JNI调用dll，报错dll中找不到函数

Question

I am tring to use opencv and java for face detection, and in that pursit i found this "JNI2OPENCV" file....but i am confused on how to make it work, can anyone help me?

http://img519.imageshack.us/img519/4803/askaj.jpg

and the following is the FaceDetection.java

class JNIOpenCV {
    static {
        System.loadLibrary("JNI2OpenCV");
    }
    public native int[] detectFace(int minFaceWidth, int minFaceHeight, String cascade, String filename);
}

public class FaceDetection {
    private JNIOpenCV myJNIOpenCV;
    private FaceDetection myFaceDetection;

    public FaceDetection() {
        myJNIOpenCV = new JNIOpenCV();
        String filename = "lena.jpg";
        String cascade = "haarcascade_frontalface_alt.xml";

    int[] detectedFaces = myJNIOpenCV.detectFace(40, 40, cascade, filename);
    int numFaces = detectedFaces.length / 4;

        System.out.println("numFaces = " + numFaces);
        for (int i = 0; i < numFaces; i++) {
            System.out.println("Face " + i + ": " + detectedFaces[4 * i + 0] + " " + detectedFaces[4 * i + 1] + " " + detectedFaces[4 * i + 2] + " " + detectedFaces[4 * i + 3]);
        }
    }

    public static void main(String args[]) {
        FaceDetection myFaceDetection = new FaceDetection();   
    }
}

Exception in thread "main" java.lang.UnsatisfiedLinkError: FaceDetection.JNIOpenCV.detectFace(IILjava/lang/String;Ljava/lang/String;)[I
at FaceDetection.JNIOpenCV.detectFace(Native Method)
at FaceDetection.FaceDetection.(FaceDetection.java:19)
at FaceDetection.FaceDetection.main(FaceDetection.java:29)
Java Result: 1
BUILD SUCCESSFUL (total time: 2 seconds)

Answer 1

检查你的函数名、参数列表、调用约定、参数类型