java.lang.NoClassDefFoundError：JVideoOCR

Question

公共类JVideoOCR扩展了Observable {     public static final int STATUS_DOCUMENT_REMOVED = 1;

public native boolean init();

public native boolean terminate();
public native boolean startRead();
public native boolean stopRead();

static { 

    System.loadLibrary("JVideoOCR"); }

IOCRDataHandler dataHandler = null;

public void setOCRDataHandler(IOCRDataHandler handler)
{
    dataHandler = handler;
}

public void MRZDataCallback(MRZData data)
{
    if (dataHandler != null)
        dataHandler.handleOCRData(data);
}


private void returnStatus(int status)
{
    switch (status)
    {
    case STATUS_DOCUMENT_REMOVED:
        setChanged() ;
        notifyObservers(new Integer(2)) ;
        break;
    }
}

}

这段代码工作正常，将java文件转换为默认包，但是如果我将这个java文件转移到打包它不能正常工作。