Flex的socket与java使用amf3进行通信

amf3,adobe创立的数据格式由于使用二进制,没有了xml等冗余的字符数据量会少很多!而且很多测试报告均测出amf传递效果很高.

这次是使用Flex的Socket类与java的服务端进行通信,

步骤是:

客户端用socket类连接java服务器,
使用查询字符串进行请求,
java将数据封装为hashmap,最后将hashmap用amfoutputstream输出至flex的客户端
flex对数据进行解码后,即为Object!

以下为详细的代码(呵呵,留个记录)

1.先导入adobe的包到java的工程中!

flex-messaging-core.jar

flex-messaging-common.jar

2.建立好java的socket服务器

包结构: com.sk.socket

package com.sk.socket;

import java.io.IOException;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Scanner;

import com.sk.amf.AmfTool;

public class AmfSocket {
private ServerSocket socket;
private Socket client;
private Scanner in;
private PrintStream out;
private AmfTool tool = new AmfTool();

public AmfSocket(int port) throws IOException {
socket = new ServerSocket(port);
}
public void start() throws IOException{
System.out.println("Amf服务器已启动");
while (true) {
client = socket.accept();
in = new Scanner(client.getInputStream());
out = new PrintStream(client.getOutputStream());
boolean done = false;
while (!done) {
if (in.hasNextLine()) {
String line = in.nextLine();
if (line.trim().toLowerCase().equals("exit")) {
done = true;
} else {
out();
}
} else {
done = true;
}
}
if(done){
client.close();
}
}
}

private void out() {
HashMap map = new HashMap();
map.put("n", "value");
map.put("keys", map);
try {
byte[] bytes = tool.compressOutput(map);
out.write(bytes);
System.out.println(Arrays.toString(bytes));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
try {
new AmfSocket(8888).start();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

2.工具类 AmfTool,包结构: com.sk.amf,此工具目的是将java的hashmap变为2进制的数据输出给flex

package com.sk.amf;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.zip.Deflater;
import flex.messaging.io.SerializationContext;
import flex.messaging.io.amf.Amf3Output;

public class AmfTool {
private Deflater deflater = new Deflater();
private int cacheSize = 1024;
/**
* 压缩后,进行输入
* @return byte[]
* @throws IOException
*/
public byte[] compressOutput(Object obj) throws IOException{
Amf3Output amfOut = new Amf3Output(new SerializationContext());
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
DataOutputStream dataOutStream = new DataOutputStream(byteArrayOutputStream);
amfOut.setOutputStream(dataOutStream);
amfOut.writeObject(obj);
amfOut.flush();
dataOutStream.flush();
byte[] msg = byteArrayOutputStream.toByteArray();
msg = compress(msg);
amfOut.close();
dataOutStream.close();
return msg;
}
/**
* 压缩字节
* @param input
* @return
* @throws IOException
*/
private byte[] compress(byte[] input) throws IOException{
deflater.reset();
deflater.setInput(input);
deflater.finish();
ByteArrayOutputStream outputStream = new ByteArrayOutputStream(input.length);
byte[] buf = new byte[cacheSize];
int len;
while(!deflater.finished()){
len = deflater.deflate(buf);
outputStream.write(buf,0,len);
}
byte[] tmpByte = outputStream.toByteArray();
outputStream.close();
return tmpByte;
}
}

3. Flex的 socket客户端

在FlexBuilder3中建立一个Flex工程,随后建立一个mxml文件,内容:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="fun()">
<mx:Script>
<![CDATA[
import mx.controls.Alert;
private var socket:Socket = new Socket();
function fun(){
socket.connect("127.0.0.1",8888);
socket.addEventListener(Event.CONNECT,conn);
socket.addEventListener(ProgressEvent.SOCKET_DATA,showData);
socket.addEventListener(Event.CLOSE,disconn);
function conn(e){
Alert.show("conn");
}
function disconn(e){
Alert.show("disconn");
}
function showData(e){
var msg:String="";
while(socket.bytesAvailable){
var bytes:ByteArray = new ByteArray();
socket.readBytes(bytes,0,socket.bytesAvailable);
bytes.uncompress();
var obj = bytes.readObject();

msg += obj.n+":";
msg += obj.keys.n;
}
result.text += msg;
}
}
function send(){
var txt:String = msg.text;
socket.writeMultiByte(txt+"\n","gbk");
socket.flush();
msg.text="";
}
]]>
</mx:Script>
<mx:TextArea x="10" y="10" width="356" height="325" id="result"/>
<mx:TextArea x="10" y="369" width="282" id="msg"/>
<mx:Button x="300" y="391" label="Send" click="send()"/>
</mx:Application>

4.首先,启动java的服务端,然后,运行Flex客户端...

注意的是:目前貌似只有java的Hashmap可以as3进行通信,因为Hashmap与as3的Object,js的json格式一致(key,value形式)