servlet 使用AMF3和flash通讯

最新推荐文章于 2021-02-12 21:43:20 发布

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本文详细介绍了如何通过 Java Servlet 使用 AMF3 协议进行基于 HTTP 的数据传输至 AS3 客户端。包括 JSP 输出文本与 AMF3 协议不兼容的问题解决、Java Servlet 功能的优势以及具体代码实现。同时，提供了 AS3 客户端的加载与解析方法。

经过多次研究，终于实现了JAVA servlet 用AMF3协议基于http到as3的数据传输。

因为JSP输出文本，而AMF3协议是二进制流，所以JSP是做不出来的.

servlet中可以实现，servlet功能也能够满足服务器构架需求，甚至用servlet更好.

------------------------------java servlet代码----------------------------------------：

package tool;

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 amf3 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"); //JAVA ZIP
        DeflaterOutputStream stream = new DeflaterOutputStream(new DataOutputStream(response.getOutputStream())); //JAVA ZIP
  Amf3Output out = new Amf3Output(context); //AMF3
        out.setOutputStream(stream);

  HashMap map = new HashMap();
  map.put("stat","1");
        map.put("msg", "对象坐标");
  String[] arr = "1,2,3,4,5".split(",");
        map.put("datas", arr);

out.writeObject(map);
stream.finish();

}

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
        doPost(request, response);
    }

}

--------------as3客户端代码-------------------------

public static function amf():void
  {

      var urlvar:URLVariables = new URLVariables();

             var ur:URLRequest = new URLRequest();
                 ur.url = "http://190.75.33.71/hj/amf3";
                 ur.data = urlvar;
                 ur.method = URLRequestMethod.POST;

             var ul:URLLoader = new URLLoader();

             ul.dataFormat = URLLoaderDataFormat.BINARY; //注意要搞成BIN格式
                 ul.addEventListener(Event.COMPLETE, amf_loadcomplete);
                 ul.load(ur);
        }

        public static function amf_loadcomplete(evt:Event):void
            {
                var byte:ByteArray = evt.target.data as ByteArray;
                byte.uncompress(); //解压
         var obj:Object = byte.readObject();
          main.txt.setText(obj.datas);
            }