我在Windows 7 64位上使用/或安装rxtx时遇到问题.我以前在x86 win XP系统上使用它并没有问题.由于某些原因重新安装到这个新系统,rxtx无法找到任何端口.我已经尝试了rxtx安装,Cloud Hopper的64位本机库并删除所有rxtx文件并从头开始.找到RXTXcomm.jar,我可以浏览NetBeans中的软件包,但实现似乎已被破坏或找不到.

每次执行时,此行都会失败：

comPort = "COM1";
portId = CommPortIdentifier.getPortIdentifier(comPort);

并抛出NoSuchPortException.

使用它列出串行端口不会产生任何结果.

Enumeration ports = CommPortIdentifier.getPortIdentifiers();
String portArray[] = null;
while (ports.hasMoreElements()) {
    CommPortIdentifier port = (CommPortIdentifier) ports.nextElement();
    System.out.println(port.getName());
}

我已经检查过串口是否可用所以此时我想知道本机库是否只是针对Windows 7 64位而被破坏了.

有没有人在Windows 7 64位下成功使用RXTX 2.2pre2？

构造函数中的违规代码部分：

public SerialControl(String name,String comPort,int baudrate,int databits,String     parity,double stopbits) throws Exception {
    int stop = 0;
    int data = 0;
    int par = 0;
 
    this.name=name;
 
    // Sanity checks and interpretation
    if (baudrate > 115200 || baudrate < 300) {
        System.err.println(name+": constructor(): Invalid baudrate "+baudrate);
        throw new Exception("Invalid baudrate," + baudrate);
    }
 
    if (databits >= 5 && databits <= 8) {
        switch (databits) {
            case 5:
                data = SerialPort.DATABITS_5;
                break;
            case 6:
                data = SerialPort.DATABITS_6;
                break;
            case 7:
                data = SerialPort.DATABITS_7;
                break;
            case 8:
                data = SerialPort.DATABITS_8;
                break;
            default:
                System.err.println(name+": constructor(): Invalid data bits,switched " + databits);
                throw new Exception("Invalid data bits,switched " + databits);
        }
    } else {
        throw new Exception("Invalid data bits=" + databits);
    }
 
    if (stopbits >= 1.0 && stopbits <= 2.0) {
 
        if (stopbits == 1.0) {
            stop = SerialPort.STOPBITS_1;
        } else if (stopbits == 1.5) {
            stop = SerialPort.STOPBITS_1_5;
        } else if (stopbits == 2.0) {
            stop = SerialPort.STOPBITS_2;
        } else {
            System.err.println(name+": constructor(): Invalid stop bits,switched " + stopbits);
            throw new Exception("Invalid stop bits,switched " + stopbits);
        }
    } else {
        System.err.println(name+": constructor(): Invalid stop bits,switched " + stopbits);
        throw new Exception("Invalid stop bits " + stopbits);
    }
 
    switch (parity) {
        case "S":
            par = SerialPort.PARITY_SPACE;
            break;
        case "E":
            par = SerialPort.PARITY_EVEN;
            break;
        case "M":
            par = SerialPort.PARITY_MARK;
            break;
        case "O":
            par = SerialPort.PARITY_ODD;
            break;
        case "N":
            par = SerialPort.PARITY_NONE;
            break;
        default:
            System.err.println(name+": constructor(): Invalid parity,switched " + parity);
            throw new Exception("Invalid parity,switched " + parity);
    }
 
    // Inits
    // Try to find the port specified
    try {
        portId = CommPortIdentifier.getPortIdentifier(comPort);
    } catch (Exception e) {
        System.err.println(name+": constructor(): No such port \"" + comPort+"\"");
        e.printStackTrace();
        throw e;
    }
 
    // Open the port
    try {
        serialPort = (SerialPort) portId.open("User Port",2000);
    } catch (PortInUseException e) {
        System.err.println(name+": constructor(): Could not open port " + comPort);
        throw e;
    }
 
    // Grab the input stream
    try {
        inputStream = serialPort.getInputStream();
    } catch (IOException e) {
        System.err.println(name+": constructor(): Could not get input stream for " + comPort);
        throw e;
    }
 
    // Set the serial port parameters,no flow control
    try {
        serialPort.setSerialPortParams(baudrate,data,stop,par);
        serialPort.setDTR(false);
        serialPort.setRTS(false);
    } catch (UnsupportedCommOperationException e) {
        System.err.println(name+": constructor(): Error initializing " + comPort);
        throw e;
    }
}