在Java Swing中，如何获得对窗口的Win32窗口句柄（hwnd）引用？

以下代码使您可以传递Component以获得其窗口句柄（HWND）。要确保Component具有相应的窗口句柄，请在Component上调用isLightWeight（）并验证其等于false。如果不是，请通过调用Component.getParent（）尝试将其作为父项。

Java代码：

package win32;public class Win32 {    public static native int getWindowHandle(Component c);}

头文件main.h：

#include <jni.h>#ifndef _Included_win32_Win32#define _Included_win32_Win32#ifdef __cplusplusextern "C" {#endifJNIEXPORT jint JNICALL Java_win32_Win32_getWindowHandle  (JNIEnv *, jclass, jobject);#ifdef __cplusplus}#endif#endif

C语言源main.c：

#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;}