as3压缩解压缩的第三方包及实现DEMO

用到as3 解压缩zip文件.上网找了都是只能解压缩生成bytearray,而不是直接生成文件或目录结构.所以只能自己根据bytearray手动实现..

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
					   xmlns:s="library://ns.adobe.com/flex/spark"
					   xmlns:mx="library://ns.adobe.com/flex/mx"
					   creationComplete="init()">
	
	<fx:Script>
		<![CDATA[			
			import com.coltware.airxzip.*;
			import com.coltware.airxzip.ZipEntry;
			import com.coltware.airxzip.ZipError;
			import com.coltware.airxzip.ZipFileReader;
			
			import flash.utils.ByteArray;
			import flash.utils.setTimeout;
			
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			
			[Bindable]
			private var arrColl:ArrayCollection; 
			private var outputPath:String;
			private var urlVars:URLVariables;
			private var downloadFile:File;
			private var urlReq:URLRequest;   
			private const FILE_URL:String = "http://192.168.2.3/david/plugin/oldversion/2.zip";
			private var downloadPath:String;
			private function init():void
			{
				downloadFile = new File();
				arrColl = new ArrayCollection();   
				downloadFile = new File();
				downloadFile.addEventListener(Event.CANCEL, doEvent);
				downloadFile.addEventListener(Event.COMPLETE, doEvent);
				downloadFile.addEventListener(Event.SELECT, doEvent);
				downloadFile.addEventListener(HTTPStatusEvent.HTTP_STATUS, doEvent);
				downloadFile.addEventListener(IOErrorEvent.IO_ERROR, doEvent);
				downloadFile.addEventListener(ProgressEvent.PROGRESS, doEvent);
				downloadFile.addEventListener(SecurityErrorEvent.SECURITY_ERROR, doEvent);
			}
			
			protected function downloadZip(event:MouseEvent):void
			{
				urlReq = new URLRequest(FILE_URL);
				downloadFile.download(urlReq,"indesign.zip");
			}
			
			private function doEvent(evt:Event):void {
				var fl:File = evt.currentTarget as File;
				//trace(evt.type);
				switch(evt.type.toLowerCase()){
					case "complete":
						downloadPath = fl.url;
						uncompress();
						break;
					case "ioerror":
						Alert.show("网络地址错误");
						return;
						break;
				}
				/* Add event order and type to the DataGrid control. */
				arrColl.addItem({data:arrColl.length+1, type:evt.type, eventString:evt.toString()});   
				
				try {
					/* Update the Model. */
					fileRefModel.creationDate = fl.creationDate;
					fileRefModel.creator = fl.creator;
					fileRefModel.modificationDate = fl.modificationDate;
					fileRefModel.name = fl.name;
					fileRefModel.path = fl.url;
					fileRefModel.size = fl.size;
					fileRefModel.type = fl.type;
					/* Display the Text control. */
					txt.visible = true;
				} catch (err:*) {
					/* uh oh, an error of sorts. */
				}
			}
			
			private function showAlert(item:Object):void {
				Alert.show(item.eventString, item.type);
			}
			
			private function uncompress():void
			{
				var reader:ZipFileReader = unzip_init(fileRefModel.path);
				var list:Array = reader.getEntries();
				var file:File = new File();
				var path:String = fileRefModel.path as String;
				
				outputPath = path.substr(0, path.indexOf(fileRefModel.name)) + "indesign/";
				for each(var entry:ZipEntry in list){
					//创建文件
					
					if(entry.isDirectory()){
						file.url = outputPath + entry.getFilename();
						if(!file.exists)
							file.createDirectory();
						//trace("DIR  --->" + entry.getFilename());
					}
					else{
						var bytes:ByteArray = reader.unzip(entry);
						file.url = outputPath + entry.getFilename();
						
						file.resolvePath(outputPath + entry.getFilename());
						var fileStream:FileStream = new FileStream();
						fileStream.open(file, FileMode.WRITE);
						fileStream.writeBytes(bytes);
						fileStream.close();
					}
				}	
				reader.close();//关闭字节流。否则无法删除zip
				openIndesign();
				setTimeout(delZip,1000);
			}
			
			//删除 zip文件
			private function delZip():void
			{
				var zipFile:File = new File(fileRefModel.path);
				zipFile.deleteFile();
				
