串口通讯，关于javax.comm的安装配置

http://blog.csdn.net/djsl6071/article/details/1550678

文件清单：

comm.jar
Javax.comm.properties
win32com.dll

 把Javax.comm.properties和.dll文件复制到JDK下面的jre/lib/ext.中， comm.jar复制到你建的工程下的LIB的classpath目录下。

环境建好完后，我们用SUN的例子测试一下：

1、向COM1写文字

package com.example;

/*
 * @(#)SimpleWrite.Java 1.12 98/06/25 SMI
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license
 * to use, modify and redistribute this software in source and binary
 * code form, provided that i) this copyright notice and license appear
 * on all copies of the software; and ii) Licensee does not utilize the
 * software in a manner which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind.
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
 * ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE
 * SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS
 * BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES,
 * HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING
 * OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control
 * of aircraft, air traffic, aircraft navigation or aircraft
 * communications; or in the design, construction, operation or
 * maintenance of any nuclear facility. Licensee represents and
 * warrants that it will not use or redistribute the Software for such
 * purposes.
 */
import Java.io.IOException;
import Java.io.OutputStream;
import Java.util.Enumeration;

import Javax.comm.CommPortIdentifier;
import Javax.comm.PortInUseException;
import Javax.comm.SerialPort;
import Javax.comm.UnsupportedCommOperationException;

/**
 * Class declaration
 *
 *
 * @author
 * @version 1.10, 08/04/00
 */
public class SimpleWrite {
    static Enumeration       portList;
    static CommPortIdentifier portId;
    static String       messageString = "Hello, world!";
    static SerialPort       serialPort;
    static OutputStream       outputStream;
    static boolean       outputBufferEmptyFlag = false;
    /**
     * Method declaration
     *
     *
     * @param args
     *
     * @see
     */
    public static void main(String[] args) {
 boolean portFound = false;

 String  defaultPort = "COM1";
 if (args.length > 0) {
     defaultPort = args[0];
 }

 portList = CommPortIdentifier.getPortIdentifiers();
 System.out.println(portList.hasMoreElements());
 while (portList.hasMoreElements()) {
     portId = (CommPortIdentifier) portList.nextElement();
     System.out.println("portid:"+portId.getName());
     if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {

  if (portId.getName().equals(defaultPort)) {
      System.out.println("Found port " + defaultPort);

      portFound = true;

      try {
   serialPort =
       (SerialPort) portId.open("SimpleWrite", 2000);
      } catch (PortInUseException e) {
   System.out.println("Port in use.");

   continue;
      }

      try {
   outputStream = serialPort.getOutputStream();
      } catch (IOException e) {}

      try {
   serialPort.setSerialPortParams(9600,
             SerialPort.DATABITS_8,
             SerialPort.STOPBITS_1,
             SerialPort.PARITY_NONE);
      } catch (UnsupportedCommOperationException e) {}
 

      try {
       serialPort.notifyOnOutputEmpty(true);
      } catch (Exception e) {
   System.out.println("Error setting event notification");
   System.out.println(e.toString());
   System.exit(-1);
      }
     
     
      System.out.println(
       "Writing /""+messageString+"/" to "
   +serialPort.getName());

      try {
   outputStream.write(messageString.getBytes());
      } catch (IOException e) {}

      try {
         Thread.sleep(2000);  // Be sure data is xferred before closing
      } catch (Exception e) {}
      serialPort.close();
      System.exit(1);
  }
     }
 }

 if (!portFound) {
     System.out.println("port " + defaultPort + " not found.");
 }
    }

}

 运行结果：
true
portid:COM4
portid:COM1
Found port COM1
Writing "Hello, world!" to COM1

 

2、从COM1端口接收文字

package com.example;

/*
 * @(#)SimpleRead.Java 1.12 98/06/25 SMI
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license
 * to use, modify and redistribute this software in source and binary
 * code form, provided that i) this copyright notice and license appear
 * on all copies of the software; and ii) Licensee does not utilize the
 * software in a manner which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind.
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
 * ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE
 * SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS
 * BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES,
 * HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING
 * OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control
 * of aircraft, air traffic, aircraft navigation or aircraft
 * communications; or in the design, construction, operation or
 * maintenance of any nuclear facility. Licensee represents and
 * warrants that it will not use or redistribute the Software for such
 * purposes.
 */
import Java.io.*;
import Java.util.*;
import Javax.comm.*;

/**
 * Class declaration
 *
 *
 * @author
 * @version 1.8, 08/03/00
 */
public class SimpleRead implements Runnable, SerialPortEventListener {
    static CommPortIdentifier portId;
    static Enumeration       portList;
    InputStream        inputStream;
    SerialPort        serialPort;
    Thread        readThread;

    /**
     * Method declaration
     *
     *
     * @param args
     *
     * @see
     */
    public static void main(String[] args) {
    boolean        portFound = false;
    String        defaultPort = "COM1";

  if (args.length > 0) {
     defaultPort = args[0];
 }
  
 portList = CommPortIdentifier.getPortIdentifiers();

 while (portList.hasMoreElements()) {
     portId = (CommPortIdentifier) portList.nextElement();
     if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
  if (portId.getName().equals(defaultPort)) {
      System.out.println("Found port: "+defaultPort);
      portFound = true;
      SimpleRead reader = new SimpleRead();
  }
     }
 }
 if (!portFound) {
     System.out.println("port " + defaultPort + " not found.");
 }
 
    }

    /**
     * Constructor declaration
     *
     *
     * @see
     */
    public SimpleRead() {
 try {
     serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
 } catch (PortInUseException e) {}

 try {
     inputStream = serialPort.getInputStream();
 } catch (IOException e) {}

 try {
     serialPort.addEventListener(this);
 } catch (TooManyListenersException e) {}

 serialPort.notifyOnDataAvailable(true);

 try {
     serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8,
        SerialPort.STOPBITS_1,
        SerialPort.PARITY_NONE);
 } catch (UnsupportedCommOperationException e) {}

 readThread = new Thread(this);

 readThread.start();
    }

    /**
     * Method declaration
     *
     *
     * @see
     */
    public void run() {
 try {
     Thread.sleep(20000);
 } catch (InterruptedException e) {}
    }

    /**
     * Method declaration
     *
     *
     * @param event
     *
     * @see
     */
    public void serialEvent(SerialPortEvent event) {
 switch (event.getEventType()) {

 case SerialPortEvent.BI:

 case SerialPortEvent.OE:

 case SerialPortEvent.FE:

 case SerialPortEvent.PE:

 case SerialPortEvent.CD:

 case SerialPortEvent.CTS:

 case SerialPortEvent.DSR:

 case SerialPortEvent.RI:

 case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
     break;

 case SerialPortEvent.DATA_AVAILABLE:
     byte[] readBuffer = new byte[20];

     try {
  while (inputStream.available() > 0) {
      int numBytes = inputStream.read(readBuffer);
  }

  System.out.print(new String(readBuffer));
     } catch (IOException e) {}

     break;
 }
    }

}

 

程序启动后：

 

Found port: COM1

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