public void Acknowledge()
{
if (state.GetType() == typeof(Established))
{
state = new Listening();
}
else
{
Console.WriteLine("状态不对，不继续执行");
}
state.Acknowledge();
}
public void Close()
{
if (state.GetType() == typeof(Listening))
{
state = new Closed();
}
else
{
Console.WriteLine("状态不对，不继续执行");
}
state.Close();
}
public void Open()
{
if (state == null)
{
state = new Established();
}
else
{
Console.WriteLine("状态不对，不继续执行");
}
state.Open();
}