【Flex】Flex socket (1)

? 最近在学Flex，说实话flex代码风格与java很类似，所以学起来不怎么费劲。下面介绍一下我写的flex socket通信，此版本是在本地调试的，所以没有安全沙箱处理。

? Flex socket的特点是：

? 1、发送和接收是异步的。

? 2、socket的状态都是通过事件监听的。例如接收数据，给socket添加接收数据事件器，如果有数据接收，数据监听器就会触发。

? 下面是一个小demo，主要功能是发送一个字符串，服务器接收然后返回给客户端，客户端再显示。

? Flex

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical"
	creationComplete="init()">
	<mx:Script>
		<![CDATA[
			[Bindable]
			private var text:String = "";
			private var socket:Socket;
			private var SEND_HEAD:String = "Send:";
			private var RECEIVE_HEAD:String = "Receive:";
			
			private function init():void {
				socket = new Socket(); //new出来,这时候才能被使用
				socket.connect("localhost",9999); //连接服务器,参数 host:String,prot:int
				socket.addEventListener(Event.CONNECT,isConnect); //监听是否连接上服务器
				socket.addEventListener(IOErrorEvent.IO_ERROR,isIOError); 
				socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR,isSecurityError);//安全沙箱
				socket.addEventListener(Event.CLOSE,isClose);	//监听服务器是否关闭
				socket.addEventListener(ProgressEvent.SOCKET_DATA,isData);//获取数据
			}
			
			private function isConnect(event:Event):void {
				text += "Socket Connect Successful!n";
			}
			
			private function isClose(event:Event):void {
				text += "Socket Connect is Close!n"
			}
			
			private function isSecurityError(event:Event):void {
				text += "Security Error!n";
			}
			
			private function isIOError(event:Event):void {
				text += "IO Error!n";
			}
			
			/**
			 * 处理接收事件
			 */
			private function isData(event:Event):void {
				if(socket.connected) {
					while(socket.bytesAvailable) {
						var msg:String = socket.readUTFBytes(socket.bytesAvailable);
						text += RECEIVE_HEAD + msg.length + "|" + msg + "n";
					}
				}
			}
			
			private function sendMsg():void {
				var str:String = inputText.text;
				if(str != null && str != "") {
					if(socket.connected) {
						//var b:ByteArray = new ByteArray;
						//b.writeUTF(str);
						//b.writeMultiByte(str,"UTF-8");
						//socket.writeBytes(b);
						trace("str: "+str+" length: "+str.length);
						//socket.writeUTF(str);
						//socket.writeMultiByte(str,"UTF-8");
						socket.writeUTFBytes(str);
						socket.flush();
						
						text += SEND_HEAD + str + "n";
						inputText.text = "";
					}
				}
			}
		]]>
	</mx:Script>
	<mx:TextArea text="{text}" width="300" height="300"/>
	<mx:TextInput id="inputText"/>
	<mx:Button label="send" click="sendMsg()"/>
</mx:Application>

FlexServer.java 主程序

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class FlexServer {
	public static void main(String[] args) {
		ServerSocket ss = null;
		Socket socket = null;
		SocketThread st = null;
		Thread thread = null;
		try {
			ss = new ServerSocket(9999);
			while(true) {
				socket = ss.accept();
				st = new SocketThread(socket);
				thread = new Thread(st);
				thread.start();
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				if(socket != null) {
					socket.close();
				}
				if(ss != null) {
					ss.close();
				}
			} catch (IOException e) {
			}
		}
		
	}
}

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.Socket;

public class SocketThread implements Runnable{
	private Socket socket = null;
	
	public SocketThread(Socket socket) {
		this.socket = socket;
	}

	@Override
	public void run() {
		DataInputStream reader = null;
		DataOutputStream writer = null;
		byte[] buffer = null;
		try {
			if (socket != null) {
				reader = new DataInputStream(socket.getInputStream());
				writer = new DataOutputStream(socket.getOutputStream());
				while(true) {
					if(reader.available() == 0) {
						continue;
					}
					buffer = new byte[1024];
					int line = reader.read(buffer);
					System.out.println(new String(buffer,line)+" length: "+line);
					/*//异步测试
					try {
						Thread.sleep(10000);
					} catch (InterruptedException e) {
					}*/
					writer.write(buffer,line);
					writer.flush();
					buffer = null;
				}
			} else {
				System.out.println("This socket is null");
			}
		} catch (UnsupportedEncodingException e) {
		} catch (IOException e) {
		} finally {
			try {
				if (reader != null) {
					reader.close();
				}
				if (writer != null) {
					writer.close();
				}

				if (socket != null) {
					socket.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
}