抽出flash与java 用AMF交互代码

最近做的一个java与flash通讯的项目,由于项目框架的需要,要把AMF格式解析代码抽出.代码有点乱,现丑了.

 

package com.musicxx.web.servlet;



import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import juan.framework.action.Action4J;
import juan.framework.arguments.ArgumentsFactory;
import juan.framework.arguments.IArguments;
import juan.view.context.IContext;
import juan.view.context.impl.InnerContextImpl;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import flex.messaging.io.SerializationContext;
import flex.messaging.io.amf.ActionMessage;
import flex.messaging.io.amf.Amf0Input;
import flex.messaging.io.amf.Amf0Output;
import flex.messaging.io.amf.Java15Amf0Output;
import flex.messaging.io.amf.MessageBody;
import flex.messaging.io.amf.MessageHeader;



/**
 * Description : AMF通讯方式
 * 
 * @author: JayChou
 * @version 1.0
 * @Created on Aug 18, 2008 5:57:21 PM
 */
public class AmfServlet extends HttpServlet  {
 private static Log logger = LogFactory.getLog(AmfServlet.class);
    /**
     * flash-->java
     * @return
     * @throws IOException 
     * @throws ClassNotFoundException 
     * @throws Exception
     */
    private ActionMessage in(InputStream is) throws IOException, ClassNotFoundException {
        ActionMessage inMs = new ActionMessage();
        Amf0Input amfIn = new Amf0Input(SerializationContext.getSerializationContext());
        amfIn.setInputStream(is);
        int version = amfIn.readUnsignedShort();
        inMs.setVersion(version);

        int headerCount = amfIn.readUnsignedShort();
        for (int i = 0; i < headerCount; ++i) {
            MessageHeader header = new MessageHeader();
            inMs.addHeader(header);
            header.setName(amfIn.readUTF());
            header.setMustUnderstand(amfIn.readBoolean());
            amfIn.readInt();
            amfIn.reset();
            header.setData(amfIn.readObject());
        }

        int bodyCount = amfIn.readUnsignedShort();
        for (int i = 0; i < bodyCount; ++i) {
            MessageBody body = new MessageBody();
            inMs.addBody(body);
            body.setTargetURI(amfIn.readUTF());
            body.setResponseURI(amfIn.readUTF());
            amfIn.readInt();
            amfIn.reset();
            body.setData(amfIn.readObject());
        }

        amfIn.close();
        amfIn=null;
        
        return inMs;
    }

    /**
     * java --> flash
     * @param o
     * @throws IOException 
     * @throws Exception
     */
    private void out(ActionMessage outMs,HttpServletRequest request, HttpServletResponse response) throws IOException {
        ByteArrayOutputStream outBuffer = new ByteArrayOutputStream();  
        
        Amf0Output amfOut = new Java15Amf0Output(SerializationContext.getSerializationContext());
        int version = outMs.getVersion();
        amfOut.setAvmPlus(version > 0);
        amfOut.setOutputStream(outBuffer);
        amfOut.writeShort(version);

        int headerCount = outMs.getHeaderCount();
        amfOut.writeShort(headerCount);
        for (int i = 0; i < headerCount; ++i) {
            MessageHeader header = outMs.getHeader(i);
            amfOut.writeUTF(header.getName());
            amfOut.writeBoolean(header.getMustUnderstand());
            amfOut.writeInt(-1);
            amfOut.reset();
            amfOut.writeObject(header.getData());
        }

        int bodyCount = outMs.getBodyCount();
        amfOut.writeShort(bodyCount);
        for (int i = 0; i < bodyCount; ++i) {
            MessageBody body = outMs.getBody(i);
            if (body.getTargetURI() == null)
                amfOut.writeUTF("null");
            else
                amfOut.writeUTF(body.getTargetURI());
            if (body.getResponseURI() == null)
                amfOut.writeUTF("null");
            else
                amfOut.writeUTF(body.getResponseURI());
            amfOut.writeInt(-1);
            amfOut.reset();
            amfOut.writeObject(body.getData());
        }

        response.setContentType(request.getContentType());
        response.setContentLength(outBuffer.size());
        outBuffer.writeTo(response.getOutputStream());
        response.flushBuffer();
        amfOut.flush();
        amfOut.close();
        amfOut=null;
    }
    
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        Action4J action = new Action4J();
        IContext icontext = new InnerContextImpl();
        IArguments args = ArgumentsFactory.getArguments();
        
        action.setContext(icontext);
        action.setRequest(req);
        action.setResponse(resp);
        action.setServletConfig(getServletConfig());
        action.setServletContext(getServletContext());
        
        ActionMessage outMs = new ActionMessage();
        ActionMessage inMs = null;
        try {
         inMs = in(req.getInputStream());
            outMs.setVersion(inMs.getVersion());
            
            for(int i=0;i