v24.java

java pos,你可以直接编译运行,

/*
 * Copyright (c) 2000 jPOS.org.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *    "This product includes software developed by the jPOS project 
 *    (http://www.jpos.org/)". Alternately, this acknowledgment may 
 *    appear in the software itself, if and wherever such third-party 
 *    acknowledgments normally appear.
 *
 * 4. The names "jPOS" and "jPOS.org" must not be used to endorse 
 *    or promote products derived from this software without prior 
 *    written permission. For written permission, please contact 
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "jPOS",
 *    nor may "jPOS" appear in their name, without prior written
 *    permission of the jPOS project.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  
 * IN NO EVENT SHALL THE JPOS PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR 
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the jPOS Project.  For more
 * information please see <http://www.jpos.org/>.
 */

package org.jpos.util;

import javax.comm.CommPortIdentifier;
import javax.comm.PortInUseException;
import javax.comm.SerialPort;
import javax.comm.SerialPortEvent;
import javax.comm.SerialPortEventListener;
import javax.comm.UnsupportedCommOperationException;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.TooManyListenersException;

import org.jpos.iso.ISOUtil;

/**
 * handy Serial port functions 
 *
 * @author [e-mail]
 * @version $Id: V24.java,v 1.14 2003/10/13 11:04:20 apr Exp $
 * @see <a href="http://www.frii.com/~jarvi/rxtx/">CommAPI</a>
 */
public class V24 implements SerialPortEventListener, LogSource 
{
    Logger logger;
    String realm;
    InputStream is;
    OutputStream os;
    SerialPort port;
    CommPortIdentifier portId;
    long lostCD;
    boolean watchCD, autoFlushRX;

    public static final int MAX_STRING_SIZE = 64*1024; 

    /**
     * @param portId
     * @param logger
     * @param realm
     * @throws IOException
     * @throws PortInUseException
     */
    public V24 (CommPortIdentifier portId, Logger logger, String realm) 
        throws IOException, PortInUseException
    {
        super();
        setLogger (logger, realm);
        this.portId = portId;
        this.autoFlushRX = false;
        initPort();
    }
    /**
     * @param portName (i.e. /dev/ttyS1)
     * @param logger
     * @param realm
     * @throws IOException
     * @throws PortInUseException
     */
    public V24 (String portName, Logger logger, String realm) 
        throws IOException, PortInUseException
    {
        super();
        setLogger (logger, realm);
        portId = getPortIdentifier(portName);
        initPort();
    }
    /**
     * removeEventListener, close Port
     */
    public void close() {
        port.removeEventListener();
        port.setDTR (false);
        port.close();
    }
    /**
     * port is opened by default within V24 constructors<br>
     * the close()/open() scheme is used to work around some
     * extrange behaveour on some CommAPI implementations
     */
    public void open() throws IOException, PortInUseException {
        initPort();
    }
    /**
     * @return already opened port
     */
    public SerialPort getSerialPort() {
        return port;
    }
    /**
     * @param watchCD true to monitor 
     */
    public void setWatchCD (boolean watchCD) {
        this.watchCD = watchCD;
    }
    /**
     * @return OutputStream associated with this port
     */
    public OutputStream getOutputStream() {
        return os;
    }
    /**
     * @return InputStream associated with this port
     */
    public InputStream getInputStream() {
        return is;
    }

    /**
     * @param ev SerialPortEvent
     * SerialPortEventListener requirements
     */
    public void serialEvent (SerialPortEvent ev) {
        int evType = ev.getEventType();
        switch (evType) {
            case SerialPortEvent.DSR:
                if (!ev.getNewValue())
                    synchronized (this) {
                        this.notify();
                    }
                break;
            case SerialPortEvent.CD:
                checkCD (ev.getNewValue());
                if (!ev.getNewValue())
                    synchronized (this) {
                        this.notify();
                    }
                break;
            case SerialPortEvent.DATA_AVAILABLE:
                if (autoFlushRX)
                    try {
                        flushAndLog();
                    } catch (IOException e) { }
                else {
                    synchronized (this) {
                        this.notify();
                    }
                }
                break;
        }
        Thread.yield();
    }
    /**
     * @param baud Baud Rate
     * @param data number of Data bits
     * @param stop number of Stop bits
     * @param flow Flow Control mask
     * @see javax.comm.SerialPort
     * @throws UnsupportedCommOperationException
     */
    public synchronized void setSpeed
        (int baud, int data, int stop, int parity, int flow)
        throws UnsupportedCommOperationException
    {
        port.setSerialPortParams(baud, data, stop, parity);
        port.setFlowControlMode (flow);
    }

    /**
     * @param logger current logger
     * @param realm  logger realm
     * @see LogSource
     */
    public void setLogger (Logger logger, String realm) {
        this.logger = logger;
        this.realm  = realm;
    }
    /**
     * @return current log realm
     * @see LogSource
     */
    public String getRealm () {
        return realm;
    }
    /**
     * @return current Logger
     */
    public Logger getLogger() {
        return logger;
    }

    private String elapsed (long start) {
        long el = System.currentTimeMillis() - start;
        if (el < 5000)
            return el + "ms";
        else
            return (el/1000) + "s";
    }
    private void checkCD(boolean on) {
        if (!on) {
            lostCD = System.currentTimeMillis();
            Logger.log (
                new LogEvent (this,"badnews",portId.getName()+" lost CD ")
            );
        }
        else {
            if (lostCD != 0) {
                Logger.log (
                    new LogEvent (this, "goodnews",
                        portId.getName() 
                        + " recovered CD after "
                        + elapsed (lostCD))
                );
            }
            lostCD = 0;
            synchronized (this) {
                this.notify();
            }
        }
    }
    /**
     * @return connection status
     */
    public boolean isConnected() {
        // return port.isDSR() && port.isCD();
        return port.isCD();
        // return port.isDSR();
    }
    /**
     * flush receiver and dump discarded characters thru Logger
     * @throws IOException
     */
    public void flushAndLog () throws IOException {
        StringBuffer buf = new StringBuffer();
        while (is.available() > 0) {
            while (is.available() > 0) {
                char c = (char) is.read();
                if (buf.length() < 1000) // paranoia check - ignore garbage
                    buf.append (c);
                else 
                    throw new IOException ("excessive garbage");
            }
            try {
                // avoid multiple log events. Wait for possibly
                // more characters to arrive
                Thread.sleep (250);
            } catch (InterruptedException e) { }
        }
        Logger.log (
            new LogEvent (this, "flush",
                ISOUtil.dumpString(
                    buf.toString().getBytes()
                )
            )
        );
    }
    /**
     * flush receiver
     * @throws IOException
     */
    public void flushReceiver () throws IOException {
        while (is.available() > 0) 
            is.read();
    }

    /**
     * @param b content to be sent (do not perform flush after sending)
     * @throws IOException
     */
    public synchronized void send (byte[] b) throws IOException {
        os.write (b);