在Java中为图像添加边框
我试图创建一个图像，通过将像素从旧位置复制到新坐标，在Java上为现有图像添加边框。 到目前为止，这就是我所做的：
public static NewPic border (NewPic p, int borderWidth, Pixel borderColor) { int w = p.getWidth(); int h = p.getHeight(); Pixel src[][] = p.getBitmap(); Pixel tgt[][] = new Pixel[h][w]; for (int x = 0; x < w; x++) { for (int y = 0; y < h; y++) { tgt[y][x + y + borderWidth] = src[x][y]; // this is probably where I a messing up } } return new NewPic(tgt); } 不知道我在评论的行中做错了什么。 我是Java新手。 有人可以给我一些指导吗？
一种方法是使用基于Swing的边框。
import java.awt.*; import java.awt.image.BufferedImage; import javax.swing.*; import javax.swing.border.*; class ImageBorder { public static void main(String[] args) { Runnable r = new Runnable() { @Override public void run() { JPanel gui = new JPanel(new BorderLayout()); // to contrast the 'picture frame' border created below gui.setBorder(new LineBorder(Color.BLUE, 12)); Image image = // your image here.. new BufferedImage(400,50,BufferedImage.TYPE_INT_RGB); JLabel l = new JLabel(new ImageIcon(image)); Border b1 = new BevelBorder( BevelBorder.LOWERED, Color.LIGHT_GRAY, Color.DARK_GRAY); Border b2 = new LineBorder(Color.GRAY, 12); Border b3 = new BevelBorder( BevelBorder.LOWERED, Color.LIGHT_GRAY, Color.DARK_GRAY); Border bTemp = new CompoundBorder(b1,b2); Border b = new CompoundBorder(bTemp,b3); l.setBorder(b); gui.add(l); JOptionPane.showMessageDialog(null, gui); } }; // Swing GUIs should be created and updated on the EDT // http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html SwingUtilities.invokeLater(r); } }
您可以创建一个BorderedBufferedImage ，它接受borderThickness的int ， borderColor的Color和BufferedImage 。
该网站也可能提供一些帮助：
import java.awt.*; import javax.swing.*; import java.awt.image.BufferedImage; import javax.imageio.ImageIO; import java.io.*; import javax.swing.BorderFactory; class testImagePanel{ public static void main(String[] args){ BufferedImage image = null; ImagePanel imagePanel = null; try{ image = ImageIO.read(new File("Pictures/pl.jpg")); imagePanel = new ImagePanel(image); }catch(IOException e){ System.err.println("Trying to read in image "+e); } JFrame frame = new JFrame("Example"); frame.add(imagePanel); frame.pack(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } } public class ImagePanel extends JPanel { BufferedImage image; Dimension size; public ImagePanel(BufferedImage image) { this.image = image; this.size = new Dimension(); size.setSize(image.getWidth(), image.getHeight()); this.setBackground(Color.WHITE); this.setBorder(BorderFactory.createLineBorder(Color.RED, 1)); } @Override protected void paintComponent(Graphics g) { // Center image in this component. int x = (getWidth() - size.width)/2; int y = (getHeight() - size.height)/2; g.drawImage(image, x, y, this); } @Override public Dimension getPreferredSize() { return size; } }
我使用以下逻辑为任何图像添加边框：
BufferedImage source = ImageIO.read(original); int borderedImageWidth = width + (borderLeft * 2); int borderedImageHeight = height + (borderTop * 2); BufferedImage img = new BufferedImage(borderedImageWidth, borderedImageHeight, BufferedImage.TYPE_3BYTE_BGR); img.createGraphics(); Graphics2D g = (Graphics2D) img.getGraphics(); g.setColor(Color.YELLOW); g.fillRect(0, 0, borderedImageWidth, borderedImageHeight); g.drawImage(source, borderLeft, borderTop, width + borderLeft, height + borderTop, 0, 0, width, height, Color.YELLOW, null); File output = File.createTempFile("output", ".png"); ImageIO.write(img, "png", outputFile);
这将在黄色矩形上绘制图像，其尺寸大于图像，从而为图像提供边框。
我知道这个post是从2013年开始的，但是我遇到了这个问题，我有一个解决方案可以保留OP尝试做的事情：
public static NewPic border (NewPic p, int borderWidth, Pixel borderColor) { int w = p.getWidth(); int h = p.getHeight(); Pixel src[][] = p.getBitmap(); Pixel tgt[][] = new Pixel[h + borderWidth * 2][w + borderWidth * 2]; for (int x = 0; x < w + borderWidth; x++) { for (int y = 0; y < h + borderWidth; y++) { if (x >= borderWidth && x < w - borderWidth && y >= borderWidth && y < h - borderWidth) { tgt[x][y] = src[x - borderWidth][y - borderWidth]; } else { tgt[x][y] = borderColor; } } } return new NewPic(tgt); }