由于现在大多数所谓flex项目都是嵌入在web中的， 所以， 经常需要与web的session与cookie通信。我们是将swf嵌入到一个iframek中， 由swf去读 cookie以保证有效性。
Flex通过javascript读写cookie 方式如下
最近遇到个问题，开发web项目的时候，可能flex只用来实现项目的部分模块。当flex需要在客户端写入/读取一些状态信息的时候，我们会想到用cookie。flex是不支持cookie的，只有SharedObject这个本地对象。所以解决的办法就有两个：
1.flex通过调用js来实现对cookie的操作；
2.js通过flex实现对SharedObject的操作；
这两种方法的基础就是实现flex和javascript的交互，自己试着写了个小例子，实现了第一种方法，直接上代码：
Flex_Js_Cookie.js：
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01.function SetCookie(name,value)
02.{
03. document.cookie = name+"="+escape(value);
04.};
05.function GetCookie(name)
06.{
07. var arr = document.cookie.match(new RegExp("(^|)"+name+"=([^;]*)(;|$)"));
08. alert(arr.length);
09. if(arr != null)
10. {
11. return unescape(arr[2]);
12. }
13.}
function SetCookie(name,value)
{
document.cookie = name+"="+escape(value);
};
function GetCookie(name)
{
var arr = document.cookie.match(new RegExp("(^|)"+name+"=([^;]*)(;|$)"));
alert(arr.length);
if(arr != null)
{
return unescape(arr[2]);
}
}
Flex_Js_Cookie.html：
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01.<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
02.<html xmlns="http://www.w3.org/1999/xhtml">
03.<head>
04.<head>
05.<title></title>
06.<script src="swfobject.js" type="text/javascript"></script>
07.<script src="Flex_Js_Cookie.js" type="text/javascript"></script>
08.<script language=javascript>
09.var flashvars = {};
10. var params = {
11. menu: "false",
12. scale: "noScale",
13. allowFullscreen: "true",
14. allowScriptAccess: "always",
15. bgcolor: "#FFFFFF"
16. };
17. var attributes = {id:"swfplayer"};
18. swfobject.embedSWF("Flex_Js_Cookie.swf","swfplayer","500","350","9.0.0","expressInstall.swf",flashvars,params,attributes);
19.</script>
20.</head>
21.<body>
22.<div id="swfplayer"></div>
23.</body>
24.</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<head>
<title></title>
<script src="swfobject.js" type="text/javascript"></script>
<script src="Flex_Js_Cookie.js" type="text/javascript"></script>
<script language=javascript>
var flashvars = {};
var params = {
menu: "false",
scale: "noScale",
allowFullscreen: "true",
allowScriptAccess: "always",
bgcolor: "#FFFFFF"
};
var attributes = {id:"swfplayer"};
swfobject.embedSWF("Flex_Js_Cookie.swf",attributes);
</script>
</head>
<body>
<div id="swfplayer"></div>
</body>
</html>
Flex_Js_Cookie.mxml：
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01.<?xml version="1.0" encoding="utf-8"?>
02.<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
03. <mx:Script>
04. <![CDATA[
05. import flash.external.*;
06. import mx.controls.Alert;
07.
08. public function GetCookie():void
09. {
10. var jsFunction:String = "GetCookie";
11. var key:String = txt_key.text;
12. if(ExternalInterface.available)
13. {
14. var value:String = ExternalInterface.call(jsFunction,key);
15. txt_value.text = value;
16. }
17. }
18.
19. public function SetCookie():void
20. {
21. var jsFunction:String = "SetCookie";
22. var key:String = txt_key_set.text;
23. var value:String = txt_value_set.text;
24. if(ExternalInterface.available)
25. {
26. ExternalInterface.call(jsFunction,key,value);
27. }
28. }
29. ]]>
30. </mx:Script>
31. <mx:Label x="51" y="39" text="cookie名：" fontSize="12"/>
32. <mx:Label x="51" y="86" text="cookie值：" fontSize="12"/>
33. <mx:TextInput x="122" y="39" id="txt_key"/>
34. <mx:Button x="301" y="84" label="确定" fontSize="12" click="GetCookie()"/>
35. <mx:TextInput x="122" y="86" id="txt_value" enabled="false"/>
36. <mx:Label x="51" y="183" text="cookie名：" fontSize="12"/>
37. <mx:Label x="51" y="226" text="cookie值：" fontSize="12"/>
38. <mx:TextInput x="122" y="183" id="txt_key_set"/>
39. <mx:TextInput x="122" y="226" id="txt_value_set"/>
40. <mx:Button x="301" y="226" label="确定" fontSize="12" click="SetCookie()"/>
41. <mx:Label x="51" y="155" text="设置cookie" fontSize="12" color="#C42A2A"/>
42. <mx:Label x="51" y="11" text="取得cookie" fontSize="12" color="#C42A2A"/>
43.
44.</mx:Application>
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
<![CDATA[
import flash.external.*;
import mx.controls.Alert;
public function GetCookie():void
{
var jsFunction:String = "GetCookie";
var key:String = txt_key.text;
if(ExternalInterface.available)
{
var value:String = ExternalInterface.call(jsFunction,key);
txt_value.text = value;
}
}
public function SetCookie():void
{
var jsFunction:String = "SetCookie";
var key:String = txt_key_set.text;
var value:String = txt_value_set.text;
if(ExternalInterface.available)
{
ExternalInterface.call(jsFunction,value);
}
}
]]>
</mx:Script>
<mx:Label x="51" y="39" text="cookie名：" fontSize="12"/>
<mx:Label x="51" y="86" text="cookie值：" fontSize="12"/>
<mx:TextInput x="122" y="39" id="txt_key"/>
<mx:Button x="301" y="84" label="确定" fontSize="12" click="GetCookie()"/>
<mx:TextInput x="122" y="86" id="txt_value" enabled="false"/>
<mx:Label x="51" y="183" text="cookie名：" fontSize="12"/>
<mx:Label x="51" y="226" text="cookie值：" fontSize="12"/>
<mx:TextInput x="122" y="183" id="txt_key_set"/>
<mx:TextInput x="122" y="226" id="txt_value_set"/>
<mx:Button x="301" y="226" label="确定" fontSize="12" click="SetCookie()"/>
<mx:Label x="51" y="155" text="设置cookie" fontSize="12" color="#C42A2A"/>
<mx:Label x="51" y="11" text="取得cookie" fontSize="12" color="#C42A2A"/>
</mx:Application>
同时，我们还使用了blazeDS，使用了remoteObject与java进行通信。 所以经blazeDS后，在java端对session及cookie 操作如下
public HttpServletRequest request;
public HttpServletResponse response;
public FlexSession flexSession;
public HttpSession session;
request = FlexContext.getHttpRequest(); session = request.getSession(); session.setAttribute("userId",uid); session.setAttribute("title",role); response = FlexContext.getHttpResponse(); addCookie(response,"userId",String.valueOf(uid)); addCookie(response,"title",role);
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