2017-09-19 83 views
0

我想在我的Raspberry Pi 3上使用XBee Java Lib及其教程做一個簡單的Xbee示例,但我想在將它轉換爲.jar文件之前執行它。我只想將它作爲一個.class文件來執行,非常簡單,之後我想將它導入到另一個項目中。 (我不擅長與Java,因爲它是可以看到) 編譯我試圖執行它之後:在樹莓派上使用Java Lib的XBee

java -cp $XBJL_CLASS_PATH:. com.digi.xbee.example.MainApp 

echo $XBJL_CLASS_PATH是:

libs/xbee-java-library-1.2.1.jar:libs/rxtx-2.2.jar:libs/slf4j-api-1.7.12.jar:libs/slf4j-nop-1.7.12.jar:libs/android-sdk-5.1.1.jar:libs/android-sdk-addon-3.jar 

這意味着所有的.jar繳費至從XBee Java Lib中使用。

它沒有work.I've也嘗試過:

java com.digi.xbee.example.MainApp 

我總是得到同樣的錯誤:

Error: A JNI error has occurred, please check your installation and try again 
Exception in thread "main" java.lang.NoClassDefFoundError: com/digi/xbee/api/XBeeDevice 
     at java.lang.Class.getDeclaredMethods0(Native Method) 
     at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) 
     at java.lang.Class.privateGetMethodRecursive(Class.java:3048) 
     at java.lang.Class.getMethod0(Class.java:3018) 
     at java.lang.Class.getMethod(Class.java:1784) 
     at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544) 
     at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526) 
Caused by: java.lang.ClassNotFoundException: com.digi.xbee.api.XBeeDevice 
     at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 
     at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) 
     at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
     ... 7 more 

有誰知道什麼可以happenning?這是說我沒有導入XBeeDevice,我導入了libs/xbee-java-library-1.2.1.jar

PS:代碼啓動與此:

package com.digi.xbee.example; 

    import com.digi.xbee.api.WiFiDevice; 
    import com.digi.xbee.api.XBeeDevice; 
    import com.digi.xbee.api.exceptions.XBeeException; 
    import com.digi.xbee.api.models.XBeeProtocol; 

public class MainApp { 
    /* Constants */ 
    // TODO Replace with the port where your sender module is connected to. 
    private static final String PORT = "/dev/ttyAMA0/"; 
    // TODO Replace with the baud rate of your sender module. 
    private static final int BAUD_RATE = 9600; 

    private static final String DATA_TO_SEND = "Hello XBee World!"; 

    public static void main(String[] args) { 
     XBeeDevice myDevice = new XBeeDevice(PORT, BAUD_RATE); 
     byte[] dataToSend = DATA_TO_SEND.getBytes(); 

     try { 
      myDevice.open(); 

      System.out.format("Sending broadcast data: '%s'", new String(dataToSend)); 

      if (myDevice.getXBeeProtocol() == XBeeProtocol.XBEE_WIFI) { 
       myDevice.close(); 
       myDevice = new WiFiDevice(PORT, BAUD_RATE); 
       myDevice.open(); 
       ((WiFiDevice)myDevice).sendBroadcastIPData(0x2616, dataToSend); 
      } else 
       myDevice.sendBroadcastData(dataToSend); 

      System.out.println(" >> Success"); 

     } catch (Exception e) { 
      System.out.println(" >> Error"); 
      e.printStackTrace(); 
      System.exit(1); 
     } 
     finally { 
      myDevice.close(); 
     } 
    } 
} 

在此先感謝。

回答

0

我已經完成了。 :D 我不得不在我的CLASSPATH絕對庫路徑,如/home/pi/.../libs/xbee-java-library-1.2.1.jar:...

之後,我有另一個錯誤,說有關RXTX lib。爲了打通這一塊,我需要做的sudo apt-get install librxtx-java因爲在這裏 java.library.path location 說,像這樣運行:

java -Djava.library.path=/usr/lib/jni -cp $XBJL_CLASS_PATH:. com.digi.xbee.example.MainApp

希望它可以幫助別人。