怎么得到java句柄传给dll呢？？？？

Question

        
          怎么得到java句柄传给dll呢？？？？

Answer 1

借花献佛，网上找的
package win32;
public class Win32 {
    public static native int getWindowHandle(Component c);
}/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class win32_Win32 */#ifndef _Included_win32_Win32
#define _Included_win32_Win32
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     win32_Win32
 * Method:    getWindowHandle
 * Signature: (Ljava/awt/Component;Ljava/lang/String;)I
 */
JNIEXPORT jint JNICALL Java_win32_Win32_getWindowHandle
  (JNIEnv *, jclass, jobject);
#ifdef __cplusplus
}
#endif
#endif#include<windows.h>
#include <jni.h>
#include <jawt.h>
#include <jawt_md.h>HMODULE _hAWT = 0;JNIEXPORT jint JNICALL Java_win32_Win32_getWindowHandle
  (JNIEnv * env, jclass cls, jobject comp)
{
    HWND hWnd = 0;
    typedef jboolean (JNICALL *PJAWT_GETAWT)(JNIEnv*, JAWT*);
    JAWT awt;
    JAWT_DrawingSurface* ds;
    JAWT_DrawingSurfaceInfo* dsi;
    JAWT_Win32DrawingSurfaceInfo* dsi_win;
    jboolean result;
    jint lock;    //Load AWT Library
    if(!_hAWT)
        //for Java 1.4
        _hAWT = LoadLibrary("jawt.dll");
    if(!_hAWT)
        //for Java 1.3
        _hAWT = LoadLibrary("awt.dll");
    if(_hAWT)
    {
        PJAWT_GETAWT JAWT_GetAWT = (PJAWT_GETAWT)GetProcAddress(_hAWT, "_JAWT_GetAWT@8");
        if(JAWT_GetAWT)
        {
            awt.version = JAWT_VERSION_1_4; // Init here with JAWT_VERSION_1_3 or JAWT_VERSION_1_4
            //Get AWT API Interface
            result = JAWT_GetAWT(env, &awt);
            if(result != JNI_FALSE)
            {
                ds = awt.GetDrawingSurface(env, comp);
                if(ds != NULL)
                {
                    lock = ds->Lock(ds);
                    if((lock & JAWT_LOCK_ERROR) == 0)
                    {
                        dsi = ds->GetDrawingSurfaceInfo(ds);
                        if(dsi)
                        {
                            dsi_win = (JAWT_Win32DrawingSurfaceInfo*)dsi->platformInfo;
                            if(dsi_win)
                            {
                                hWnd = dsi_win->hwnd;
                            }
     else {
     hWnd = (HWND) -1;
     }
                            ds->FreeDrawingSurfaceInfo(dsi);
                        }
     else {
     hWnd = (HWND) -2;
     }
                        ds->Unlock(ds);
                    }
     else {
     hWnd = (HWND) -3;
     }
                    awt.FreeDrawingSurface(ds);
                }
     else {
     hWnd = (HWND) -4;
     }
            }
     else {
     hWnd = (HWND) -5;
     }
        }
     else {
     hWnd = (HWND) -6;
     }
    }
    else {
     hWnd = (HWND) -7;
    }
    return (jint)hWnd;
据说 如果是64位的，需要将返回类型改为long

Answer 2

大哥，  请看http://bbs.csdn.net/topics/390344380?page=1#post-393458923    不我想要的是直接在java中把HAND传给dll啊，     不是在dll中转换啊         上面这个是转换的，我一样不会用，

Answer 3

handle是windows相关的，java里面没有直接的api来获取，利用上面的办法用native的方法获得然后在java中使用，上面是获取，是在c里面获取，否则你没什么其他办法