JAVA实现截屏功能 有界面 附源码

package test; import java.awt.AWTException; import java.awt.Dimension; import java.awt.Image; import java.awt.Rectangle; import java.awt.Robot; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.InputEvent; import java.awt.event.KeyEvent; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import javax.imageio.ImageIO; import javax.swing.GroupLayout; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JScrollPane; import javax.swing.KeyStroke; import javax.swing.filechooser.FileNameExtensionFilter; import com.sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGImageEncoder; public class FrameCaptuer extends JFrame { private JMenuItem jMenuItemCapture, jMenuItemClear, jMenuItemSaveAs, jMenuItemExit, jMenuOpen; private JMenuBar jMenuBar1; private JMenu jMenuAction; private JLabel jLabelShow; private JScrollPane jScrollPaneGlobe; private Image tempImage; private JPEGImageEncoder encoder = null; private JFileChooser fileChooser = new JFileChooser(); public FrameCaptuer() { //菜单条 jMenuBar1 = new JMenuBar(); //菜单 jMenuAction = new JMenu(); //把菜单加入菜单条 jMenuAction = new JMenu("操作"); jMenuBar1.add(jMenuAction); //在标签上加入滚动条 jLabelShow = new JLabel(); //滚动条 jScrollPaneGlobe = new JScrollPane(jLabelShow); this.add(jScrollPaneGlobe); /*********************************** * * 定义菜单项对像并设置快捷键且加入菜单 * */ jMenuItemCapture = new JMenuItem(); jMenuItemCapture.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK));//快捷键 jMenuItemCapture.setText("开始截屏"); jMenuAction.add(jMenuItemCapture); jMenuItemCapture.setEnabled(true);//是否被选择中 jMenuItemCapture.addActionListener(new Handler1()); jMenuItemClear = new JMenuItem("清空"); jMenuItemClear.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK)); jMenuAction.add(jMenuItemClear); jMenuItemClear.setEnabled(false);//是否被选择中 jMenuItemClear.addActionListener(new Handler2()); jMenuItemSaveAs = new JMenuItem("保存"); jMenuItemSaveAs.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK)); jMenuAction.add(jMenuItemSaveAs); jMenuItemSaveAs.setEnabled(false);//是否被选择中 jMenuItemSaveAs.addActionListener(new Handler3()); jMenuItemExit = new JMenuItem("退出"); jMenuItemExit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK)); jMenuAction.add(jMenuItemExit); jMenuItemExit.setEnabled(true);//是否被选择中 jMenuItemExit.addActionListener(new Handler4()); jMenuOpen = new JMenuItem("打开"); jMenuOpen.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_K, InputEvent.CTRL_MASK)); jMenuAction.add(jMenuOpen); jMenuOpen.setEnabled(true); jMenuOpen.addActionListener(new Handler5()); //窗体设置 this.setTitle("截屏示例"); this.setBounds(200, 200, 500, 350); GroupLayout layout = new GroupLayout(getContentPane()); // this.setLayout(null);//(layout);//用默认的布局BorderLayout //把菜单条加入窗体 this.setJMenuBar(jMenuBar1); //关闭动作 this.setVisible(true); this.setResizable(false);//设置窗口不可编辑 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } /*******************************************************8 * 监听器 * */ //截屏 class Handler1 implements ActionListener { public void actionPerformed(ActionEvent e) { Image caIm = this.createImage(); //截取当前屏幕图像 //将图像在jLabelShow中显示 jLabelShow.setIcon(new ImageIcon(tempImage = this.createImage())); //其他菜单的状态 jMenuItemSaveAs.setEnabled(true); jMenuItemClear.setEnabled(true); jMenuItemCapture.setEnabled(false); } //截取当前屏幕图像的方法 private Image createImage() { try {//截图代码开始 Image tempLocalImage = null; Robot robot = new Robot(); Dimension dime = Toolkit.getDefaultToolkit().getScreenSize(); Rectangle scrRect = new Rectangle(0, 0, dime.width, dime.height); tempLocalImage = robot.createScreenCapture(scrRect); //截图代码结束返回 return tempLocalImage; } catch (AWTException e) { e.printStackTrace(); } return null; } } //清空 class Handler2 implements ActionListener { public void actionPerformed(ActionEvent e) { jLabelShow.setIcon(null); //将jLabelShow中的图像清空 jMenuItemSaveAs.setEnabled(false); jMenuItemClear.setEnabled(false); jMenuItemCapture.setEnabled(true); } } //保存 class Handler3 implements ActionListener { public void actionPerformed(ActionEvent e) { saveImage(); } /***************************************************************************88*8 * /保存图像(重要) * * * * * * */ private void saveImage() { fileChooser = new JFileChooser(); try { int saved = fileChooser.showSaveDialog(null);//类里面调用用null,监听器里用this打开保存对话框 if (saved == JFileChooser.APPROVE_OPTION) { //获取要设置的文件名（包括路径） File saveFileName = fileChooser.getSelectedFile(); //获取要保存文件的名字 String fileName = new String(saveFileName.getPath() + ".jpg"); //1.首先创建一个输出流(从内存输出到硬盘) FileOutputStream fileOutPut = new FileOutputStream(fileName); //2.然后把输出流用JPEG编码器进行包裹，其实就是把输出流连接到编码器 encoder = JPEGCodec.createJPEGEncoder(fileOutPut); //把BufferedImage对象进行编码(有默认的保存路径) encoder.encode((BufferedImage) tempImage); fileOutPut.flush(); fileOutPut.close(); } } catch (Exception e) { e.printStackTrace(); } } } //退出 class Handler4 implements ActionListener { public void actionPerformed(ActionEvent e) { System.exit(0); } } /*************************88 * 打开 * (重要) * */ class Handler5 implements ActionListener { public void actionPerformed(ActionEvent arg0) { //添加可以接收JPG图片的过滤器 fileChooser.addChoosableFileFilter(new FileNameExtensionFilter( "JPEG图片", "jpg", "jpeg")); //1方法 fileChooser.showOpenDialog(null);//打开打开对话框 jLabelShow.setIcon(new ImageIcon(fileChooser.getSelectedFile() .getAbsolutePath()));//把图片设置到JLabel jMenuItemClear.setEnabled(true); //2方法 // fileChooser.showOpenDialog(null); // File file=fileChooser.getSelectedFile(); // // // try { // Icon image = (Icon) ImageIO.read(file); // jLabelShow.setIcon(image); // jMenuItemClear.setEnabled(true); // } catch (IOException e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } } } public static void main(String args[]) { new FrameCaptuer(); } }