我已經在Windows中安裝了用於安裝鍵盤掛鉤的JNA代碼(使用JNA示例)。代碼編譯和一切,我得到安裝鉤子(我成功處理鉤),我也可以卸載鉤成功。但是,當我按下鍵盤上的任何鍵時,回叫將永遠不會被調用。這裏是我的代碼(大部分是類型定義從JNA例子了,轉到「主」直接對我而言)Windows中的JNA鍵盤掛鉤
import com.sun.jna.IntegerType;
import com.sun.jna.Pointer;
import com.sun.jna.PointerType;
import com.sun.jna.Structure;
import com.sun.jna.FromNativeContext;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.ptr.PointerByReference;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.StdCallLibrary.StdCallCallback;
import com.sun.jna.Native;
import com.sun.jna.Platform;
import com.sun.jna.Library;
import com.sun.jna.win32.W32APITypeMapper;
import com.sun.jna.win32.W32APIFunctionMapper;
import java.util.Map;
import java.util.HashMap;
public class HelloWorld {
static Map UNICODE_OPTIONS = new HashMap() {
{
put("type-mapper", W32APITypeMapper.UNICODE);
put("function-mapper", W32APIFunctionMapper.UNICODE);
}
};
public static class LONG_PTR extends IntegerType {
public LONG_PTR() { this(0); }
public LONG_PTR(long value) { super(Pointer.SIZE, value); }
}
public static class UINT_PTR extends IntegerType {
public UINT_PTR() { super(Pointer.SIZE); }
public UINT_PTR(long value) { super(Pointer.SIZE, value); }
public Pointer toPointer() { return Pointer.createConstant(longValue()); }
}
public static class ULONG_PTR extends IntegerType {
public ULONG_PTR() { this(0); }
public ULONG_PTR(long value) { super(Pointer.SIZE, value); }
}
public static class LRESULT extends LONG_PTR {
public LRESULT() { this(0); }
public LRESULT(long value) { super(value); }
}
public static class WPARAM extends UINT_PTR {
public WPARAM() { this(0); }
public WPARAM(long value) { super(value); }
}
public static class LPARAM extends LONG_PTR {
public LPARAM() { this(0); }
public LPARAM(long value) { super(value); }
}
public static class KBDLLHOOKSTRUCT extends Structure {
public int vkCode;
public int scanCode;
public int flags;
public int time;
public ULONG_PTR dwExtraInfo;
}
static HANDLE INVALID_HANDLE_VALUE = new HANDLE() {
{ super.setPointer(Pointer.createConstant(-1)); }
public void setPointer(Pointer p) {
throw new UnsupportedOperationException("Immutable reference");
}
};
public static class HANDLE extends PointerType {
public Object fromNative(Object nativeValue, FromNativeContext context) {
Object o = super.fromNative(nativeValue, context);
if (INVALID_HANDLE_VALUE.equals(o))
return INVALID_HANDLE_VALUE;
return o;
}
}
public static class HHOOK extends HANDLE { }
public static class HINSTANCE extends HANDLE { }
public static class HMODULE extends HINSTANCE { }
public interface User32 extends StdCallLibrary {
User32 INSTANCE = (User32)Native.loadLibrary("user32", User32.class, UNICODE_OPTIONS);
static final int WH_KEYBOARD_LL = 13;
public static interface HOOKPROC extends StdCallCallback {
LRESULT callback(int nCode, WPARAM wParam, KBDLLHOOKSTRUCT lParam);
}
HHOOK SetWindowsHookEx(int idHook, HOOKPROC lpfn, HMODULE hMod, int dwThreadId);
LRESULT CallNextHookEx(HHOOK idHook, int nCode, WPARAM wParam, LPARAM lParam);
LRESULT CallNextHookEx(HHOOK idHook, int nCode, WPARAM wParam, Pointer lParam);
boolean UnhookWindowsHookEx(HHOOK idHook);
}
public interface Kernel32 extends StdCallLibrary {
Kernel32 INSTANCE = (Kernel32)Native.loadLibrary("kernel32", Kernel32.class, UNICODE_OPTIONS);
HMODULE GetModuleHandle(String name);
}
public static HHOOK hHook;
public static User32.HOOKPROC lpfn;
public static volatile boolean quit = false;
public static void main(String[] args) throws Exception {
HMODULE hMod = Kernel32.INSTANCE.GetModuleHandle(null);
System.out.println(hMod);
lpfn = new User32.HOOKPROC() {
public LRESULT callback(int nCode, WPARAM wParam, KBDLLHOOKSTRUCT lParam) {
System.out.println("here");
quit = true;
return User32.INSTANCE.CallNextHookEx(hHook, nCode, wParam, lParam.getPointer());
}
};
hHook = User32.INSTANCE.SetWindowsHookEx(User32.WH_KEYBOARD_LL, lpfn, hMod, 0);
System.out.println(hHook);
if(hHook != null)
System.out.println("Keyboard hooked, type anything to quit");
while(!quit) {
Thread.sleep(100);
}
if(User32.INSTANCE.UnhookWindowsHookEx(hHook))
System.out.println("Unhooked");
}
}
我已經做了鍵盤/鼠標鉤子多次使用C++和C#中過去。這是我第一次嘗試使用Java,而我只是不知道我是否正確導入並映射了庫。有任何想法嗎?
謝謝。
鋸使用的GetMessage/DispatchMessage函數另一個例子,雖然從來沒有想過有什麼用鍵盤鉤子本身(我從來不需要它們在C++/C#中)。真的很感謝你的幫助McDowell,我再次得到了我的理智:) – temp 2010-06-20 15:00:39
如何獲得com.sun.jna.examples.win32?我無法從jna.jar或platform.jar中找到它。請告訴我。謝謝。 – 2011-05-06 21:26:41
@強李 - 我寫這個代碼反對JNA 3.0.9;示例類位於'examples.jar'中 – McDowell 2011-05-07 08:46:20