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Java实现简单的截图工具

2016-12-20 13:15| 发布者: zhangjf| 查看: 470| 评论: 0

摘要: Robot.rar ~ 116KB ScreenShot.java ~ 420B package Robot_Caputer;import java.awt.AWTException;import java.awt.EventQueue;public class ScreenShot { public static void main(String a ...
Robot.rar ~ 116KB ScreenShot.java ~ 420B
  1. package Robot_Caputer;
  3. import java.awt.AWTException;
  4. import java.awt.EventQueue;
  6. public class ScreenShot {
  8. public static void main(String[] args) {
  9. EventQueue.invokeLater(new Runnable() {
  12. public void run() {
  14. try{
  15. ScreenShotWindow ssw=new ScreenShotWindow();
  16. ssw.setVisible(true);
  17. }catch(AWTException e){
  18. e.printStackTrace();
  19. }
  20. }
  21. });
  22. }
  26. }
复制代码
[文件] ScreenShotWindow.java ~ 5KB (13)
  1. package Robot_Caputer;
  2. import images.*;
  3. import java.awt.AWTException;
  4. import java.awt.Color;
  5. import java.awt.Dimension;
  6. import java.awt.Graphics;
  7. import java.awt.GraphicsDevice;
  8. import java.awt.GraphicsEnvironment;
  9. import java.awt.Image;
  10. import java.awt.Rectangle;
  11. import java.awt.Robot;
  12. import java.awt.Toolkit;
  13. import java.awt.event.MouseAdapter;
  14. import java.awt.event.MouseEvent;
  15. import java.awt.event.MouseMotionAdapter;
  16. import java.awt.image.BufferedImage;
  17. import java.awt.image.RescaleOp;
  18. import java.io.File;
  19. import java.io.IOException;
  20. import java.text.SimpleDateFormat;
  21. import java.util.Date;
  23. import javax.imageio.ImageIO;
  24. import javax.swing.JFileChooser;
  25. import javax.swing.JWindow;
  26. import javax.swing.filechooser.FileNameExtensionFilter;
  27. import javax.swing.filechooser.FileSystemView;
  29. //Jwindow 也是四大顶级组件之一，地位等同于JFrame，是一个无标题栏的窗口
  30. public class ScreenShotWindow extends JWindow {
  34. /**
  35. *
  36. */
  37. private static final long serialVersionUID = 1L;
  39. private int orgx,orgy,endx,endy;
  41. /**image的作用:
  42. * 1.获取整个屏幕的截图*/
  43. private BufferedImage image=null;
  44. private BufferedImage tempImage=null;
  45. private BufferedImage saveImage=null;
  47. private ToolsWindow tools=null;
  50. public ScreenShotWindow() throws AWTException {
  52. //获取默认屏幕设备
  53. GraphicsEnvironment environment=GraphicsEnvironment.getLocalGraphicsEnvironment();
  54. GraphicsDevice screen=environment.getDefaultScreenDevice();
  56. //获取屏幕尺寸
  57. Dimension d=Toolkit.getDefaultToolkit().getScreenSize();
  58. this.setBounds(0, 0, d.width, d.height);
  59. //获取屏幕截图
  60. Robot robot=new Robot(screen);
  61. // Robot robot=new Robot();
  63. // image=new BufferedImage((int)d.getWidth(),(int)d.getHeight(),BufferedImage.TYPE_4BYTE_ABGR);
  64. image=robot.createScreenCapture(new Rectangle(0, 0, d.width, d.height));
  66. //设置鼠标敲击的时间监听
  67. this.addMouseListener(new MouseAdapter() {
  69. //鼠标按下的事件监听
  70. @Override
  71. public void mousePressed(MouseEvent e) {
  73. //
  74. orgx=e.getX();
  75. orgy=e.getY();
  77. if(tools!=null){
  78. tools.setVisible(false);
  79. }
  80. }
  82. //鼠标抬起的事件监听
  83. @Override
  84. public void mouseReleased(MouseEvent e) {
  86. if(tools==null){
  87. tools=new ToolsWindow(ScreenShotWindow.this,e.getX(),e.getY());
  89. }else{
  90. tools.setLocation(e.getX(), e.getY());
  91. }
  92. tools.setVisible(true);
  93. tools.toFront();
  95. }
  97. });
  99. //对于鼠标移动的监听
  100. this.addMouseMotionListener(new MouseMotionAdapter() {
  102. //鼠标滑动的监听
  103. //在滑动过程中会被反复调用
  104. @Override
  105. public void mouseDragged(MouseEvent e) {
  107. endx=e.getX();
  108. endy=e.getY();
  110. //临时图像，用于缓冲屏幕区域放置屏幕闪烁
  111. Image tempImage2=createImage(ScreenShotWindow.this.getWidth(),ScreenShotWindow.this.getHeight());
  112. //用于绘图
