现在做的这个Flex项目需要进行国际化，这里总结一下
和java一样，Flex2也可以使用.properties文件实现国际化，使用flex的mx.resources.ResourceBundle类来读取properties文件。同样也可以在Flex Builder2中安装Properties Editor插件来写properties文件。
1.创建一个Flex项目
2.在这个项目中创建 locale 文件夹
3.在 locale 文件夹中添加2个properties文件，如下
en_US.properties
- label1=Hello World!
- label2=Welcome!
zh_CN.properties
- label1=\u5927\u5bb6\u597d\uff01
- label2=\u6b22\u8fce\uff01
4.将 locale 文件夹添加为flex项目的source path (两个方法)
a)右击项目 -> properties -> Flex Compiler -> 在additional compiler arguments中添加 -sp locale
b)右击项目 -> properties -> Flex Build Path -> Source path -> add Folder -> 选中locale文件夹即可
现在开始写代码了
- package util {
-
- import flash.events.EventDispatcher;
- import flash.events.IEventDispatcher;
- import flash.events.Event;
- import mx.resources.ResourceBundle;
-
- public class Localizator extends EventDispatcher {
-
-
- private static var _instance : Localizator;
-
- private var _language : String;
-
-
- [ResourceBundle("en_US")]
- private var lang_en_US:ResourceBundle;
-
- [ResourceBundle("zh_CN")]
- private var lang_zh_CN:ResourceBundle;
-
- [Bindable]
- private var currRes:ResourceBundle;
-
- public function Localizator(language : String = "en_US") {
- selectLanguage(language);
- }
-
- public static function getInstance(language : String = "en_US"):Localizator {
- if (_instance == null) {
- _instance = new Localizator(language);
- }
- return _instance;
- }
-
- private function selectLanguage(language : String):void {
- this._language = language;
-
- if (_language == "en_US") {
- this.currRes = lang_en_US;
- } else if (_language == "zh_CN") {
- this.currRes = lang_zh_CN;
- } else {
- this.currRes = lang_en_US;
- }
- }
-
- [Bindable(event="languageChange")]
- public function getText(key:String):String {
- return this.currRes.getString(key);
- }
-
- public function get language():String {
- return this._language;
- }
-
- public function set language(language : String):void {
- if (this._language != language) {
- selectLanguage(language);
- dispatchEvent(new Event("languageChange"));
- }
- }
- }
- }
主程序代码
- <?xml version="1.0" encoding="utf-8"?>
- <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
-
- <mx:Script>
- [CDATA[
- import util.Localizator;
-
- [Bindable]
- private var localizator : Localizator = Localizator.getInstance();
-
- private function changeLanguage(language:String):void {
- localizator.language = language;
- }
-
- ]]
- </mx:Script>
-
- <mx:Label id="label1" x="10" y="10" text="{localizator.getText('label1')}" width="152" height="20" fontSize="12" fontWeight="bold"/>
- <mx:Label id="label2" x="10" y="38" text="{localizator.getText('label2')}" width="144" height="22" fontSize="12" fontWeight="bold"/>
-
- <mx:Button x="10" y="68" label="Chinese" click="changeLanguage('zh_CN')"/>
- <mx:Button x="88" y="68" label="English" click="changeLanguage('en_US')"/>
-
-
- </mx:Application>
OK,编译运行就可以看到结果了。
另外有些问题需要说明
1.properties文件须使用UTF-8编码
2.(Flex supports static inclusion of localized resources, but not dynamic retrieval of resources at run time.) Flex2是将properties文件编译到swf文件中的，目前还不支持动态读取外部properties文件
3.如果保存或编译代码时，遇到Unable to resolve a class for ResourceBundle: en_US_properties问题，大可放心，这是Flex Builder2的bug，只需要在main menu(顶部菜单)中选 Project -> Clean... 就可以了。或者将上面的Localizator.as随便空一行再保存编译一下，这个error也会消失，呵呵。
参考
Flex 2 Developer's Guide -> Localizing Flex Applications
http://flexme.wordpress.com/2007/07/11/internationalization-in-flex/
http://www.deitte.com/archives/2006/10/using_resource.htm
http://www.zhuoqun.net/article.asp?id=267