			}
			
			private function openIndesign():void
			{
				var file:File = new File();
				file.url = outputPath + "2/demo/staticImage.html";
				file.openWithDefaultApplication();
			}
			
			private  function unzip_init(filepath:String):ZipFileReader{
				var reader:ZipFileReader = new ZipFileReader();
				var file:File = new File(filepath);
				reader.open(file);
				return reader;
			}

		]]>
	</fx:Script>
	
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 -->
		<fx:Model id="fileRefModel">
			<file>
				<creationDate>{""}</creationDate>
				<creator>{""}</creator>
				<modificationDate>{""}</modificationDate>
				<name>{""}</name>
				<path>{""}</path>
				<size>{""}</size>
				<type>{""}</type>
			</file>
		</fx:Model>   
	</fx:Declarations>
	<s:VGroup>
		
		<s:Button id="downloadBtn" label="download" click="downloadZip(event)" toolTip="预览"/>
		<mx:DataGrid id="debug" dataProvider="{arrColl}" width="{downloadBtn.width}" rowCount="5" rowHeight="22" itemClick="showAlert(event.currentTarget.selectedItem)">
			<mx:columns>
				<mx:DataGridColumn dataField="data" headerText="#" width="20" />
				<mx:DataGridColumn dataField="type" headerText="Type" showDataTips="true" dataTipField="eventString" />
			</mx:columns>
		</mx:DataGrid>   
		<mx:Text id="txt" condenseWhite="true" visible="false">
			<mx:text>
				creationDate: {fileRefModel.creationDate}
				creator: {fileRefModel.creator}
				modificationDate: {fileRefModel.modificationDate}
				name: {fileRefModel.name}
				path: {fileRefModel.path}
				size: {fileRefModel.size}
				type: {fileRefModel.type}
			</mx:text>
		</mx:Text>   
	</s:VGroup>
	

</s:WindowedApplication>

[转]
在现在开发的游戏中，由于战斗数据比较大，所以尝试对战斗数据进行压缩，然后输出到客户端flash端再解压。

Google到一篇文章，对照翻译工具翻译一下

在我的一些项目中，经常需要对数据做一些转换操作，所以积累一些很有意思的用于数据压缩/解压缩的第三方类库。

当然ByteArray类本身就带了数据压缩和解压缩的方法，可以用在flash player使用zlib算法和AIR程序使用多种算法。在FLASH跟PHP作为后台的编程中，我后来选择了ByteArray的compress方法来做zlib算法的压缩，用这个方法用的比较顺手，而且很快。

下面是一些第三方的类库地址以及介绍：

    AS3 Zip: AS 3 下用来读取和写入zip文件的类库
    FZip: FZip 是一个用于AS 3 下读取、创建、修改zip压缩包的类库
    ASZip: AS 3 用于创建zip文件的类库
    LZMA Encoder: AS3下使用LZMA算法压缩数据的类库.
    LZMA Decoder: 跟上面类库对应的用于LZMA算法解压缩数据.
    AsCompress: AS3下 GZIP压缩和解压缩类库，好像需要SDK版本在4.x以上，flash cs3下不可用。
    Gzip for HTTPService/URLLoader: 给你的 Flex/AIR HTTPService/URLLoader增加gzip支持
    airxzip: AIR的zip类库

如果你还知道更多的类库或者其他好东东，欢迎告知！



翻译自：http://blog.yoz.sk/2011/01/quick-tip-compression-in-flash/

While working on one of my projects where I needed compression for transfered data, I hit some very interesting compression libraries. Also the ByteArray class contains compress method, using zlib algorithm in flash player or multiple algorithms in AIR. At the end I decided to useByteArray.compress() method for encoding vs. PHP gzuncompress for decoding, what works correctly, fast and smooth.

Here is a list of 3rd party compression libraries and other good stuff:

    AS3 Zip: ActionScript 3 based library for reading and writing zip files
    FZip: FZip is an Actionscript 3 class library to load, modify and create standard ZIP archives.
    ASZip: ActionScript 3 library to generate ZIP files
    LZMA Encoder: AS3 class to compress data using LZMA algorithm.
    LZMA Decoder: A part of the apparat framework.
    GZIP: ActionScript GZIP compression library
    Gzip for HTTPService/URLLoader: Adding Gzip support for Flex/AIR HTTPService/URLLoader
    airxzip: Zip library for ActionScript3 on AIR

If you know some more, please let me know.

from: http://www.cnblogs.com/rob0121/articles/2300556.html