jnative 使用

下载地址:

JNative_1.4RC2_src.zip : http://jaist.dl.sourceforge.net/sourceforge/jnative/JNative_1.4RC2_src.zip

JNative.jar : http://nchc.dl.sourceforge.net/sourceforge/jnative/JNative.jar

如果以上版本不能完成下载,说明版本有可能更新,请从以下地址中下载:

Resource URL: http://jnative.sourceforge.net/ 

Source Code: http://sourceforge.net/projects/jnative 

Detailed Review: http://jnative.free.fr 

JavaDOC： http://jnative.free.fr/docs/

JNative相对于其它同类开源组件的优点:

1.容易使用

2.对数据类型的处理做的出色

3.支持CallBack

下面以一个小Demo来学习一下JNative:

1.理解文件用途

JNative_1.4RC2_src.zip是JNative源代码的压缩包把它解压后从中找到libJNativeCpp.so和JNativeCpp.dll两个文件.JNativeCpp.dll应用在Windows平台下.把它放在c:windowssystem32目录下.libJNativeCpp.so应用在Linux平台下.放在哪个目录,这个我不知道.

把JNative.jar加入到所需的工程中.

把要调用的dll文件也放在c:windowssystem32目录下, 这个目录存在一个文件，

2.测试类

package sms;

import org.xvolks.jnative.JNative;
import org.xvolks.jnative.exceptions.NativeException;
import org.xvolks.jnative.pointers.Pointer;
import org.xvolks.jnative.pointers.memory.MemoryBlockFactory;

public class SystemTime extends org.xvolks.jnative.util.Kernel32.SystemTime {
        public short wYear;
        public short wMonth;
        public short wDayOfWeek;
        public short wDay;
        public short wHour;
        public short wMinute;
        public short wSecond;
        public short wMilliseconds;
       /**
        * 分配内存，并返回指针
        */
       public Pointer createPointer() throws NativeException {
           pointer = new Pointer(MemoryBlockFactory.createMemoryBlock(getSizeOf()));
           return pointer;
       }

       /**
        * 内存大小
        */
       public int getSizeOf(){
           return 8 * 2;
       }

       /**
        * 获取通过内存指针解析出结果
        */
       public SystemTime getValueFromPointer() throws NativeException {
           wYear = getNextShort();
           wMonth = getNextShort();
           wDayOfWeek = getNextShort();
           wDay = getNextShort();
           wHour = getNextShort();
           wMinute = getNextShort();
           wSecond = getNextShort();
           wMilliseconds = getNextShort();
           return this;
       }

       public SystemTime() throws NativeException{
           super();
           createPointer();
       }

       public String toString(){
           return wYear + "/" + wMonth + "/" + wDay + " at + " + wHour + ":" + wMinute + ":" + wSecond + ":" + wMilliseconds;
       }

       public static SystemTime GetSystemTime() throws NativeException, IllegalAccessException {
           // 创建对象
           JNative nGetSystemTime = new JNative("Kernel32.dll", "GetSystemTime");

           //GetSystemTime  是dll中的方法
           SystemTime systemTime = new SystemTime();
           // 设置参数
           nGetSystemTime.setParameter(0, systemTime.getPointer());
           //执行方法
           nGetSystemTime.invoke();
           // 解析结构指针内容
           return systemTime.getValueFromPointer();
       }

       public static void main(String[] args) throws NativeException, IllegalAccessException{
           System.err.println(GetSystemTime());

       }

}