求解决方案 - 涉及到串口设备的问题

Question

有一个要完成的任务:

用Swing开发一个窗口在linux系统上运行,linux系统通过串口与一个IC读写器连接.在IC读写器上插入IC卡时,IC卡的信息能在窗口上显示,同时通过这个窗口也能将信息写到IC卡上.

请问谁有过这方面的经验,告诉我应该从哪里着手?

如果需要,我会提供更具体的情况说明.

Answer 1

使用SUN公司有提供一个java的串口开发包[color=red]comm.jar[/color]下面提供一段读写串口的代码，可以参考下：
[code="java"]
package serial;
import java.io.*;
import javax.comm.*;
/**
*

• This bean provides some basic functions to implement full dulplex

• information exchange through the srial port.
  *
  */
  public class SerialBean{

  /* PortName="COM1","COM2" etc. */
  String PortName;

  CommPortIdentifier portId;
  SerialPort serialPort;
  static OutputStream out;
  static InputStream in;
  SerialBuffer serialBuffer;
  ReadSerialThread readSerialThread;
  /**

  • Constructor
  • @param PortID the ID of the serial to be used. 1 for COM1,
  • 2 for COM2, etc. */ public SerialBean(String PortName){ this.PortName = PortName; }

  /**

  • This function initialize the serial port for communication. It startss a
  • thread which consistently monitors the serial port. Any signal capturred

  • from the serial port is stored into a buffer area.
    *
    */
    public int Initialize(){
    final int InitSuccess = 1;
    final int InitFail = -1;
    try{
    portId = CommPortIdentifier.getPortIdentifier(PortName);
    try{
    serialPort = (SerialPort)

        //timeout = 2000mis
        portId.open("Serial_Communication", 2000);
    } catch (PortInUseException e){
            return InitFail;
    }
    
    //Use InputStream in to read from the serial port, and OutputStream
    //out to write to the serial port.
    try{
        in  = serialPort.getInputStream();
        out = serialPort.getOutputStream();
    } catch (IOException e){
        return InitFail;
    }
    
    //Initialize the communication parameters to 9600, 8, 1, none.
    try{
        serialPort.setSerialPortParams(9600,
                    SerialPort.DATABITS_8,
                    SerialPort.STOPBITS_1,
                    SerialPort.PARITY_NONE);
    } catch (UnsupportedCommOperationException e){
        return InitFail;
    }
    

    } catch (NoSuchPortException e){
    return InitFail;
    }

    // when successfully open the serial port, create a new serial buffer,
    // then create a thread that consistently accepts incoming signals from
    // the serial port. Incoming signals are stored in the serial buffer.
    serialBuffer = new SerialBuffer();
    readSerialThread = new ReadSerialThread(serialBuffer, in);
    readSerialThread.start();

    // return success information
    return InitSuccess;
    }

  /**
  *

  • This function returns a string with a certain length from the incomin
  • messages. *
  • @param Length The length of the string to be returned. * */ public String ReadPort(int Length){ String Msg; Msg = serialBuffer.GetMsg(Length); return Msg; }

  /**
  *

  • This function sends a message through the serial port. *
  • @param Msg The string to be sent. * */ public void WritePort(String Msg){ try{ for (int i = 0; i < Msg.length(); i++) out.write(Msg.charAt(i)); } catch (IOException e) {} }

  /**
  *

  • This function closes the serial port in use. * / public void ClosePort(){ /如何正常关闭线程？*/ //readSerial.stop(); serialPort.close(); } }

[/code]