  113. Graphics g=tempImage2.getGraphics();
  114. g.drawImage(tempImage, 0, 0,null);
  116. int x=Math.min(orgx, endx);
  117. int y=Math.min(orgy, endy);
  119. int width=Math.abs(endx-orgx)+1;
  120. int height=Math.abs(endy-orgy)+1;
  122. g.setColor(Color.RED);
  123. //保证图片矩形不被边框覆盖
  124. g.drawRect(x-1, y-1, width+1, height+1);
  126. //getSubimage(int x,int y,int w,int h)用于返回规定位置中的矩形图像到BufferedImag对象中
  127. saveImage=image.getSubimage(x, y, width, height);
  128. //用于画当前图像中的可用图像
  129. g.drawImage(saveImage, x, y, null);
  131. ScreenShotWindow.this.getGraphics().drawImage(tempImage2,
  132. 0, 0,ScreenShotWindow.this);
  134. }
  137. });
  139. }
  141. //重写了绘画的方法
  142. @Override
  143. public void paint(Graphics g) {
  145. //new RescaleOp(float[] scaleFactors, float[] offsets, RenderingHints hints)
  146. //构造一个具有所希望的缩放因子和偏移量的新 RescaleOp。
  147. //RescaleOp 是有关图像缩放的类
  148. //RescaleOp.filter(BufferedImage src,BufferedImage dest)
  149. //用于对源图像src进行缩放
  150. RescaleOp ro=new RescaleOp(0.8f,0, null);
  151. tempImage=ro.filter(image, null);
  152. g.drawImage(tempImage, 0, 0, this);
  154. }
  155. //保存图像到文件
  156. public void saveImage() throws IOException{
  157. JFileChooser jfc=new JFileChooser();
  158. jfc.setDialogTitle("保存");
  160. //文件过滤器，用户过滤可选择的文件
  161. FileNameExtensionFilter filter=new FileNameExtensionFilter("JPG", "jpg");
  162. jfc.setFileFilter(filter);
  164. //初始化一个默认文件(此文件会生成在桌面)
  166. SimpleDateFormat sdf=new SimpleDateFormat("yyyymmddHHmmss");
  167. String filename=sdf.format(new Date());
  169. File filePath=FileSystemView.getFileSystemView().getHomeDirectory();
  170. File defaultFile=new File(filePath+File.separator+filename+".jpg");
  171. jfc.setSelectedFile(defaultFile);
  173. int flag=jfc.showSaveDialog(this);
  174. if(flag==JFileChooser.APPROVE_OPTION){
  175. File file=jfc.getSelectedFile();
  176. String path=file.getPath();
  177. //检查文件后缀，放置用户忘记输入后缀或输入不正确的后缀
  178. if(!(path.endsWith(".jpg")||path.endsWith("JPG"))){
  179. path+=".jpg";
  180. }
  181. //写入文件
  182. ImageIO.write(saveImage, "jpg", new File(path));
  183. System.exit(0);
  184. }
  185. }
  187. }
复制代码
[文件] ToolsWindow.java ~ 1KB
  1. package Robot_Caputer;
  3. import java.awt.BorderLayout;
  4. import java.awt.event.ActionEvent;
  5. import java.awt.event.ActionListener;
  6. import java.io.IOError;
  7. import java.io.IOException;
  9. import javax.swing.ImageIcon;
  10. import javax.swing.JButton;
  11. import javax.swing.JToolBar;
  12. import javax.swing.JWindow;
  14. public class ToolsWindow extends JWindow{
  16. /**
  17. *
  18. */
  19. private static final long serialVersionUID = 1L;
  20. private ScreenShotWindow parent;
  22. public ToolsWindow(ScreenShotWindow parent,int x,int y) {
  24. this.parent=parent;
  25. this.init();
  26. //将组件移到(x,y)的位置
  27. this.setLocation(x, y);
  28. //调整窗口的大小来适应控件
  29. this.pack();
  30. this.setVisible(true);
  31. }
  33. private void init() {
  35. this.setLayout(new BorderLayout());
  36. JToolBar toolBar=new JToolBar("Java截图");
  39. //保存按钮
  40. JButton saveButton=new JButton(new ImageIcon("src/images/SaveIcon.gif"));
  41. saveButton.addActionListener(new ActionListener() {
  43. public void actionPerformed(ActionEvent e) {
  45. try{
  46. parent.saveImage();
  47. }catch(IOException ex1){
  48. ex1.printStackTrace();
  50. }
  51. }
  52. });
  53. toolBar.add(saveButton);
  55. //关闭按钮
  56. JButton closedButton=new JButton(new ImageIcon("src/images/closedIcon.gif"));
  57. closedButton.addActionListener(new ActionListener() {
  59. public void actionPerformed(ActionEvent e) {
  61. System.exit(0);
  62. }
  63. });
  64. toolBar.add(closedButton);
  66. this.add(toolBar, BorderLayout.NORTH);
  68. }
  69. }
复制代码
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