JNA(Java Native Access)提供一组Java工具类用于在运行期动态访问系统本地库(native library:如Window的dll)而不需要编写任何Native/JNI代码。开发人员只要在一个java接口中描述目标native library的函数与结构,JNA将自动实现Java接口到native function的映射。下面是一段使用该工具的示例代码:
- import com.sun.jna.Library;
- import com.sun.jna.Native;
- import com.sun.jna.Platform;
- /** Simple example of native library declaration and usage. */
- public class HelloWorld {
- public interface CLibrary extends Library {
- CLibrary INSTANCE = (CLibrary)
- Native.loadLibrary((Platform.isWindows() ? "msvcrt" : "c"),
- CLibrary.class);
- void printf(String format, Object... args);
- }
- public static void main(String[] args) {
- CLibrary.INSTANCE.printf("Hello, World\n");
- for (int i=0;i < args.length;i++) {
- CLibrary.INSTANCE.printf("Argument %d: %s\n", i, args[i]);
- }
- }
- }