一个简单的图片编辑器源代码

一个简单的图片编辑器源代码 public class Imagedit { private static JFrame frame; public static void main(String[] args) { frame = new TransformFrame(); frame.setVisible(true); // frame.add(new DivideImage(new File("D://p_head_KKKV_61160000061f2d0f.jpg"))); } public static JFrame getFrame(){ return frame; } } class TransformFrame extends JFrame implements ActionListener { JButton open = new JButton("打开"); JButton save = new JButton("保存"); JButton rote1 = new JButton("逆时针"); JButton rote = new JButton("顺时针"); JButton flipX = new JButton("水平翻转"); JButton flipY = new JButton("垂直翻转"); JButton zoomIn = new JButton("放大"); JButton zoomOut = new JButton("缩小"); public TransformFrame() { setTitle("Java图片处理"); setSize(400, 400); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); Container contentPane = getContentPane(); canvas = new TransPanel(); contentPane.add(canvas, "Center"); JPanel buttonPanel = new JPanel(); buttonPanel.add(open); open.addActionListener(this); buttonPanel.add(save); save.addActionListener(this); buttonPanel.add(rote1); rote1.addActionListener(this); buttonPanel.add(rote); rote.addActionListener(this); buttonPanel.add(flipX); flipX.addActionListener(this); buttonPanel.add(flipY); flipY.addActionListener(this); buttonPanel.add(zoomIn); zoomIn.addActionListener(this); buttonPanel.add(zoomOut); zoomOut.addActionListener(this); contentPane.add(buttonPanel, "North"); } public void actionPerformed(ActionEvent event) { Object source = event.getSource(); if (source == rote1) { canvas.setRotate1(); } if (source == rote) { canvas.setRotate(); } else if (source == flipX) { canvas.flipX(); } else if (source == flipY) { canvas.flipY(); } else if (source == zoomIn) { canvas.zoomIn(); } else if (source == zoomOut) { canvas.zoomOut(); } else if (source == save) { canvas.save(); } else if(source==open){ canvas.open(); } } private TransPanel canvas; } class TransPanel extends JPanel { JTextPane jTextPane1 = new JTextPane(); //水平翻转比例的标志。-1表示需要进行水平翻转 int m_nFlipXScale = 1; //垂直翻转比例的标志。-1表示需要进行垂直翻转 int m_nFlipYScale = 1; //旋转的角度。因为工程需要，代码中直接写成了90，可以根据具体需要动态修改，以符合实际情况 int roteAngle = 0; //缩放比例。默认的比例0表示没有翻转，具体的翻转大小通过一个方法:getZoomSize()获取 int zoomLevel = 0; public TransPanel() { img = new ImageIcon("").getImage(); } public void paintComponent(Graphics g) { super.paintComponent(g); g.drawImage(img, 0, 0, this); drawTransImage(g, img.getWidth(this), img.getHeight(this), zoomLevel); } public void drawTransImage(Graphics g, int drawx, int drawy, int zoom) { int x = 0; int y = 0; int w = img.getWidth(this); int h = img.getHeight(this); int zoomw = getZoomSize(w, zoom); int zoomh = getZoomSize(h, zoom); int xPos = 0; int yPos = 0; if (m_nFlipXScale == -1) { xPos = -zoomw; } if (m_nFlipYScale == -1) { yPos = -zoomh; } Graphics2D g2 = (Graphics2D) g; //转换坐标原点。这步不要也成，但是将当前位置转换为坐标原点后，可以节省好多计算步骤，非常好用。 //不过记得用完了以后，一定要把原点转换回来，要不然其他地方就乱了 g2.translate(drawx, drawy); if (roteAngle != 0) { g2.rotate(Math.toRadians(m_nFlipXScale * m_nFlipYScale * roteAngle), zoomw >> 1, zoomh >> 1); } //上面的m_nFlipXScale * m_nFlipYScale需要特殊说明一下:因为实际使用中，可能遇到各种组合的情况，比如 //先flipX或者flipY以后然后再旋转，这时候，图片的旋转方向就会出现错误，加上这段代码可以保证无论使用哪种组合 //操作方式，都保证在旋转图片的时候是按照顺时针的方向进行旋转。 if (m_nFlipXScale == -1) { g2.scale(-1, 1);//第一个值表示水平，-1表示等宽水平翻转，Math.abs(m_nFlipXScale)的值越大，出来的图片就越宽 } if (m_nFlipYScale == -1) { g2.scale(1, -1);//第二个值表示垂直，-1表示等高垂直翻转，Math.abs(m_nFlipYScale)的值越大，出来的图片就越高 } //显示图片 g2.drawImage(img, xPos, yPos, xPos + zoomw, yPos + zoomh, x, y, w, h, null); g2.translate(-drawx, -drawy); } //实现逆时针的方法 public void setRotate1() { roteAngle -= 90; roteAngle %= 360; repaint(); } //实现顺时针的方法 public void setRotate() { roteAngle += 90; roteAngle %= 360; repaint(); } //实现水平移动的方法 public void flipX() { m_nFlipXScale = -m_nFlipXScale; repaint(); } public void flipY() { m_nFlipYScale = -m_nFlipYScale; repaint(); } //放大的方法 public void zoomIn() { zoomLevel++; repaint(); } //缩小的方法 