今天稍微花了点时间实现了一个java的屏幕截图程序，功能简单，支持全屏截图和选择截图
用JSmooth做了个.exe程序，直接运行就可以了，
附：
程序下载
http://www.blogjava.net/Files/jht/MyScreenSnap.zipJRE1.4版本的可执行程序
http://www.blogjava.net/Files/jht/MyScreenSnap_jre1.4.zip关键的有几点
一、做一个透明效果的窗体
二、调用Robot类的捕获屏幕方法
代码比较粗糙，暂时就这样。
代码如下：
package cn.heapstack.MyScreenSnap;
import java.awt.AWTException;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.DisplayMode;
import java.awt.FlowLayout;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MenuFrame 
{
private JFrame frame;
private TranslucentFrame tframe;
private JPanel panel;
private JButton button1;
private JButton button2;
private JButton button3;
private FormListener formListener;
private Robot robot;
public static GraphicsEnvironment graphenv = GraphicsEnvironment.getLocalGraphicsEnvironment ();
public static GraphicsDevice [] screens = graphenv.getScreenDevices ();
public static DisplayMode mode = screens [0].getDisplayMode ();
public MenuFrame()
{
initComponents();
}
public void initComponents()
{
frame = new JFrame("MyScreenSnap Version:1.0 Author:jacky.jihao@gmail.com");
tframe = new TranslucentFrame();
panel = new JPanel();
try {
robot = new Robot();
} catch (AWTException e) {
e.printStackTrace();
}
button1 = new JButton("Capture Full Screen");
button2 = new JButton("Capture Selected Screen");
button3 = new JButton("Exit");
formListener = new FormListener();
button1.addActionListener(formListener);
button2.addActionListener(formListener);
button3.addActionListener(formListener);
//fullScreenFrame.setVisible(false);
tframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
tframe.setUndecorated(true);
tframe.setAlwaysOnTop(true);
tframe.setSize(2000,2000);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(null);
Dimension size = new Dimension(500,80);
frame.setPreferredSize(size );
frame.setSize(size);
frame.setLocation(300,300);
frame.setBackground(Color.black);
panel.setLocation(0, 0);
panel.setSize(size);
panel.setPreferredSize(size);
panel.setLayout(new FlowLayout());
panel.setOpaque(false);
panel.add(button1);
panel.add(button2);
panel.add(button3);
frame.add(panel);
frame.pack();
frame.show();
}
class FormListener implements ActionListener
{
public void actionPerformed(ActionEvent e) {
if(e.getSource() == button1)
{
System.out.println("Just capture the screen using a robot");
frame.hide();
Rectangle bounds = new Rectangle (0, 0, mode.getWidth (), mode.getHeight ());
BufferedImage bimg = robot.createScreenCapture(bounds);
String fileName = String.valueOf(System.currentTimeMillis())+".png";
File outputFile = new File(fileName);
try
{
ImageIO.write(bimg, "png", outputFile);
}
catch (IOException e1)
{
e1.printStackTrace();
}
frame.show();
System.out.println("File save as "+fileName);
}
else if(e.getSource() == button2)
{
System.out.println("Create a full screen frame");
if(!tframe.isShowing())
{
frame.hide();
tframe.updateBackground();
tframe.show();
frame.show();
frame.toBack();
}
else
tframe.show();
}
else if(e.getSource() == button3)
{
System.exit(0);
}
}
}
public static void main(String[] args) {
new MenuFrame();
}
}
package cn.heapstack.MyScreenSnap;
import java.awt.AWTException;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowFocusListener;
import java.awt.image.BufferedImage;
import java.awt.image.ImageFilter;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.Iterator;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
public class TranslucentFrame extends JFrame implements ComponentListener,
WindowFocusListener, MouseListener, MouseMotionListener {
private boolean flag_prepare = true;
private BufferedImage background;
private Robot robot;
private Dimension size;
private Point startPoint;
private Point lastPoint;
private int width = 0;
private int w = 0;
private int h = 0;
private int height = 0;
public TranslucentFrame() {
init();
}
private void init() {
try {
robot = new Robot();
size = Toolkit.getDefaultToolkit().getScreenSize();
} catch (AWTException e) {
e.printStackTrace();
}
startPoint = new Point();
lastPoint = new Point();
this.addWindowFocusListener(this);
this.addComponentListener(this);
this.addMouseListener(this);
this.addMouseMotionListener(this);
