需要到
/projects/jna/downloads下载 jna.jar 和 platform.jar
(参考/penngo/blog/12356)：
1.[代码][Java]代码
package jna_test;
import com.sun.jna.platform.win32.*;
import com.sun.jna.platform.win32.WinUser.*;
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.HHOOK;
import com.sun.jna.platform.win32.WinUser.KBDLLHOOKSTRUCT;
import com.sun.jna.platform.win32.WinUser.LowLevelKeyboardProc;
import com.sun.jna.win32.WinUser.Mouse.LowLevelMouseProc;
import com.sun.jna.win32.WinUser.Mouse.MOUSEHOOKSTRUCT;
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：/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 = "+lParam.vkCode);
else if(w==WinUser.WM_KEYUP || w==WinUser.WM_SYSKEYUP)
System.out.println("key up: vkCode = "+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());
}
};
mouseHook = new LowLevelMouseProc() {
@Override
//该函数参数的意思参考：/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();
}
}
2.[代码]以上代码如果有两个类找不到(不知什么原因，我当时下载的版本就可以)，那就只好自己写了：
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.WinDef.LRESULT;
import com.sun.jna.platform.win32.WinDef.WPARAM;
import com.sun.jna.platform.win32.WinUser.HOOKPROC;
import com.sun.jna.platform.win32.WinUser.POINT;
interface LowLevelMouseProc extends HOOKPROC {
LRESULT callback(int nCode, WPARAM wParam, MOUSEHOOKSTRUCT lParam);
}
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;
}
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