AMF3+JAVA的调用范例

[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 ;
             }
         }
     }

 }

/** * ... * @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);
     }
 }

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。