this.updateBackground();
}
public void updateBackground() {
background = robot.createScreenCapture(new Rectangle(0, 0, (int) size
.getWidth(), (int) size.getHeight()));
}
public void refresh() {
this.repaint();
}
public void repaint() {
Graphics g = this.getGraphics();
g.setColor(Color.red);
w = lastPoint.x - startPoint.x;
h = lastPoint.y - startPoint.y;
width = Math.abs(w);
height = Math.abs(h);
// don't need to clear Rect now, just paint the background, it feels
// good
// g.clearRect(startPoint.x, startPoint.y, width, height);
this.paintComponents(g);
if (!this.flag_prepare) {
if (((w) < 0) && ((h) < 0)) {
g.drawRect(lastPoint.x, lastPoint.y, width, height);
} else if (((w) > 0) && ((h) < 0)) {
g.drawRect(startPoint.x, lastPoint.y, width, height);
} else if (((w) < 0) && ((h) > 0)) {
g.drawRect(lastPoint.x, startPoint.y, width, height);
} else if (((w) > 0) && ((h) > 0)) {
g.drawRect(startPoint.x, startPoint.y, width, height);
}
} else {
g.drawLine(0, lastPoint.y, size.width, lastPoint.y);
g.drawLine(lastPoint.x, 0, lastPoint.x, size.height);
}
}
public void paintComponents(Graphics g) {
Point pos = this.getLocationOnScreen();
Point offset = new Point(-pos.x, -pos.y);
g.drawImage(background, offset.x, offset.y, null);
}
private static final long serialVersionUID = 3690836343560995785L;
public static void main(String[] args) {
TranslucentFrame frame = new TranslucentFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setUndecorated(true);
frame.setAlwaysOnTop(true);
frame.setSize(2000, 2000);
frame.show();
}
public void componentHidden(ComponentEvent e) {
}
public void componentMoved(ComponentEvent e) {
this.refresh();
}
public void componentResized(ComponentEvent e) {
}
public void componentShown(ComponentEvent e) {
this.refresh();
}
public void windowGainedFocus(WindowEvent e) {
this.refresh();
}
public void windowLostFocus(WindowEvent e) {
}
public void mouseMoved(MouseEvent e) {
// System.out.println(e.getX() + ":" + e.getY());
this.lastPoint.x = e.getX();
this.lastPoint.y = e.getY();
repaint();
}
public void mousePressed(MouseEvent e) {
System.out.println("Mouse pressed , set the start point,x:" + e.getX()
+ " y:" + e.getY());
if (e.getButton() == MouseEvent.BUTTON3) {
System.out.println("Get right mouse");
this.hide();
} else {
this.flag_prepare = false;
this.startPoint.x = e.getX();
this.startPoint.y = e.getY();
}
}
public void mouseReleased(MouseEvent e) {
System.out.println("Mouse released , set the last point,x:" + e.getX()
+ " y:" + e.getY());
this.flag_prepare = true;
// save the picture
if (e.getButton() == MouseEvent.BUTTON1) {
BufferedImage bimg = null;
if (((w) < 0) && ((h) < 0)) {
//g.drawRect(lastPoint.x, lastPoint.y, width, height);
bimg = robot.createScreenCapture(new Rectangle(lastPoint.x+1, lastPoint.y+1, width-1, height-1));
} else if (((w) > 0) && ((h) < 0)) {
//g.drawRect(startPoint.x, lastPoint.y, width, height);
bimg = robot.createScreenCapture(new Rectangle(startPoint.x+1, lastPoint.y+1, width-1, height-1));
} else if (((w) < 0) && ((h) > 0)) {
//g.drawRect(lastPoint.x, startPoint.y, width, height);
bimg = robot.createScreenCapture(new Rectangle(lastPoint.x+1, startPoint.y+1, width-1, height-1));
} else if (((w) > 0) && ((h) > 0)) {
//g.drawRect(startPoint.x, startPoint.y, width, height);
bimg = robot.createScreenCapture(new Rectangle(startPoint.x+1, startPoint.y+1, width-1, height-1));
}
JFileChooser fcSave = new JFileChooser();
fcSave.setCurrentDirectory(new File(System.getProperty("user.dir")));
fcSave.setSelectedFile(null);
if (fcSave.showSaveDialog(this) != JFileChooser.APPROVE_OPTION)
return;
File file = fcSave.getSelectedFile();
String path = file.getAbsolutePath().toLowerCase();
if (!path.endsWith(".png"))
file = new File(path += ".png");
try {
ImageIO.write(bimg, "png", file);
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (this.isShowing())
repaint();
}
public void mouseClicked(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mouseDragged(MouseEvent e) {
this.lastPoint.x = e.getX();
this.lastPoint.y = e.getY();
repaint();
}
}
posted on 2007-03-29 19:19
jht 阅读(1662)
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