package com.zovon.util;import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.geom.AffineTransform;import java.awt.image.AffineTransformOp;import java.awt.image.BufferedImage;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.List;import javax.imageio.ImageIO;/** * 该类是图片处理类 * * @author 王永丰 * 出处:http://www.cnblogs.com/zovon/p/4345501.html */public final class ImageUtil { /** 图片格式：JPG */ private static final String PICTRUE_FORMATE_JPG = "jpg"; private ImageUtil() { }/** * 生成组合头像 * * @param paths * 用户图像 * @throws IOException */ public static void getCombinationOfhead(List<String> paths) throws IOException { List<BufferedImage> bufferedImages = new ArrayList<BufferedImage>(); // 压缩图片所有的图片生成尺寸同意的 为 50x50 for (int i = 0; i < paths.size(); i++) { bufferedImages.add(ImageUtil.resize2(paths.get(i), 50, 50, true)); } int width = 112; // 这是画板的宽高 int height = 112; // 这是画板的高度 // BufferedImage.TYPE_INT_RGB可以自己定义可查看API BufferedImage outImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); // 生成画布 Graphics g = outImage.getGraphics(); Graphics2D g2d = (Graphics2D) g; // 设置背景色 g2d.setBackground(new Color(231,231,231)); // 通过使用当前绘图表面的背景色进行填充来清除指定的矩形。 g2d.clearRect(0, 0, width, height); // 开始拼凑 根据图片的数量判断该生成那种样式的组合头像目前为4中 int j = 1; for (int i = 1; i <= bufferedImages.size(); i++) { if (bufferedImages.size() == 4) { if (i <= 2) { g2d.drawImage(bufferedImages.get(i - 1), 50 * i + 4 * i - 50, 4, null); } else { g2d.drawImage(bufferedImages.get(i - 1), 50 * j + 4 * j - 50, 58, null); j++; } } else if (bufferedImages.size() == 3) { if (i <= 1) { g2d.drawImage(bufferedImages.get(i - 1), 31, 4, null); } else { g2d.drawImage(bufferedImages.get(i - 1), 50 * j + 4 * j - 50, 58, null); j++; } } else if (bufferedImages.size() == 2) { g2d.drawImage(bufferedImages.get(i - 1), 50 * i + 4 * i - 50, 31, null); } else if (bufferedImages.size() == 1) { g2d.drawImage(bufferedImages.get(i - 1), 31, 31, null); } // 需要改变颜色的话在这里绘上颜色。可能会用到AlphaComposite类 } String outPath = "E:\\b.jpg"; String format = "JPG"; ImageIO.write(outImage, format, new File(outPath)); } /** * 图片缩放 * * @param filePath * 图片路径 * @param height * 高度 * @param width * 宽度 * @param bb * 比例不对时是否需要补白 */ public static BufferedImage resize2(String filePath, int height, int width, boolean bb) { try { double ratio = 0; // 缩放比例 File f = new File(filePath); BufferedImage bi = ImageIO.read(f); Image itemp = bi.getScaledInstance(width, height, Image.SCALE_SMOOTH); // 计算比例 if ((bi.getHeight() > height) || (bi.getWidth() > width)) { if (bi.getHeight() > bi.getWidth()) { ratio = (new Integer(height)).doubleValue() / bi.getHeight(); } else { ratio = (new Integer(width)).doubleValue() / bi.getWidth(); } AffineTransformOp op = new AffineTransformOp( AffineTransform.getScaleInstance(ratio, ratio), null); itemp = op.filter(bi, null); } if (bb) { // copyimg(filePath, "D:\\img"); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.setColor(Color.white); g.fillRect(0, 0, width, height); if (width == itemp.getWidth(null)) g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); else g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, itemp.getWidth(null), itemp.getHeight(null), Color.white, null); g.dispose(); itemp = image; } return (BufferedImage) itemp; } catch (IOException e) { e.printStackTrace(); } return null; }}