Java本地方法封裝庫 JNA

JNA（Java Native Access ）提供一組Java工具類用于在運行期動態訪問系統本地庫（native library：如Window的dll）而不需要編寫任何Native/JNI代碼。開發人員只要在一個java接口中描述目標native library的函數與結構，JNA將自動實現Java接口到native function的映射。下面是一段使用該工具的示例代碼：

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]);
    }
}

}</pre> 
  
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