public void Test()
{
Document doc = new Document();
Command display = new Display(doc);
Command undo = new Undo(doc);
Command redo = new Redo(doc);
DocumentInvoker invoker = new DocumentInvoker(display, undo, redo);
invoker.Display();
invoker.Undo();
invoker.Redo();
Console.ReadLine();
}
static void Main(string[] args)
{
//1、命令行模式的根本目的在于将“行为的请求者”和“行为的实现者”解耦；实现手段：“将行为抽象为对象”
Document doc = new Document();
DocumentCommand discmd = new DisplayCommand(doc);
DocumentCommand undcmd = new UndoCommand(doc);
DocumentCommand redcmd = new RedoCommand(doc);
DocumentInvoker invoker = new DocumentInvoker(discmd, undcmd, redcmd);
invoker.Display();
invoker.Undo();
invoker.Redo();
PatrickLiuAndWife liuAndLai = new PatrickLiuAndWife(); //命令接受者
Command command = new MakeDumplingsCommand(liuAndLai); //命令
PaPaInvoker papa = new PaPaInvoker(command); //命令请求者
papa.ExecuteCommand();
Console.ReadKey();
}