java调用dll

java调用dll

首选写dll

# include <Windows.h>
_declspec(dllexport) char* go(char *ch)
{ 
	MessageBox(NULL, TEXT(ch), TEXT("你好"), MB_OK);
	return "来自dll的问候";
}

注意改成动态库再生成

java调用

复制生成的dll到java项目的根目录

然后写调用代码

import com.sun.jna.Library;
import com.sun.jna.Native;

public class JNAUtilsTest {
    public interface Dll extends Library {
        JNAUtilsTest.Dll INSTANCE = (JNAUtilsTest.Dll) Native.loadLibrary("go", JNAUtilsTest.Dll.class);// 加载动态库文件
        String go(String s);
    }
    
    public static void main(String[] args){
        System.setProperty("jna.encoding", "GBK");//解决中文乱码
        String go = Dll.INSTANCE.go("777");
        System.out.println(go);
    }
    }

结果: