public void addHandler(Handler2 handler)
{
//设置handle
handler.setSuccessor(null);
Console.WriteLine($"head_set:{handler}");
if (head == null)
{
head = handler;
tail = handler;
return;
}
//设置tail(尾巴)
tail.setSuccessor(handler);
tail = handler;
Console.WriteLine($"tail_set:{handler}");
}
public void setSuccessor(Handler2 successor)
{
this.successor = successor;
}