java – 使用JNA链接到自定义dll

import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.Native;

/** Simple example of Windows native library declaration and usage. */
public class BeepExample {
   public interface Kernel32 extends StdCallLibrary {
       // FREQUENCY is expressed in hertz and ranges from 37 to 32767
       // DURATION is expressed in milliseconds
       public boolean Beep(int FREQUENCY,int DURATION);
       public void Sleep(int DURATION);
   }
   public static void main(String[] args) {
    Kernel32 lib = (Kernel32) Native.loadLibrary("kernel32",Kernel32.class);
    lib.Beep(698,500);
    lib.Sleep(500);
    lib.Beep(698,500);
   }
}

在这种情况下,我们从“kernel32.dll”库中加载它.
我希望这样可以使JNA更加清晰.

编辑：我会解释一下代码：您需要使用库中需要的函数定义一个接口(扩展com.sun.jna.Library).然后,调用com.sun.jna.Native.loadLibrary(“LibraryName”,InterfaceName.class).最后,将输出存储在具有接口类型的变量中.只需调用该变量的函数.