java实现鼠标和键盘动作后台监听，java键盘后台监听,有的时候需要我们对鼠标和

java实现鼠标和键盘动作后台监听，java键盘后台监听,有的时候需要我们对鼠标和

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```java 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```java    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();            }        }