public void zoomOut() { zoomLevel--; repaint(); } public void open(){// JFileChooser chooser=new JFileChooser(); // chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); int result=chooser.showOpenDialog(null); if(result==JFileChooser.APPROVE_OPTION){ String filePath=chooser.getSelectedFile().getPath(); JFrame frame = Imagedit.getFrame(); frame.add(new DivideImage(new File(filePath))); img = new ImageIcon(filePath).getImage(); // System.out.println(frame); frame.setVisible(true); System.out.println(filePath); } } /** * 保存图片的方法 */ public void save() { JFileChooser fc = new JFileChooser(); int returnVal = fc.showSaveDialog(this); if (returnVal == JFileChooser.APPROVE_OPTION) { String savefile = fc.getSelectedFile().getPath(); if (savefile == null) { return; } else { String docToSave = jTextPane1.getText(); if (docToSave != null) { ObjectOutputStream fstrm = null; BufferedOutputStream ostrm = null; try { fstrm = new ObjectOutputStream(new FileOutputStream(savefile)); ostrm = new BufferedOutputStream(fstrm); byte[] bytes = null; try { bytes = docToSave.getBytes(); } catch (Exception e1) { e1.printStackTrace(); } ostrm.write(bytes); } catch (IOException io) { System.err.println("IOException: " + io.getMessage()); } finally { try { ostrm.flush(); fstrm.close(); ostrm.close(); } catch (IOException ioe) { System.err.println("IOException: " + ioe.getMessage()); } } } } } return; } public static final int getZoomSize(int sourceSize, int zoomLevel) { if (zoomLevel == 0) { return sourceSize; } else if (zoomLevel < 0) { return sourceSize / (Math.abs(zoomLevel) + 1); } else { return sourceSize * (zoomLevel + 1); } } private Image img; } 下面是截取图片类 Java代码 收藏代码 //截取图片类 public class DivideImage extends JPanel { BufferedImage image = null; int x1, y1, x2, y2; public DivideImage(File file) { super(); this.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { x1 = e.getX(); y1 = e.getY(); } public void mouseReleased(MouseEvent e) { x2 = e.getX(); y2 = e.getY(); int x = x1 < x2 ? x1 : x2; int y = y1 < y2 ? y1 : y2; int w = (x1 > x2 ? x1 : x2) - x; int h = (y1 > y2 ? y1 : y2) - y; Image image = DivideImage.this.getImageByClip(x, y, w, h); setClipboardImage2(image); x1 = y1 = x2 = y2 = 0; JOptionPane.showMessageDialog(DivideImage.this, "图片已保存 到系统粘贴板～", "图片已保存", JOptionPane.INFORMATION_MESSAGE); DivideImage.this.repaint(); } }); this.addMouseMotionListener(new MouseMotionAdapter() { public void mouseDragged(MouseEvent e) { x2 = e.getX(); y2 = e.getY(); DivideImage.this.repaint(); } }); try { image = ImageIO.read(file); } catch (IOException e) { System.out.println("请输入一个图片文件～"); } } public Image getImage() { return image; } public Image getImageByClip(int x, int y, int w, int h) { int rgbs[] = new int[w * h]; rgbs = image.getRGB(x, y, w, h, rgbs, 0, w); BufferedImage tmpImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB); tmpImage.setRGB(0, 0, w, h, rgbs, 0, w); return tmpImage; } public void paint(Graphics g) { super.paint(g); g.drawImage(image, 0, 0, this); System.out.println("(" + x1 + "," + y1 + ")(" + x2 + "," + y2 + ")"); if (x1 == 0 && y1 == 0 && x2 == 0 && y2 == 0) { return; } System.out.println("rect"); int x = x1 < x2 ? x1 : x2; int y = y1 < y2 ? y1 : y2; int w = (x1 > x2 ? x1 : x2) - x; int h = (y1 > y2 ? y1 : y2) - y; g.setColor(Color.blue); g.drawRect(x, y, w, h); } protected static void setClipboardImage2(final Image image) { Transferable trans = new Transferable() { public DataFlavor[] getTransferDataFlavors() { return new DataFlavor[]{DataFlavor.imageFlavor}; } public boolean isDataFlavorSupported(DataFlavor flavor) { return DataFlavor.imageFlavor.equals(flavor); } public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException { if (isDataFlavorSupported(flavor)) { return image; } throw new UnsupportedFlavorException(flavor); } }; Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans, null); } }