Flex通过javascript读写cookie
2010-12-27 10:33
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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：
flex通过调用js来实现对cookie的操作；
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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function SetCookie(name,value)
{
document.cookie = name+"="+escape(value);
};
function GetCookie(name)
{
var arr = document.cookie.match(new RegExp("(^|)"+name+"=([^;]*)(;|$)"));
alert(arr.length);
if(arr != null)
{
return unescape(arr[2]);
}
}
function SetCookie(name,value)
{
document.cookie = name+"="+escape(value);
};
function GetCookie(name)
{
var arr = document.cookie.match(new RegExp("(^|)"+name+"=([^;]*)(;|$)"));
alert(arr.length);
if(arr != null)
{
return unescape(arr[2]);
}
}
Flex_Js_Cookie.html：
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<!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", "swfplayer", "500", "350", "9.0.0", "expressInstall.swf", flashvars, params, attributes);
</script>
</head>
<body>
<div id="swfplayer"></div>
</body>
</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", "swfplayer", "500", "350", "9.0.0", "expressInstall.swf", flashvars, params, attributes);
</script>
</head>
<body>
<div id="swfplayer"></div>
</body>
</html>
Flex_Js_Cookie.mxml：
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<?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,key,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>
<?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,key,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>
通过代码，会发现在html文件里面使用了swfobject.js这个文件，这是一个第三方发布的工具包，方便我们在页面中使用flash，下载地址是：http://code.google.com/p/swfobject/downloads/list。只要里面的js文件。
mxml文件要预先编译成swf文件。然后一起部署到tomcat下就可以运行了。
flex通过调用js来实现对cookie的操作；
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：
view plaincopy to clipboardprint?
function SetCookie(name,value)
{
document.cookie = name+"="+escape(value);
};
function GetCookie(name)
{
var arr = document.cookie.match(new RegExp("(^|)"+name+"=([^;]*)(;|$)"));
alert(arr.length);
if(arr != null)
{
return unescape(arr[2]);
}
}
function SetCookie(name,value)
{
document.cookie = name+"="+escape(value);
};
function GetCookie(name)
{
var arr = document.cookie.match(new RegExp("(^|)"+name+"=([^;]*)(;|$)"));
alert(arr.length);
if(arr != null)
{
return unescape(arr[2]);
}
}
Flex_Js_Cookie.html：
view plaincopy to clipboardprint?
<!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", "swfplayer", "500", "350", "9.0.0", "expressInstall.swf", flashvars, params, attributes);
</script>
</head>
<body>
<div id="swfplayer"></div>
</body>
</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", "swfplayer", "500", "350", "9.0.0", "expressInstall.swf", flashvars, params, attributes);
</script>
</head>
<body>
<div id="swfplayer"></div>
</body>
</html>
Flex_Js_Cookie.mxml：
view plaincopy to clipboardprint?
<?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,key,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>
<?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,key,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>
通过代码，会发现在html文件里面使用了swfobject.js这个文件，这是一个第三方发布的工具包，方便我们在页面中使用flash，下载地址是：http://code.google.com/p/swfobject/downloads/list。只要里面的js文件。
mxml文件要预先编译成swf文件。然后一起部署到tomcat下就可以运行了。
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