Apache MINA学习之路(1)
1，Apache Mina 也称为：
●NIO 框架
● 客户端/服务端框架（典型的 C/S 架构）
● 网络套接字（networking socket）类库
2，所要加载的包
3，Mina 的执行流程
4，服务端程序
import java.io.IOException;
import java.net.InetSocketAddress;
import org.apache.log4j.Logger;
import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
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.transport.socket.nio.NioSocketAcceptor;
public class Demo1Server {
private static Logger logger =Logger.getLogger(Demo1Server.class);
private static int PORT = 8888;
public static void main(String[] args) {
IoAcceptor acceptor= null;
try {
//创建一个非阻塞的server端的Socket
acceptor = new NioSocketAcceptor();
//创建接收数据的过滤器
DefaultIoFilterChainBuilder chain = acceptor.getFilterChain();
//设置过滤器(使用Mina提供的文本换行符编解码器)
chain.addLast("myChin", new ProtocolCodecFilter(new TextLineCodecFactory()));
//new ProtocolCodecFilter(new TextLineCodecFactory(Charset.forName("UTF-8"),LineDelimiter.WINDOWS.getValue(),LineDelimiter.WINDOWS.getValue()));
// 绑定逻辑处理器
acceptor.setHandler(new Demo1ServerHandler());
// 绑定端口
acceptor.bind(new InetSocketAddress(PORT));
logger.info("服务已启动... 端口号为：" + PORT);
} catch (IOException e) {
logger.error("服务端启动异常....", e);
e.printStackTrace();
}
}
}
逻辑处理器
import java.util.Date;
import org.apache.log4j.Logger;
import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;
public class Demo1ServerHandler extends IoHandlerAdapter {
public static Logger logger = Logger.getLogger(Demo1ServerHandler.class);
public void sessionCreated(IoSession session) throws Exception {
logger.info("服务端与客户端创建连接...");
}
public void sessionOpened(IoSession session) throws Exception {
logger.info("服务端与"+session.getRemoteAddress()+"客户端连接打开...");
}
@Override
public void messageReceived(IoSession session, Object message)
throws Exception {
String msg = message.toString();
logger.info("服务端接收到的数据为：" + msg);
if ("bye".equals(msg)) { // 服务端断开连接的条件
session.close(true);
}
Date date = new Date();
session.write(date);
}
@Override
public void messageSent(IoSession session, Object message) throws Exception {
//session.close(); //发送成功后主动断开与客户端的连接(短连接时使用)
logger.info("服务端发送信息成功...");
}
@Override
public void sessionClosed(IoSession session) throws Exception {
}
public void sessionIdle(IoSession session, IdleStatus status)
throws Exception {
logger.info("服务端进入空闲状态...");
}
@Override
public void exceptionCaught(IoSession session, Throwable cause)
throws Exception {
logger.error("服务端发送异常...", cause);
}
}
测试：cmd -> telnet localhost 8888
5,客户端程序
import java.net.InetSocketAddress;
import java.nio.charset.Charset;
import org.apache.log4j.Logger;
import org.apache.mina.core.future.ConnectFuture;
import org.apache.mina.core.service.IoConnector;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolCodecFactory;
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.transport.socket.nio.NioSocketConnector;
public class MinaClient01 {
private static Logger logger = Logger.getLogger(MinaClient01.class);
private static String HOST = "127.0.0.1";
private static int PORT = 8888;
public static void main(String[] args) {
// 创建一个非阻塞的客户端程序
IoConnector connector = new NioSocketConnector();
// 添加过滤器
connector.getFilterChain().addLast("myChin",new ProtocolCodecFilter(new TextLineCodecFactory()));
// 添加业务逻辑处理器类
connector.setHandler(new Demo1ClientHandler());
IoSession session = null;
try {
// 创建连接
ConnectFuture future = connector.connect(new InetSocketAddress(HOST, PORT));
// 等待连接创建完成
future.awaitUninterruptibly();
// 获得session
session = future.getSession();
// 发送消息
session.write("接收成功");
} catch (Exception e) {
logger.error("客户端链接异常...", e);
}
session.getCloseFuture().awaitUninterruptibly();// 等待连接断开
connector.dispose();
}
}
逻辑处理器
import org.apache.log4j.Logger;
import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IoSession;
public class Demo1ClientHandler extends IoHandlerAdapter {
private static Logger logger = Logger.getLogger(Demo1ClientHandler.class);
//当一个客端端连结进入时
@Override
public void sessionOpened(IoSession session) throws Exception {
logger.info("客户端"+session.getRemoteAddress()+"连接成功");
session.write("我来啦........");
}
//当一个客户端关闭时
@Override
public void sessionClosed(IoSession session) {
logger.info("一个客户端断开连接");
}
//当客户端发送的消息到达时
@Override
public void messageReceived(IoSession session, Object message)
throws Exception {
String msg = message.toString();
logger.info("客户端接收到的信息为：" + msg);
}
@Override
public void exceptionCaught(IoSession session, Throwable cause)
throws Exception {
logger.error("客户端发生异常...", cause);
}
}
6,总结：
服务端程序或客户端程序创建过程：
创建连接--->添加消息过滤器(编码解码等) --->添加业务处理
Mina 的三个核心接口:IoService 接口，IoFilter 接口和 IoHandler 接口：
● 第一步. 创建服务对象（客户端或服务端） ---IoService 接口实现
● 第二步. 数据过滤（编码解码等） ---IOFilter 接口实现
● 第三步. 业务处理 ---IoHandler 接口实现
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