有的时候需要我们对鼠标和键盘的动作(鼠标的移动，键盘的点击)进行监听，比如按键记录，鼠标坐标记录等。

我们使用JNA来实现以上的操作

tips：JNA类库使用一个很小的本地类库sub 动态的调用本地代码。程序员只需要使用一个特定的java接口描述一下将要调用的本地代码的方法的结构和一些基本属性。这样就省了为了适配多个平台而大量的配置和编译代码。因为调用的都是JNA提供的公用jar 包中的接口。

首先我们实现监听鼠标的代码如下

package getInfo;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.Date;

import com.sun.jna.Structure;

import com.sun.jna.examples.win32.Kernel32;

import com.sun.jna.examples.win32.User32;

import com.sun.jna.examples.win32.User32.HHOOK;

import com.sun.jna.examples.win32.User32.MSG;

import com.sun.jna.examples.win32.W32API.HMODULE;

import com.sun.jna.examples.win32.W32API.LRESULT;

import com.sun.jna.examples.win32.W32API.WPARAM;

import com.sun.jna.examples.win32.User32.HOOKPROC;

public class MouseHook implements Runnable{

public static final int WM_MOUSEMOVE = 512;

private static HHOOK hhk;

private static LowLevelMouseProc mouseHook;

final static User32 lib = User32.INSTANCE;

private boolean [] on_off=null;

public MouseHook(boolean [] on_off){

this.on_off = on_off;

}

public interface LowLevelMouseProc extends HOOKPROC {

LRESULT callback(int nCode, WPARAM wParam, MOUSEHOOKSTRUCT lParam);

}

public static class MOUSEHOOKSTRUCT extends Structure {

public static class ByReference extends MOUSEHOOKSTRUCT implements

Structure.ByReference {

};

public User32.POINT pt;

public int wHitTestCode;

public User32.ULONG_PTR dwExtraInfo;

}

public void run() {

HMODULE hMod = Kernel32.INSTANCE.GetModuleHandle(null);

mouseHook = new LowLevelMouseProc() {

public LRESULT callback(int nCode, WPARAM wParam,

MOUSEHOOKSTRUCT info) {

SimpleDateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");

SimpleDateFormat df2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String fileName=df1.format(new Date());

String time=df2.format(new Date());

BufferedWriter bw1=null;

BufferedWriter bw2=null;

try {

bw1=new BufferedWriter(new FileWriter(new File(".//log//"+fileName+"_Mouse.txt"),true));

bw2=new BufferedWriter(new FileWriter(new File(".//log//"+fileName+"_Common.txt"),true));

} catch (IOException e) {

e.printStackTrace();

}

if (on_off[0] == false) {

System.exit(0);

}

if (nCode >= 0) {

switch (wParam.intValue()) {

case MouseHook.WM_MOUSEMOVE:

try {

bw1.write(time+" #### "+"x=" + info.pt.x

+ " y=" + info.pt.y+"\r\n");

bw2.write(time+" #### "+"x=" + info.pt.x

+ " y=" + info.pt.y+"\r\n");

bw1.flush();

bw2.flush();

} catch (IOException e) {

e.printStackTrace();

}

}

}

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);

}

}

能够在鼠标移动的时候输出鼠标的坐标位置

接下来是监听键盘的代码

package getInfo;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.Date;

import com.sun.jna.examples.win32.Kernel32;

import com.sun.jna.examples.win32.User32;

import com.sun.jna.examples.win32.User32.HHOOK;

import com.sun.jna.examples.win32.User32.KBDLLHOOKSTRUCT;

import com.sun.jna.examples.win32.User32.LowLevelKeyboardProc;

import com.sun.jna.examples.win32.User32.MSG;

import com.sun.jna.examples.win32.W32API.HMODULE;

import com.sun.jna.examples.win32.W32API.LRESULT;

import com.sun.jna.examples.win32.W32API.WPARAM;

public class KeyboardHook implements Runnable{

private static HHOOK hhk;

private static LowLevelKeyboardProc keyboardHook;

final static User32 lib = User32.INSTANCE;

private boolean [] on_off=null;

public KeyboardHook(boolean [] on_off){

this.on_off = on_off;

