为什么方法RXTXCommDriver.nativeGetVersion（）不起作用

Question

我使用JPOS库。我正在尝试使用RXTXCommDriver类获取所有串口的列表。调用主要的本机方法时会发生错误，该方法会获取所有端口的列表。

  

java.lang.UnsatisfiedLinkError：javax.comm.RXTXCommDriver.nativeGetVersion（）Ljava / lang / String;

public class RXTXCommDriver implements CommDriver
{

    private final static boolean debug = true;
    private final static boolean devel = false;
    private final static boolean noVersionOutput = "true".equals( System.getProperty( "gnu.io.rxtx.NoVersionOutput" ) );

    static
    {
        if(debug ) System.out.println("RXTXCommDriver {}");
        System.loadLibrary( "rxtxSerial" );

        /*
           Perform a crude check to make sure people don't mix
           versions of the Jar and native lib

           Mixing the libs can create a nightmare.

           It could be possible to move this over to RXTXVersion
           but All we want to do is warn people when first loading
           the Library.
        */
        String JarVersion = RXTXVersion.getVersion();
        String LibVersion;
        try {
                LibVersion = RXTXVersion.nativeGetVersion();
        } catch ( Error UnsatisfiedLinkError )
        {
            // for rxtx prior to 2.1.7
            LibVersion = nativeGetVersion();
        }
        if ( devel )
        {
            if ( ! noVersionOutput )
            {
                System.out.println("Stable Library");
                System.out.println("=========================================");
                System.out.println("Native lib Version = " + LibVersion );
                System.out.println("Java lib Version   = " + JarVersion );
            }
        }