为什么我收到“UnsatisfiedLinkError: no SolarisSerialParallel in java.library.path”

Question

您好，我正在尝试使用 java 向我的手机发送短信。当我运行该应用程序时，我收到以下错误。

package HelloWorld;

import java.io.*;
import java.util.BitSet;
import javax.comm.*;
import java.lang.*;
public class SerialToGsm {

    InputStream in;
    OutputStream out;
    String lastIndexRead;
    String senderNum;
    String smsMsg;

    SerialToGsm(String porta) {
        try {
//            CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier("serial0");
            CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier(porta);
            SerialPort sp = (SerialPort)portId.open("Sms_GSM", 0);
            sp.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
            sp.setFlowControlMode(sp.FLOWCONTROL_NONE);

            in = sp.getInputStream();
            out = sp.getOutputStream();

            // modem reset
            sendAndRecv("+++AT", 30);       // delay for 20 sec/10
            sendAndRecv("AT&F", 30);
            sendAndRecv("ATE0", 30);        // echo off
            sendAndRecv("AT +CMEE=1", 30);  // verbose error messages
            sendAndRecv("AT+CMGF=0", 70);   // set pdu mode
//            sendAndRecv("AT V1E0S0=0&D2&C1", 1000000);

        }
        catch (Exception e) {
            System.out.println("Exception " + e);
        System.exit(1);
        }
    }

    private String sendAndRecv(String s, int timeout) {
        try {
            // clean serial port input buffer
            in.skip(in.available());
            System.out.println("=> " + s);
            s = s + "\r";         // add CR
            out.write(s.getBytes());
            out.flush();            

            String strIn = new String();
            for (int i = 0; i < timeout; i++){
                int numChars = in.available();
                if (numChars > 0) {
                    byte[] bb = new byte[numChars];
                    in.read(bb,0,numChars);
                    strIn += new String(bb);
                }
                // start exit conditions
                // ---------------------
                if (strIn.indexOf(">\r\n") != -1) {
                    break;
                }                                         

                if (strIn.indexOf("OK\r\n") != -1){
                    break;
                }                                         

                if (strIn.indexOf("ERROR") != -1) { // if find 'error' wait for CR+LF
                    if (strIn.indexOf("\r\n",strIn.indexOf("ERROR") + 1) != -1) {
                        break;                                             
                    }
                }                                         

        Thread.sleep(100); // delay 1/10 sec
            }

            System.out.println("<= " + strIn);

            if (strIn.length() == 0) {
                return "ERROR: len 0";
            }

            return strIn;
        }
        catch (Exception e) {                  
            System.out.println("send e recv Exception " + e);
            return "ERROR: send e recv Exception";
        }
    }

    public String sendSms (String numToSend, String whatToSend) {
        ComputSmsData sms = new ComputSmsData();
        sms.setAsciiTxt(whatToSend);
        sms.setTelNum(numToSend);
//        sms.setSMSCTelNum("+393359609600");  // SC fixed
        String s = new String();
        s = sendAndRecv("AT+CMGS=" + (sms.getCompletePduData().length() / 2) + "\r", 30);
//        System.out.println("==> AT+CMGS=" + (sms.getCompletePduData().length() / 2));
//        System.out.println("<== " + s);
        if (s.indexOf(">") != -1) {
//            s = sendAndRecv(sms.getSMSCPduData() + sms.getCompletePduData() + "\u001A"); // usefull one day?
//            System.out.println("Inviero questo >>>> " + sms.getCompletePduData()); 

            // if this sintax won't work try remove 00 prefix
            s = sendAndRecv("00" + sms.getCompletePduData() + "\u001A", 150);

//            System.out.println("<== " + s);
            return s;
        }              
        else {
            return "ERROR";
        }
    }

    // used to reset message data
    private void resetGsmObj() {
        lastIndexRead = null;
        senderNum = null;
        smsMsg = null;
    }


    public String checkSms (){
        String str = new String();
        String strGsm = new String();                          
        strGsm = sendAndRecv("AT+CMGL=0", 30);  // list unread msg and sign them as read
        // if answer contain ERROR then ERROR
        if (strGsm.indexOf("ERROR") != -1) {
            resetGsmObj();
            return strGsm; // error
        }

        strGsm = sendAndRecv("AT+CMGL=1", 30);  // list read msg
        // if answer contain ERROR then ERROR
        if (strGsm.indexOf("ERROR") != -1) {
            resetGsmObj();
            return strGsm; // error
        }

        // evaluate message index
        if (strGsm.indexOf(':') <= 0) {
            resetGsmObj();
            return ("ERROR unexpected answer");
        }

        str = strGsm.substring(strGsm.indexOf(':') + 1,strGsm.indexOf(','));
        str = str.trim(); // remove white spaces
//        System.out.println("Index: " + str);
        lastIndexRead = str;

        // find message string
        // -------------------
        // look for start point (search \r, then skip \n, add and one more for right char
        int startPoint = strGsm.indexOf("\r",(strGsm.indexOf(":") + 1)) + 2;
        int endPoint = strGsm.indexOf("\r",startPoint + 1);
        if (endPoint == -1) {
            // only one message
            endPoint = strGsm.length();
        }

        // extract string
        str = strGsm.substring(startPoint, endPoint);
        System.out.println("String to be decoded :" + str);

        ComputSmsData sms = new ComputSmsData();
        sms.setRcvdPdu(str);
//        SMSCNum = new String(sms.getRcvdPduSMSC());
        senderNum = new String(sms.getRcvdSenderNumber());
        smsMsg = new String(sms.getRcvdPduTxt());

        System.out.println("SMSC number:   " + sms.getRcvdPduSMSC());
        System.out.println("Sender number: " + sms.getRcvdSenderNumber());
        System.out.println("Message: " + sms.getRcvdPduTxt());

        return "OK";
    }

    public String readSmsSender() {
        return senderNum;
    }

    public String readSms() {
        return smsMsg;
    }

    public String delSms() {   
        if (lastIndexRead != "") {                
            return sendAndRecv("AT+CMGD=" + lastIndexRead, 30);
        }
        return ("ERROR");
    }
}

错误：

Error loading SolarisSerial: java.lang.UnsatisfiedLinkError: no SolarisSerialParallel in java.library.path
Caught java.lang.UnsatisfiedLinkError: com.sun.comm.SolarisDriver.readRegistrySerial(Ljava/util/Vector;Ljava/lang/String;)I while loading driver com.sun.comm.SolarisDriver
Exception javax.comm.NoSuchPortException

Answer 1

这通常是一个路径问题：您依赖于一个 dll，但它所在的目录不在您的路径上。

Answer 2

您的代码正在尝试（间接）加载名为 SolarisSerialParallel 的本机库，JVM 无法找到该库。在 UNIX 计算机上，环境变量 LD_LIBRARY_PATH 中包含的目录之一中应该有 libSolarisSerialParallel.so 文件。在 Windows 上，SolarisSerialParallel.dll 应位于 PATH 中的目录之一。要隔离错误，请尝试使用 System.loadLibrary("SolarisSerialParallel") 行运行主程序。您可以在此处了解有关 JNI 的更多信息。

Answer 3

我建议将这段代码削减为更简单的测试用例。无论如何，当您隔离问题时，您最终可能会找到解决方案。