快速开发mina（翻译）

本文的源地址为：http://mina.apache.org/mina-project/quick-start-guide.html

本文带你进入如何建立一个基于mina程序的全过程。本文将带领你建立一个时间服务器。

准备工作：

• MINA 2.0.7 Core
• JDK 1.5 或者以上版本
• SLF4 1.3.0 或者以上版本（|http://www.slf4j.org/]）
  • Log4J 1.2 版本: slf4j-api.jar, slf4j-log4j12.jar, 和Log4J 1.2.x
  • Log4J 1.3 版本: slf4j-api.jar, slf4j-log4j13.jar, and Log4J 1.3.x
  • java.util.logging 版本: slf4j-api.jar and slf4j-jdk14.jar
  • 注意 : 请确认你使用的 slf4j-*.jar 版本是和你的日志框架版本是相符合的. 例如, slf4j-log4j12.jar 和 log4j-1.3.x.jar 不能混合到一起使用, 如果这样使用可能会产生问题

第一步：建立时间服务器：

MinaTimeServer {

    public static void main(String[] args) {
        // code will go here next
    }
}

第二步：建立接收connection程序SocketAcceptor

import org.apache.mina.core.service.IoAcceptor;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

public class MinaTimeServer
{
    public static void main( String[] args )
    {
        IoAcceptor acceptor = new NioSocketAcceptor();
    }
}

第三步：定义处理类，并绑定NioSocketAcceptor到指定端口

import java.nio.charset.Charset;

import org.apache.mina.core.service.IoAcceptor;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.filter.logging.LoggingFilter;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

public class MinaTimeServer
{
    public static void main( String[] args )
    {
        IoAcceptor acceptor = new NioSocketAcceptor();

        acceptor.getFilterChain().addLast( "logger", new LoggingFilter() );
        acceptor.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "UTF-8" ))));
    }
}

第四步：增加处理类

import java.io.IOException;
import java.nio.charset.Charset;

import org.apache.mina.core.service.IoAcceptor;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.filter.logging.LoggingFilter;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

public class MinaTimeServer
{
    public static void main( String[] args ) throws IOException
    {
        IoAcceptor acceptor = new NioSocketAcceptor();

        acceptor.getFilterChain().addLast( "logger", new LoggingFilter() );
        acceptor.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "UTF-8" ))));

        acceptor.setHandler(  new TimeServerHandler() );
    }
}

第五步：增加 NioSocketAcceptor配置

import java.io.IOException;
import java.nio.charset.Charset;

import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.service.IoAcceptor;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
import org.apache.mina.filter.logging.LoggingFilter;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

public class MinaTimeServer
{
    public static void main( String[] args ) throws IOException
    {
        IoAcceptor acceptor = new NioSocketAcceptor();

        acceptor.getFilterChain().addLast( "logger", new LoggingFilter() );
        acceptor.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "UTF-8" ))));

        acceptor.setHandler(  new TimeServerHandler() );

        acceptor.getSessionConfig().setReadBufferSize( 2048 );
        acceptor.getSessionConfig().setIdleTime( IdleStatus.BOTH_IDLE, 10 );
    }
}

第六步：处理类，继承自IoHandlerAdapter

import java.util.Date;

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

public class TimeServerHandler extends IoHandlerAdapter
{
    @Override
    public void exceptionCaught( IoSession session, Throwable cause ) throws Exception
    {
        cause.printStackTrace();
    }

    @Override
    public void messageReceived( IoSession session, Object message ) throws Exception
    {
        String str = message.toString();
        if( str.trim().equalsIgnoreCase("quit") ) {
            session.close();
            return;
        }

        Date date = new Date();
        session.write( date.toString() );
        System.out.println("Message written...");
    }

    @Override
    public void sessionIdle( IoSession session, IdleStatus status ) throws Exception
    {
        System.out.println( "IDLE " + session.getIdleCount( status ));
    }
}

第七步：定义时间服务器要监听的地址。

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.TextLineCodecFactory;
import org.apache.mina.filter.logging.LoggingFilter;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

public class MinaTimeServer
{
    private static final int PORT = 9123;

    public static void main( String[] args ) throws IOException
    {
        IoAcceptor acceptor = new NioSocketAcceptor();

        acceptor.getFilterChain().addLast( "logger", new LoggingFilter() );
        acceptor.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "UTF-8" ))));

        acceptor.setHandler( new TimeServerHandler() );
    acceptor.getSessionConfig().setReadBufferSize( 2048 );
        acceptor.getSessionConfig().setIdleTime( IdleStatus.BOTH_IDLE, 10 );
        acceptor.bind( new InetSocketAddress(PORT) );
    }
}