apache之mina

市面上比较成熟的nio框架很少，其中做的比较好的就是apache的nio和jboss的netty了。因为apache是主流，所以可能mina用的较多。

到apache官网下载最新版的mina。接着mina官方给出的例子一起学习下mina。

/* *   Licensed to the Apache Software Foundation (ASF) under one *   or more contributor license agreements.  See the NOTICE file *   distributed with this work for additional information *   regarding copyright ownership.  The ASF licenses this file *   to you under the Apache License, Version 2.0 (the *   "License"); you may not use this file except in compliance *   with the License.  You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * *   Unless required by applicable law or agreed to in writing, *   software distributed under the License is distributed on an *   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *   KIND, either express or implied.  See the License for the *   specific language governing permissions and limitations *   under the License. * */package org.apache.mina.example.gettingstarted.timeserver;import java.io.IOException;import java.net.InetSocketAddress;import java.nio.charset.Charset;import org.apache.mina.core.service.IoAcceptor;import org.apache.mina.core.session.IdleStatus;import org.apache.mina.filter.codec.ProtocolCodecFilter;import org.apache.mina.filter.codec.textline.LineDelimiter;import org.apache.mina.filter.codec.textline.TextLineCodecFactory;import org.apache.mina.filter.logging.LoggingFilter;import org.apache.mina.transport.socket.nio.NioSocketAcceptor;/** * A minimal 'time' server, returning the current date. Opening a telnet server, * you will get the current date by typing any string followed by a new line. *  * In order to quit, just send the 'quit' message. *  * @author <a href="http://mina.apache.org">Apache MINA Project</a> */public class MinaTimeServer {/** * We will use a port above 1024 to be able to launch the server with a * standard user */private static final int PORT = 9123;/** * The server implementation. It's based on TCP, and uses a logging filter * plus a text line decoder. */public static void main(String[] args) throws IOException {// Create the acceptorIoAcceptor acceptor = new NioSocketAcceptor();//ServerSocketChannel的实现，作为服务器// Add two filters : a logger and a codecacceptor.getFilterChain().addLast("logger", new LoggingFilter());acceptor.getFilterChain().addLast("codec",new ProtocolCodecFilter(new TextLineCodecFactory(Charset.forName("UTF-8"), LineDelimiter.WINDOWS.getValue(),LineDelimiter.WINDOWS.getValue())));//linedelimiter是输入流的简单封装//getfilerechain函数是过滤器，知道日志和编码// Attach the business logic to the serveracceptor.setHandler(new TimeServerHandler());//数据接收发送处理类// Configurate the buffer size and the iddle timeacceptor.getSessionConfig().setReadBufferSize(2048);acceptor.getSessionConfig().setIdleTime(IdleStatus.BOTH_IDLE, 10);//监听idle时间的，超过10秒自动断开会话// And bind !acceptor.bind(new InetSocketAddress(PORT));//绑定到9123端口}}

/* *   Licensed to the Apache Software Foundation (ASF) under one *   or more contributor license agreements.  See the NOTICE file *   distributed with this work for additional information *   regarding copyright ownership.  The ASF licenses this file *   to you under the Apache License, Version 2.0 (the *   "License"); you may not use this file except in compliance *   with the License.  You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * *   Unless required by applicable law or agreed to in writing, *   software distributed under the License is distributed on an *   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *   KIND, either express or implied.  See the License for the *   specific language governing permissions and limitations *   under the License. * */package org.apache.mina.example.gettingstarted.timeserver;import java.util.Date;import org.apache.mina.core.service.IoHandlerAdapter;import org.apache.mina.core.session.IdleStatus;import org.apache.mina.core.session.IoSession;/** * The Time Server handler : it return the current date when a message is * received, or close the session if the "quit" message is received. *  * @author <a href="http://mina.apache.org">Apache MINA Project</a> */public class TimeServerHandler extends IoHandlerAdapter {//该函数处理数据，当遇到quit时，断开会话。/** * Trap exceptions. */@Overridepublic void exceptionCaught(IoSession session, Throwable cause)throws Exception {cause.printStackTrace();}/** * If the message is 'quit', we exit by closing the session. Otherwise, we * return the current date. */@Overridepublic void messageReceived(IoSession session, Object message)throws Exception {String str = message.toString();if (str.trim().equalsIgnoreCase("quit")) {// "Quit" ? let's get out ...session.close(true);return;}// Send the current date back to the clientDate date = new Date();session.write(date.toString());//把时间写入session内System.out.println("Message written..." + str);}/** * On idle, we just write a message on the console */@Overridepublic void sessionIdle(IoSession session, IdleStatus status)throws Exception {System.out.println("IDLE " + session.getIdleCount(status));}}

运行minaTimeServer，在命令行内容输入telnet 127.0.0.1 9123，输入信息，客户端输出你输入的信息。这就是简单的通信时间。