}

public void run() {

HMODULE hMod = Kernel32.INSTANCE.GetModuleHandle(null);

keyboardHook = new LowLevelKeyboardProc() {

public LRESULT callback(int nCode, WPARAM wParam, KBDLLHOOKSTRUCT info) {

SimpleDateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");

SimpleDateFormat df2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String fileName=df1.format(new Date());

String time=df2.format(new Date());

BufferedWriter bw1=null;

BufferedWriter bw2=null;

try {

bw1=new BufferedWriter(new FileWriter(new File(".//log//"+fileName+"_Keyboard.txt"),true));

bw2=new BufferedWriter(new FileWriter(new File(".//log//"+fileName+"_Common.txt"),true));

} catch (IOException e) {

e.printStackTrace();

}

if (on_off[0] == false) {

System.exit(0);

}

try {

bw1.write(time+" #### "+info.vkCode+"\r\n");

bw2.write(time+" #### "+info.vkCode+"\r\n");

bw1.flush();

bw2.flush();

} catch (IOException e) {

e.printStackTrace();

}

return lib.CallNextHookEx(hhk, nCode, wParam, info.getPointer());

}

};

hhk = lib.SetWindowsHookEx(User32.WH_KEYBOARD_LL, keyboardHook, 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);

}

}

最后是获取进程信息的代码

package getInfo;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.text.SimpleDateFormat;

import java.util.Date;

public class ProcessInfo implements Runnable{

private boolean [] on_off=null;

public ProcessInfo(boolean [] on_off){

this.on_off = on_off;

}

public void run() {

BufferedReader input = null;

Process process = null;

BufferedWriter bw=null;

SimpleDateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");

SimpleDateFormat df2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String fileName=null;

String time=null;

try {

while(on_off[0]){

fileName=df1.format(new Date());

time=df2.format(new Date());

bw=new BufferedWriter(new FileWriter(new File(".//log//"+fileName+"_ProcessInfo.txt"),true));

Thread.sleep(60000);

process = Runtime.getRuntime().exec("cmd.exe /c tasklist");

input =new BufferedReader(

new InputStreamReader(process.getInputStream()));

String line = " ";

int i=0;

input.readLine();

input.readLine();

input.readLine();

while ((line = input.readLine()) != null) {

bw.write(time+" #### "+line+"\r\n");

bw.flush();

i++;

}

}

} catch (Exception e) {

e.printStackTrace();

} finally{

try {

bw.close();

input.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

开启上述线程的类

package getInfo;

import java.awt.AWTException;

import java.awt.Image;

import java.awt.MenuItem;

import java.awt.PopupMenu;

import java.awt.SystemTray;

import java.awt.Toolkit;

import java.awt.TrayIcon;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class Monitor {

public Monitor() {

boolean [] on_off={true};

new Thread(new ProcessInfo(on_off)).start();

new Thread(new KeyboardHook(on_off)).start();

new Thread(new MouseHook(on_off)).start();

final TrayIcon trayIcon;

if (SystemTray.isSupported()) {

SystemTray tray = SystemTray.getSystemTray();

Image image = Toolkit.getDefaultToolkit().getImage(".//lib//monitor.png");

ActionListener exitListener = new ActionListener() {

public void actionPerformed(ActionEvent e) {

System.out.println("Exiting...");

System.exit(0);

}

};

PopupMenu popup = new PopupMenu();

MenuItem defaultItem = new MenuItem("Exit");

defaultItem.addActionListener(exitListener);

popup.add(defaultItem);

trayIcon = new TrayIcon(image, "monitor", popup);

ActionListener actionListener = new ActionListener() {

public void actionPerformed(ActionEvent e) {

trayIcon.displayMessage("Action Event",

"An Action Event Has Been Peformed!",

TrayIcon.MessageType.INFO);

}

};

trayIcon.setImageAutoSize(true);

trayIcon.addActionListener(actionListener);

try {

tray.add(trayIcon);

} catch (AWTException e1) {

e1.printStackTrace();

}

}

}

public static void main(String[] args) {

new Monitor();

}

}