Question

求大侠帮忙！！！jnative组件怎么样用java调用dll文件里的方法！！

Answer 1

public class TestHello {
public native void displayHelloWorld();
public native int sum(int a, int b);

static {
System.loadLibrary("testhello"); //装载dll文件
}

public static void main(String[] args) {
TestHello th = new TestHello();
int y = new TestHello().sum(2, 4);
System.out.println("y=" + y);
th.displayHelloWorld();
}
}

//下面是DLL文件的源码
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class TestHello */

#ifndef _Included_TestHello
#define _Included_TestHello
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: TestHello
* Method: displayHelloWorld
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_TestHello_displayHelloWorld
(JNIEnv *, jobject);

/*
* Class: TestHello
* Method: sum
* Signature: (II)I
*/
JNIEXPORT jint JNICALL Java_TestHello_sum
(JNIEnv *, jobject, jint, jint);

#ifdef __cplusplus
}
#endif
#endif