键盘的点击与弹起：

 

Source:        
stage.addEventListener(KeyboardEvent.KEY_DOWN, xKeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP, xKeyUp);

function xKeyDown(event:KeyboardEvent):void{
        kb.text = "点击"+event.keyCode;
};

function xKeyUp(event:KeyboardEvent):void{
        kb.text = "弹起"+event.keyCode;
};


按键状态的确认：

 

Source:        
var space_flag:Boolean = false;

stage.addEventListener(KeyboardEvent.KEY_DOWN,xKeyDown);
stage.addEventListener(KeyboardEvent.KEY_UP,xKeyUp);
stage.addEventListener(Event.ENTER_FRAME,xEnterFrame);

function xKeyDown(evt:KeyboardEvent):void{
    if(evt.keyCode == Keyboard.SPACE){
        space_flag = true;
    }
}

function xKeyUp(evt:KeyboardEvent):void{
    if(evt.keyCode == Keyboard.SPACE){
        space_flag = false;
    }
}

function xEnterFrame(evt:Event):void{
    if(space_flag){
                mc.gotoAndStop(2);
        }else{
                mc.gotoAndStop(1);
    }
}                        


键盘的KeyCode表示：

 

Source:        
stage.addEventListener(KeyboardEvent.KEY_DOWN, KeyDown);

function KeyDown(evt:KeyboardEvent){                                                                                                          
        code_text.text                 = String(evt.keyCode);
        location_text.text         = String(evt.keyLocation);
        ctrl_text.text                 = String(evt.ctrlKey);
        shift_text.text                 = String(evt.shiftKey);
        alt_text.text                 = String(evt.altKey);
}

键盘的KeyCode一览

Ａ〜Ｚ、０〜９键盘KeyCode一览表

键	keyCode
0	48
1	49
2	50
3	51
4	52
5	53
6	54
7	55
8	56
9	57
A	65
B	66
C	67
D	68
E	69
F	70
G	71
H	72
I	73
J	74
K	75
L	76
M	77
N	78
O	79
P	80
Q	81
R	82
S	83
T	84
U	85
V	86
W	87
X	88
Y	89
Z	90

小键盘的KeyCode

键	keyCode
0	96
1	97
2	98
3	99
4	100
5	101
6	102
7	103
8	104
9	105
*	106
+	107
Enter	108
-	109
.	110
/	111

F1～F15键盘KeyCode

键	keyCode
F1	112
F2	113
F3	114
F4	115
F5	116
F6	117
F7	118
F8	119
F9	120
F10	121
F11	122
F12	123
F13	124
F14	125
F15	126

其他键的KeyCode

键	keyCode
BackSpace	8
Tab	9
Clear	12
Enter	13
Shift	16
Ctrl	17
Alt	18
CapsLock	20
Esc	27
Space	32
PageUp	33
PageDown	34
End	35
Home	36
← (左)	37
↑ (上)	38
→ (右)	39
↓ (下)	40
Insert	45
Delete	46
Help	47
NumLock	144
: *	186
; +	187
- =	189
/ ?	191
@ `	192
[ {	219
\ |	220
] }	221
" '	222

KeyCode定数一览表：

键	定数
BackSpace	Keyboard.BACKSPACE
CapsLock	Keyboard.CAPS_LOCK
Control	Keyboard.CONTROL
Delete	Keyboard.DELETE
End	Keyboard.END
Enter	Keyboard.ENTER
Escape	Keyboard.ESCAPE
F1	Keyboard.F1
F2	Keyboard.F2
F3	Keyboard.F3
F4	Keyboard.F4
F5	Keyboard.F5
F6	Keyboard.F6
F7	Keyboard.F7
F8	Keyboard.F8
F9	Keyboard.F9
F10	Keyboard.F10
F11	Keyboard.F11
F12	Keyboard.F12
F13	Keyboard.F13
F14	Keyboard.F14
F15	Keyboard.F15
Home	Keyboard.HOME
Insert	Keyboard.INSERT
NUMPAD 0	Keyboard.NUMPAD_0
NUMPAD 1	Keyboard.NUMPAD_1
NUMPAD 2	Keyboard.NUMPAD_2
NUMPAD 3	Keyboard.NUMPAD_3
NUMPAD 4	Keyboard.NUMPAD_4
NUMPAD 5	Keyboard.NUMPAD_5
NUMPAD 6	Keyboard.NUMPAD_6
NUMPAD 7	Keyboard.NUMPAD_7
NUMPAD 8	Keyboard.NUMPAD_8
NUMPAD 9	Keyboard.NUMPAD_9
NUMPAD +	Keyboard.NUMPAD_ADD
NUMPAD .	Keyboard.NUMPAD_DECIMAL
NUMPAD /	Keyboard.NUMPAD_DIVIDE
NUMPAD Enter	Keyboard.NUMPAD_ENTER
NUMPAD *	Keyboard.NUMPAD_MULTIPLY
NUMPAD -	Keyboard.NUMPAD_SUBTRACT
Page Up	Keyboard.PAGE_UP
Page Down	Keyboard.PAGE_DOWN
Arrow Up	Keyboard.UP
Arrow Down	Keyboard.DOWN
Arrow Left	Keyboard.LEFT
Arrow Right	Keyboard.RIGHT
Shift	Keyboard.SHIFT
Space	Keyboard.SPACE
Tab	Keyboard.TAB

源文件放在附件里面了，应该可以下载。在我的blog不下载也能看到效果。http://www.fastso.org/Lab/keyboard.html  如果有高手偶然误入请指点一二再走～

附件下载：
 keyboard_00_as3.rar
keyboard_01_as3.rar
keyboard_02_as3.rar

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