[AS3]AMF3+JAVA的调用范例


    amf是Adobe独家开发的数据封装格式，Flash可以直接访问，由于它是基于二进制的数据传输，所以相对于xml SOAP、json、webService等基于字符串的数据格式，有数据体积小和效率高的特点。

    amf目前有AMF0和AMF3两种格式，flash8以前版本只支持AMF0，flash9支持两种格式。AMF3比AMF0效率更高。

调试环境：
1、JDK 1.5
2、Resin 3.0
3、Flash CS3
4、flex-messaging-core.jar和flex-messaging-common.jar（这两个jar包文件可在Adobe的开源项目BlazeDS中找到）

Flash客户端代码：

/** * ... * @author Kinglong * @version 0.1 */ package project.test { import flash.display.*; import flash.events.*; import flash.net.*; import flash.utils.*; public class TestAMF extends Sprite { private var _loader:URLLoader; public function TestAMF() { trace("TestAMF"); _loader = new URLLoader(); _loader.dataFormat = URLLoaderDataFormat.BINARY; _loader.addEventListener(Event.COMPLETE, loaderHandler); _loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, loaderHandler); _loader.addEventListener(IOErrorEvent.IO_ERROR, loaderHandler); var request:URLRequest = new URLRequest("http://localhost:8080/ajax/servlet/test"); _loader.load(request); } private function loaderHandler(event:*):void { trace(event.type); switch(event.type) { case Event.COMPLETE: var start:Number=getTimer(); var byte:ByteArray = _loader.data as ByteArray; byte.uncompress(); var obj:Object = byte.readObject(); var end:Number=getTimer(); trace("耗时：" + (end - start) + "毫秒"); trace(obj.fullName); break; } } } }

Java服务端代码
import java.io.*; import java.util.HashMap; import java.util.Map; import java.util.zip.*; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import flex.messaging.io.*; import flex.messaging.io.amf.*; public class TestServlet extends HttpServlet { private static final long serialVersionUID = -1079073749217155506L; private SerializationContext context = new SerializationContext(); public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("application/x-gzip-compressed"); Amf3Output out = new Amf3Output(context); DeflaterOutputStream stream = new DeflaterOutputStream(new DataOutputStream(response.getOutputStream())); out.setOutputStream(stream); Map map = new HashMap(); String[] arr = "1,2,3,4,5".split(","); map.put("datas", arr); map.put("userName","kinglong"); map.put("fullName", "金龙工作室"); map.put("domain", "klstudio.com"); out.writeObject(map); stream.finish(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } }

因为AS3中的ByteArray支持zlib数据压缩和解压，所以我在服务端代码里增加数据压缩。

AMF3很适合Flash和后台服务端的数据交换，我写了这个范例，希望能给大家一参考。

原文地址：http://www.klstudio.com/post/168.html