
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}
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func (d *DefenseSecretary) abort() {
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d.isPerforming = false
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fmt.Println("军事大臣取消执行命令")
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}
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// 命令接口
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type Command interface {
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execute()
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}
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// 执行命令
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type PerformCommand struct {
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receiver Receiver
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}
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func (c *PerformCommand) execute() {
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c.receiver.perform()
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}
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// 取消命令
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type AbortCommand struct {
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receiver Receiver
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}
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func (c *AbortCommand) execute() {
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c.receiver.abort()
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}
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// Invoker - 传令官
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type Herald struct {
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commands []Command
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}
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func (h *Herald) addCommand(command Command) {
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h.commands = append(h.commands, command)
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}
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func (h *Herald) executeCommands() {
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for _, command := range h.commands {
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command.execute()
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}
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h.commands = []Command{} // 清空命令列表
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}
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func main() {
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fmt.Println("========= 命令模式 =========")
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// 创建接收者
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homeSecretary := &HomeSecretary{}
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foreignSecretary := &ForeignSecretary{}
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defenseSecretary := &DefenseSecretary{}
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// 创建命令
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performHomeCommand := &PerformCommand{receiver: homeSecretary}
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abortHomeCommand := &AbortCommand{receiver: homeSecretary}
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performForeignCommand := &PerformCommand{receiver: foreignSecretary}
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abortForeignCommand := &AbortCommand{receiver: foreignSecretary}
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performDefenseCommand := &PerformCommand{receiver: defenseSecretary}
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abortDefenseCommand := &AbortCommand{receiver: defenseSecretary}
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// 创建传令官
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herald := &Herald{}
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// 添加命令
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herald.addCommand(performHomeCommand)
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herald.addCommand(performForeignCommand)
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herald.addCommand(performDefenseCommand)
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// 执行命令
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herald.executeCommands()
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// 取消命令
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herald.addCommand(abortHomeCommand)
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herald.addCommand(abortForeignCommand)
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herald.addCommand(abortDefenseCommand)
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// 执行取消命令
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herald.executeCommands()
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fmt.Println()
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fmt.Println("======= 命令模式结束 =======")
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}
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@ -0,0 +1,147 @@
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"""
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实例：
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汤宝宝成为一国之王，手下有一个传令官和三个大臣，分别是内政大臣、外交大臣和军事大臣。
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有一天，汤宝宝想要发布一个命令，传令官负责将命令传达给大臣们，大臣们根据命令的内容决定是否执行。
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"""
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from abc import ABC, abstractmethod
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# 接收者接口
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class Receiver(ABC):
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@abstractmethod
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def perform(self):
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pass
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def abort(self):
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pass
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# 内政大臣
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class HomeSecretary(Receiver):
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is_performing: bool
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def __init__(self):
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self.is_performing = False
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def perform(self):
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self.is_performing = True
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print("内政大臣开始执行命令")
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def abort(self):
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self.is_performing = False
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print("内政大臣取消执行命令")
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# 外交大臣
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class ForeignSecretary(Receiver):
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is_performing: bool
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def __init__(self):
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self.is_performing = False
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def perform(self):
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self.is_performing = True
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print("外交大臣开始执行命令")
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def abort(self):
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self.is_performing = False
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print("外交大臣取消执行命令")
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# 军事大臣
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class DefenseSecretary(Receiver):
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is_performing: bool
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def __init__(self):
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self.is_performing = False
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def perform(self):
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self.is_performing = True
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print("军事大臣开始执行命令")
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def abort(self):
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self.is_performing = False
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print("军事大臣取消执行命令")
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# 命令接口
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class Command(ABC):
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@abstractmethod
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def execute(self):
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pass
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# 执行命令
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class performCommand(Command):
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receiver: Receiver
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def __init__(self, receiver: Receiver):
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self.receiver = receiver
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def execute(self):
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self.receiver.perform()
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# 取消命令
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class abortCommand(Command):
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receiver: Receiver
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def __init__(self, receiver: Receiver):
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self.receiver = receiver
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def execute(self):
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self.receiver.abort()
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# 传令官
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class Herald:
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commands: list[Command]
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def __init__(self):
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self.commands = []
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def addCommand(self, command: Command):
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self.commands.append(command)
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def executeCommands(self):
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for command in self.commands:
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command.execute()
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self.commands.clear()
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if __name__ == "__main__":
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print("========= 命令模式 =========")
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# 创建接收者
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home_secretary = HomeSecretary()
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foreign_secretary = ForeignSecretary()
