jna test【鼠标 键盘钩子】
Java代码
package jna_test;
import com.sun.jna.platform.win32.WinDef.LRESULT;
import com.sun.jna.platform.win32.WinDef.WPARAM;
import com.sun.jna.platform.win32.WinUser.HOOKPROC;
interface LowLevelMouseProc extends HOOKPROC {
LRESULT callback( int nCode, WPARAM wParam, MOUSEHOOKSTRUCT lParam );
}
Java代码
package jna_test;
import com.sun.jna.Structure;
import com.sun.jna.platform.win32.BaseTSD.ULONG_PTR;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.win32.WinUser.POINT;
public class MOUSEHOOKSTRUCT extends Structure {
public class ByReference extends MOUSEHOOKSTRUCT implements
Structure.ByReference {
};
public POINT pt;
public HWND hwnd;
public int wHitTestCode;
public ULONG_PTR dwExtraInfo;
}
Java代码
package jna_test;
import com.sun.jna.platform.win32.Kernel32;
import com.sun.jna.platform.win32.User32;
import com.sun.jna.platform.win32.WinDef.HMODULE;
import com.sun.jna.platform.win32.WinDef.LRESULT;
import com.sun.jna.platform.win32.WinDef.WPARAM;
import com.sun.jna.platform.win32.WinUser;
import com.sun.jna.platform.win32.WinUser.HHOOK;
import com.sun.jna.platform.win32.WinUser.KBDLLHOOKSTRUCT;
import com.sun.jna.platform.win32.WinUser.LowLevelKeyboardProc;
import com.sun.jna.platform.win32.WinUser.MSG;
public class MouseLLHook {
// 鼠标钩子函数里判断按键类型的常数
public static final int WM_LBUTTONUP = 514;
public static final int WM_LBUTTONDOWN = 513;
public static final int WM_RBUTTONUP = 517;
public static final int WM_RBUTTONDOWN = 516;
public static final int WM_MOUSEHWHEEL = 526;
public static final int WM_MOUSEWHEEL = 522;
public static final int WM_MOUSEMOVE = 512;
static HHOOK mouseHHK, keyboardHHK; // 鼠标、键盘钩子的句柄
static LowLevelMouseProc mouseHook; // 鼠标钩子函数
static LowLevelKeyboardProc keyboardHook; // 键盘钩子函数
// 安装钩子
static void setHook() {
HMODULE hMod = Kernel32.INSTANCE.GetModuleHandle( null );
mouseHHK = User32.INSTANCE.SetWindowsHookEx( WinUser.WH_MOUSE_LL,
mouseHook, hMod, 0 );
keyboardHHK = User32.INSTANCE.SetWindowsHookEx( WinUser.WH_KEYBOARD_LL,
keyboardHook, hMod, 0 );
}
// 卸载钩子
static void unhook() {
User32.INSTANCE.UnhookWindowsHookEx( keyboardHHK );
User32.INSTANCE.UnhookWindowsHookEx( mouseHHK );
}
public static void main( String[] args ) {
keyboardHook = new LowLevelKeyboardProc() {
@Override
// 该函数参数的意思参考：http://msdn.microsoft.com/en-us/library/windows/desktop/ms644985(v=vs.85).aspx
public LRESULT callback( int nCode, WPARAM wParam,
KBDLLHOOKSTRUCT lParam ) {
int w = wParam.intValue();
// 按下alt键时w=.WM_SYSKEYDOWN; 按下其他大部分键时w=WinUser.WM_KEYDOWN
if ( w == WinUser.WM_KEYDOWN || w == WinUser.WM_SYSKEYDOWN )
System.out.println( "key down: vkCode = " + displayCode( lParam.vkCode ) );
else
if ( w == WinUser.WM_KEYUP || w == WinUser.WM_SYSKEYUP )
System.out.println( "key up: vkCode = " + displayCode( lParam.vkCode ) );
// 如果按下'q'退出程序，'q'的vkCode是81
if ( lParam.vkCode == 81 ) {
unhook();
System.err.println( "program terminated." );
System.exit( 0 );
}
return User32.INSTANCE.CallNextHookEx( keyboardHHK, nCode,
wParam, lParam.getPointer() );
}
private char displayCode( int vkCode ) {
/* if ( vkCode > 'a' && vkCode < 'z') {
return "" + ( char ) vkCode;
}
if ( vkCode > 'A' && vkCode < 'Z') {
return "" + ( char ) vkCode;
}*/
return (char ) vkCode ;
}
};
mouseHook = new LowLevelMouseProc() {
@Override
// 该函数参数的意思参考：http://msdn.microsoft.com/en-us/library/windows/desktop/ms644986(v=vs.85).aspx
public LRESULT callback( int nCode, WPARAM wParam,
MOUSEHOOKSTRUCT lParam ) {
switch ( wParam.intValue() ) {
case WM_MOUSEMOVE:
System.out.print( "mouse moved:" );
break;
case WM_LBUTTONDOWN:
System.out.print( "mouse left button down:" );
break;
case WM_LBUTTONUP:
System.out.print( "mouse left button up" );
break;
case WM_RBUTTONUP:
System.out.print( "mouse right button up:" );
break;
case WM_RBUTTONDOWN:
System.out.print( "mouse right button down:" );
break;
case WM_MOUSEWHEEL:
System.out.print( "mouse wheel rotated:" );
break;
}
System.out
.println( "(" + lParam.pt.x + "," + lParam.pt.y + ")" );
return User32.INSTANCE.CallNextHookEx( mouseHHK, nCode, wParam,
lParam.getPointer() );
}
};
System.out.println( "press 'q' to quit." );
setHook();
int result;
MSG msg = new MSG();
// 消息循环
// 实际上while循环一次都不执行，这些代码的作用我理解是让程序在GetMessage函数这里阻塞，不然程序就结束了。
while ( ( result = User32.INSTANCE.GetMessage( msg, null, 0, 0 ) ) != 0 ) {
if ( result == -1 ) {
System.err.println( "error in GetMessage" );
unhook();
break;
} else {
User32.INSTANCE.TranslateMessage( msg );
User32.INSTANCE.DispatchMessage( msg );
}
}
unhook();
}
}
所需要的两个jar,jna.jar platform.jar可以在
http://www.java2s.com/Code/Jar/j/jna.htm这里下载。
