Java串口完整实例

public class SimpleCommIO implements Runnable {

    static CommPortIdentifier portId;
    static String cmdHand = "I\r\n";
    static String cmdWeight = "WX\r\n";
    static SerialPort serialPort;
    static OutputStream outputStream;
    static String comm="COM11";

    InputStream inputStream;
    Thread readThread;

    public void run() {
        while (true) {
            try {
                byte[] readBuffer = new byte[200];

                try {
                    while (inputStream.available() > 0) {
                        int numBytes = inputStream.read(readBuffer);
                        System.out.print("收到数据："+new String(readBuffer));
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }


    public void initComm() {
        try{
            portId = CommPortIdentifier.getPortIdentifier(comm);
            serialPort = (SerialPort) portId.open("SimpleCommIO",2000);

            outputStream = serialPort.getOutputStream();
            inputStream = serialPort.getInputStream();

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

    }

    public void writeComm(String cmd) {
        try {
            outputStream.write(cmd.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {

        SimpleCommIO reader = new SimpleCommIO();
        reader.initComm();
        Thread readThread = new Thread(reader);
        readThread.start();
        System.out.println("发出指令："+cmdHand);
        reader.writeComm(cmdHand);
        
        //暂停一会儿
        try { 
            Thread.sleep ( 2000 ) ; 
        } catch (InterruptedException ie)
        {
            
        }
        System.out.println("发出指令："+cmdWeight);
        reader.writeComm(cmdWeight);
    }

}