如何使用JNA访问自定义.lib/.dll函数?有人能提供一个例子吗?
谢谢.
示例(来自维基百科):
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"库加载它.我希望这让JNA更加清晰.
编辑:我将解释代码:您需要使用库中所需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.只需从该变量调用函数即可.