[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;
            }
        }
    }

}

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




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




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。