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Posted on 2010-12-17 00:49 penngo 阅读(5230) 评论(2) 编辑 收藏
java本身是没有提供直接访问系统的API方法，查了下资料，要实现鼠标钩子有3种方法，
1、使用JNI方法，需要自己写C实现，比较复杂。
2、使用swt extension，直接提供了鼠标钩子的实现，但是用它调用其它windows api，没有成功，放弃了使用它。
3、使用JNA，JNA是建立在JNI 技术之上的，简化了Java访问window api的方法。
考虑到要调用其它window api的原因，选用了JNA，顺便写一个JNA实现鼠标钩子的测试例子：
  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("宋体", Font.PLAIN, 14));
lblX.setBounds(46, 33, 22, 27);
contentPane.add(lblX);
JLabel lblY = new JLabel("Y:");
lblY.setFont(new Font("宋体", 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;
}
 }
评论
# Antique Oil Painting 回复 更多评论
2010-12-17 17:19 by
怎么都是些代码啊 唉
# re: java鼠标钩子实现 回复 更多评论
2014-06-16 10:00 by
谢谢参考
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