Posted on 2010-12-17 00:49
penngo 閱讀(5239)
評(píng)論(2) 編輯 收藏
java本身是沒(méi)有提供直接訪問(wèn)系統(tǒng)的API方法，查了下資料，要實(shí)現(xiàn)鼠標(biāo)鉤子有3種方法，
1、使用JNI方法，需要自己寫(xiě)C實(shí)現(xiàn)，比較復(fù)雜。
2、使用swt extension，直接提供了鼠標(biāo)鉤子的實(shí)現(xiàn)，但是用它調(diào)用其它windows api，沒(méi)有成功，放棄了使用它。
3、使用JNA，JNA是建立在JNI 技術(shù)之上的，簡(jiǎn)化了Java訪問(wèn)window api的方法。
考慮到要調(diào)用其它window api的原因，選用了JNA，順便寫(xiě)一個(gè)JNA實(shí)現(xiàn)鼠標(biāo)鉤子的測(cè)試?yán)樱?br />
public class MouseHook extends JFrame 
{
private static final long serialVersionUID = 1L;
public static final int WM_MOUSEMOVE = 512;
public static final int WM_LBUTTONDOWN = 513;
public static final int WM_LBUTTONUP = 514;
public static final int WM_RBUTTONDOWN = 516;
public static final int WM_RBUTTONUP = 517;
public static final int WM_MBUTTONDOWN = 519;
public static final int WM_MBUTTONUP = 520;
private static HHOOK hhk;
private static LowLevelMouseProc mouseHook;
private JLabel labelX;
private JLabel labelY;
private JPanel contentPane;
public static void main(String[] args) {
final MouseHook frame = new MouseHook();
frame.setVisible(true);
final User32 lib = User32.INSTANCE;
HMODULE hMod = Kernel32.INSTANCE.GetModuleHandle(null);
mouseHook = new LowLevelMouseProc() {
public LRESULT callback(int nCode, WPARAM wParam,
MOUSEHOOKSTRUCT info) {
if (nCode >= 0) {
switch (wParam.intValue()) {
case MouseHook.WM_MOUSEMOVE:
System.err.println("in callback, x=" + info.pt.x
+ " y=" + info.pt.y);
frame.getLabelX().setText(String.valueOf(info.pt.x));
frame.getLabelY().setText(String.valueOf(info.pt.y));
}
}
return lib
.CallNextHookEx(hhk, nCode, wParam, info.getPointer());
}
};
hhk = lib.SetWindowsHookEx(User32.WH_MOUSE_LL, mouseHook, hMod, 0);
int result;
MSG msg = new MSG();
while ((result = lib.GetMessage(msg, null, 0, 0)) != 0) {
if (result == -1) {
System.err.println("error in get message");
break;
} else {
System.err.println("got message");
lib.TranslateMessage(msg);
lib.DispatchMessage(msg);
}
}
lib.UnhookWindowsHookEx(hhk);
}
public MouseHook() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel lblX = new JLabel("X:");
lblX.setFont(new Font("宋體", Font.PLAIN, 14));
lblX.setBounds(46, 33, 22, 27);
contentPane.add(lblX);
JLabel lblY = new JLabel("Y:");
lblY.setFont(new Font("宋體", Font.PLAIN, 14));
lblY.setBounds(144, 39, 17, 15);
contentPane.add(lblY);
labelX = new JLabel("");
labelX.setBounds(65, 39, 54, 15);
contentPane.add(labelX);
labelY = new JLabel("");
labelY.setBounds(160, 39, 54, 15);
contentPane.add(labelY);
}
public JLabel getLabelX() {
return labelX;
}
public void setLabelX(JLabel labelX) {
this.labelX = labelX;
}
public JLabel getLabelY() {
return labelY;
}
public void setLabelY(JLabel labelY) {
this.labelY = labelY;
}
public interface LowLevelMouseProc extends HOOKPROC {
LRESULT callback(int nCode, WPARAM wParam, MOUSEHOOKSTRUCT lParam);
}
public class Point extends Structure {
public class ByReference extends Point implements Structure.ByReference {
};
public com.sun.jna.NativeLong x;
public com.sun.jna.NativeLong y;
}
public static class MOUSEHOOKSTRUCT extends Structure {
public static class ByReference extends MOUSEHOOKSTRUCT implements
Structure.ByReference {
};
public User32.POINT pt;
public User32.HWND hwnd;
public int wHitTestCode;
public User32.ULONG_PTR dwExtraInfo;
}
}