Mina入门

Mina是什么？Apache的定义如下：
Apache MINA is a network application framework which helps users develop high performance and high scalability network applications easily. It provides an abstract · event-driven · asynchronous API over various transports such as TCP/IP and UDP/IP via Java NIO.
Mina是一个网络应用架构，它能帮助我们很轻松的开发出功能强大、可控性强的网络应用。它在 TCP/IP及UDP/IP的基础上通过 Java NIO提供了一个抽象的事件驱动的异步传输消息的编程接口。目前最新版本是：Apache MINA 2.0.0-M5 release。
根据Mina的样例，我将演示一个HelloWorldServer和HelloWordClient的创建

准备工作
您需要准备如下包：

下载地址如下：
mina-2.0.0-M5.zip:http://mina.apache.org/index.html
slf4j-1.5.6.zip:www.slf4j.org
准备好之后,编写HelloWorldServerHandler

package com.ysh.mina.sampleserver;

import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IoSession;

public class HelloWorldServerHandler extends IoHandlerAdapter {
	//当一个客端端连结进入时
	@Override
	public void sessionOpened(IoSession session) throws Exception {
			System.out.println("incomming client : "+session.getRemoteAddress());
		
	}
		
	//当一个客户端关闭时
	@Override
	public void sessionClosed(IoSession session) {
	System.out.println("one Clinet Disconnect !");
	}
	
	//当客户端发送的消息到达时:
	@Override
	public void messageReceived(IoSession session, Object message) throws Exception 
	{
		//我们己设定了服务器解析消息的规则是一行一行读取,这里就可转为String:
		String s=(String)message;
		// Write the received data back to remote peer
		System.out.println("收到客户机发来的消息: "+s);
		session.write("Hello Word: "+"Greeting From Server");
	}	
}

编写HelloWorld服务器端启动程序HelloWorldServer

package com.ysh.mina.sampleserver;

import java.net.InetSocketAddress;

import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.transport.socket.SocketAcceptor;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

public class HelloWorldServer {
	public static void main(String[] args) {
		
		 
		try{
			//创建一个非阻塞的Server端Socket,用NIO
			SocketAcceptor acceptor = new NioSocketAcceptor();		
			
			//创建接收数据的过滤器
			DefaultIoFilterChainBuilder chain = acceptor.getFilterChain();
			
			//设定这个过滤器将一行一行(/r/n)的读取数据
			chain.addLast("myChin", new ProtocolCodecFilter(new	TextLineCodecFactory()));
			
			//设定服务器端的消息处理器:一个SamplMinaServerHandler对象,
			acceptor.setHandler(new HelloWorldServerHandler());		
			
			// 服务器端绑定的端口
			int bindPort=9988;			
			
			//绑定端口,启动服务器
			acceptor.bind(new InetSocketAddress(bindPort));
			System.out.println("Mina Server is Listing on:= " + bindPort);
			
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}	
	
	}
}

接着编写HelloWorldClientHandler

package com.ysh.mina.sampleclient;

import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IoSession;
public class HelloWorldClientHandler extends IoHandlerAdapter{
	
	//当一个客端端连结进入时
	@Override
	public void sessionOpened(IoSession session) throws Exception {				
		session.write("Hello World: server :"+ "Client: "+session.getRemoteAddress()+" is coming!");
	}
	
	//当一个客户端关闭时
	@Override
	public void sessionClosed(IoSession session) {
		System.out.println("Clinet"+session.getRemoteAddress()+" is disconnected!");
	}
	
	//当服务器端发送的消息到达时:
	@Override
	public void messageReceived(IoSession session, Object message)throws Exception {
		
		//我们己设定了服务器解析消息的规则是一行一行读取,这里就可转为String:		
		String s=(String)message;		
		System.out.println("收到服务器发来的消息: "+s);		
		
	}
}

编写我们的客户端程序和服务器端很相似HelloWorldClient

package com.ysh.mina.sampleclient;

import java.net.InetSocketAddress;
import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
import org.apache.mina.core.future.ConnectFuture;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.transport.socket.nio.NioSocketConnector;

public class HelloWorldClient {
	public static void main(String[] args) throws Exception {
		//实际应用中，这里可以生成一个线程来监听			
		// Create TCP/IP connector.
		NioSocketConnector connector = new NioSocketConnector();
		
		// 创建接收数据的过滤器		
		DefaultIoFilterChainBuilder chain = connector.getFilterChain();
		
		//设定这个过滤器将一行一行(/r/n)的读取数据		
		chain.addLast("myChin", new ProtocolCodecFilter(new TextLineCodecFactory()));
		
		//设定服务器端的消息处理器:一个SamplMinaServerHandler对象,		
		connector.setHandler(new HelloWorldClientHandler());
		
		connector.setConnectTimeoutCheckInterval(3000000);
		
		//连结到服务器:
		try
		{
			ConnectFuture cf = connector.connect(new InetSocketAddress("localhost", 9988));
			cf.awaitUninterruptibly();
			cf.getSession().getCloseFuture().awaitUninterruptibly();			
			
		}
		catch(Exception e)
		{
			connector.dispose();
			System.out.println("未能连接到服务器");
		}
	}
}

大功告成：可以运行了。。。。