Java本地方法封装库 JNA

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:

package com.sun.jna.examples;

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]);
        }
    }
}

posted on 2010-02-14 01:35  xyopensource  阅读(500)  评论(0编辑  收藏  举报

导航