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defense_secretary = DefenseSecretary()
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# 创建命令
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perform_home_command = performCommand(home_secretary)
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perform_foreign_command = performCommand(foreign_secretary)
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perform_defense_command = performCommand(defense_secretary)
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abort_home_command = abortCommand(home_secretary)
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abort_foreign_command = abortCommand(foreign_secretary)
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abort_defense_command = abortCommand(defense_secretary)
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# 创建传令官
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herald = Herald()
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# 添加执行命令
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herald.addCommand(perform_home_command)
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herald.addCommand(perform_foreign_command)
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herald.addCommand(perform_defense_command)
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# 执行命令
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herald.executeCommands()
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# 添加取消命令
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herald.addCommand(abort_home_command)
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herald.addCommand(abort_foreign_command)
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herald.addCommand(abort_defense_command)
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# 执行取消命令
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herald.executeCommands()
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print("\n======= 命令模式结束 =======")
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@ -0,0 +1,148 @@
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/*
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实例：
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汤宝宝成为一国之王，手下有一个传令官和三个大臣，分别是内政大臣、外交大臣和军事大臣。
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有一天，汤宝宝想要发布一个命令，传令官负责将命令传达给大臣们，大臣们根据命令的内容决定是否执行。
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*/
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// 接收者接口
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interface Receiver {
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perform(): void;
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abort(): void;
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}
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// 具体接收者：内政大臣
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class HomeSecretary implements Receiver {
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isPerforming: boolean;
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constructor() {
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this.isPerforming = false;
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}
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perform(): void {
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this.isPerforming = true;
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console.log("内政大臣开始执行命令");
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}
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abort(): void {
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this.isPerforming = false;
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console.log("内政大臣取消执行命令");
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}
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}
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// 具体接收者：外交大臣
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class ForeignSecretary implements Receiver {
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isPerforming: boolean;
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constructor() {
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this.isPerforming = false;
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}
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perform(): void {
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this.isPerforming = true;
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console.log("外交大臣开始执行命令");
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}
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abort(): void {
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this.isPerforming = false;
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console.log("外交大臣取消执行命令");
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}
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}
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// 具体接收者：军事大臣
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class MilitarySecretary implements Receiver {
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isPerforming: boolean;
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constructor() {
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this.isPerforming = false;
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}
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perform(): void {
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this.isPerforming = true;
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console.log("军事大臣开始执行命令");
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}
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abort(): void {
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this.isPerforming = false;
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console.log("军事大臣取消执行命令");
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}
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}
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// 命令接口
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interface Command {
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execute(): void;
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}
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// 执行命令
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class PerformCommand implements Command {
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receiver: Receiver;
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constructor(receiver: Receiver) {
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this.receiver = receiver;
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}
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execute(): void {
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this.receiver.perform();
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}
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}
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// 取消命令
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class AbortCommand implements Command {
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receiver: Receiver;
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constructor(receiver: Receiver) {
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this.receiver = receiver;
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}
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execute(): void {
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this.receiver.abort();
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}
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}
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// 传令官
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class Herald {
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private commands: Command[] = [];
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addCommand(command: Command): void {
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this.commands.push(command);
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}
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executeCommands(): void {
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for (const command of this.commands) {
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command.execute();
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}
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this.commands = []; // 执行完后清空命令列表
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}
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}
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(function () {
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console.log("======= 命令模式开始 =======");
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// 创建接收者
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const homeSecretary = new HomeSecretary();
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const foreignSecretary = new ForeignSecretary();
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const defenseSecretary = new MilitarySecretary();
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// 创建命令
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const performHomeCommand = new PerformCommand(homeSecretary);
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const abortHomeCommand = new AbortCommand(homeSecretary);
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const performForeignCommand = new PerformCommand(foreignSecretary);
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const abortForeignCommand = new AbortCommand(foreignSecretary);
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const performDefenseCommand = new PerformCommand(defenseSecretary);
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const abortDefenseCommand = new AbortCommand(defenseSecretary);
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// 创建传令官
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const herald = new Herald();
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// 添加命令
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herald.addCommand(performHomeCommand);
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herald.addCommand(performForeignCommand);
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herald.addCommand(performDefenseCommand);
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// 执行命令
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herald.executeCommands();
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// 取消命令
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herald.addCommand(abortHomeCommand);
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herald.addCommand(abortForeignCommand);
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herald.addCommand(abortDefenseCommand);
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// 执行取消命令
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herald.executeCommands();
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console.log("\n======= 命令模式结束 =======");
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})();
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