解决办法：java.lang.UnsatisfiedLinkError: org.opencv.core.Mat.n_eye(III)J

java.lang.UnsatisfiedLinkError: org.opencv.core.Mat.n_eye(III)J
  at org.opencv.core.Mat.n_eye(Native Method)
  at org.opencv.core.Mat.eye(Mat.java:402)

package taishan;
import java.io.File;
import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
public class OpenCVTest
{
  private final static String KEY_LIB_PATH = "java.library.path";
  private final static String NATIVE_DIR="D:\\OpenCVTest\\lib";
    static
    {
      System.out.println(System.getProperty(KEY_LIB_PATH));
        String fileName = NATIVE_DIR+"\\"+Core.NATIVE_LIBRARY_NAME+".dll";
        File dll = new File(fileName);
        System.out.println(Core.NATIVE_LIBRARY_NAME+" exist ? "+dll.exists());
        if (dll.exists())
        {
          System.load(fileName);
            //System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        }
    }
    public static void main(String[] args)
    {
        Mat mat = Mat.eye(3, 3, CvType.CV_8UC1);
        System.out.println("mat = "+mat.dump());
    }
}

D:\Office-3.5-project\Office-3.5\tsjdk8-bin;.
opencv_java420 exist ? true
mat = [  1,   0,   0;
   0,   1,   0;
   0,   0,   1]