二维码生成. 文字生成图片. 多张图片合并方法及临时合成图片并下载
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package com.easyrail.eam.controller; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.font.FontRenderContext; import java.awt.geom.AffineTransform; import java.awt.geom.Rectangle2D; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; import javax.imageio.stream.ImageOutputStream; import com.easyrail.eam.itemManage.UpFileRoute; import com.google.zxing.BarcodeFormat; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; /** *二维码生成. 文字生成图片. 多张图片合并方法 */ public class CreateFile { private static final int BLACK = 0xFF000000; private static final int WHITE = 0xFFFFFFFF; private static final int WIDTH = 300; private static final int HEIGHT = 300; /** * 把生成的二维码存入到图片中 * * @param matrix * zxing包下的二维码类 * @return */ public static BufferedImage toBufferedImage(BitMatrix matrix) { int width = matrix.getWidth(); int height = matrix.getHeight(); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE); } } return image; } /** * 生成二维码并写入文件 * * @param content * 扫描二维码的内容 * @param format * 图片格式 jpg * @param file * 文件 * @throws Exception */ public static void writeToFile(String content, String format, File file) throws Exception { MultiFormatWriter multiFormatWriter = new MultiFormatWriter(); @SuppressWarnings("rawtypes") Map hints = new HashMap(); // 设置UTF-8, 防止中文乱码 hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); // 设置二维码四周白色区域的大小 hints.put(EncodeHintType.MARGIN, 1); // 设置二维码的容错性 hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 画二维码 BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints); BufferedImage image = toBufferedImage(bitMatrix); if (!ImageIO.write(image, format, file)) { throw new IOException("不能生产此格式" + format + " 的" + file); } } /** * 把文字写成图片 * * @param str * 文字 * @param filePath * 产生的图片位置 * @param width * 宽 * @param font 字体设置 * @param filename 图片名称(需带后缀) * @return * @throws IOException */ public static BufferedImage create(String str, String filePath, int width, Font font, String filename) throws IOException { // 获取font的样式应用在str上的整个矩形 Rectangle2D r = font.getStringBounds(str, new FontRenderContext( AffineTransform.getScaleInstance(1, 1), false, false)); // int a=(int) Math.round(r.getWidth()%WIDTH==0?r.getWidth()/WIDTH:r.getWidth()/WIDTH+1)+1;//这里可以自动获取宽度并根据照片宽度进行换行输出文字 String[] arrys=str.split("#"); int a=arrys.length; int stringlength=(int) Math.round(r.getWidth()/str.length()); int unitHeight = (int) Math.floor(r.getHeight());// 获取单个字符的高度 int height = unitHeight*(a+1) + 3*a;// 把单个字符的高度+3保证高度绝对能容纳字符串作为图片的高度 String fileName = filename; String path = filePath + "/" + fileName; File file = new File(path); BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g2 = (Graphics2D) bi.createGraphics(); g2.setBackground(Color.WHITE); g2.clearRect(0, 0, width, height); g2.setFont(font); g2.setPaint(Color.black); FontRenderContext context = g2.getFontRenderContext(); Rectangle2D bounds = font.getStringBounds(str, context); double x = (width - (bounds.getWidth())/a) / 3; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); int startX = 0; int startY = (int)(bounds.getHeight()+3); startX = (int)x; for (int i = 0; i <a; i++) { g2.drawString(arrys[i], startX, startY); /*if (i == a-1) {//画文字 g2.drawString(str.substring((int)(r.getWidth()/a)*i/stringlength, str.length()), startX, startY); } else { g2.drawString(str.substring((int)((r.getWidth()/a)*i/stringlength), (int)((r.getWidth()/a)*(i+1)/stringlength)), startX, startY); }*/ startY = startY + (int)(bounds.getHeight()+3); } // try { // ImageIO.write(bi, "jpg", file); // } catch (IOException e) { // e.printStackTrace(); // } return bi; } /** * 图片拼接 * * @param files * 要拼接的文件列表 * @param type * 1 横向拼接, 2 纵向拼接 * @param filePath 生成的路径 * @param name 图片的名称(需带后缀) * @return */ public static boolean merge(String[] files, int type, String filePath,String name) { int len = files.length; if (len < 1) { System.out.println("图片数量小于1"); return false; } File[] src = new File[len]; BufferedImage[] images = new BufferedImage[len]; int[][] ImageArrays = new int[len][]; for (int i = 0; i < len; i++) { try { src[i] = new File(files[i]); images[i] = ImageIO.read(src[i]); } catch (Exception e) { e.printStackTrace(); return false; } int width = images[i].getWidth(); int height = images[i].getHeight(); ImageArrays[i] = new int[width * height];// 从图片中读取RGB ImageArrays[i] = images[i].getRGB(0, 0, width, height, ImageArrays[i], 0, width); } int newHeight = 0; int newWidth = 0; for (int i = 0; i < images.length; i++) { // 横向 if (type == 1) { newHeight = newHeight > images[i].getHeight() ? newHeight : images[i].getHeight(); newWidth += images[i].getWidth(); } else if (type == 2) {// 纵向 newWidth = newWidth > images[i].getWidth() ? newWidth : images[i].getWidth(); newHeight += images[i].getHeight(); } } System.out.println("拼接后图像宽度:" + newWidth); System.out.println("拼接后图像高度:" + newHeight); if (type == 1 && newWidth < 1) { System.out.println("拼接后图像宽度小于1"); return false; } if (type == 2 && newHeight < 1) { System.out.println("拼接后图像高度小于1"); return false; } // 生成新图片 try { BufferedImage ImageNew = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB); int height_i = 0; int width_i = 0; for (int i = 0; i < images.length; i++) { if (type == 1) { ImageNew.setRGB(width_i, 0, images[i].getWidth(), newHeight, ImageArrays[i], 0, images[i].getWidth()); width_i += images[i].getWidth(); } else if (type == 2) { ImageNew.setRGB(0, height_i, newWidth, images[i].getHeight(), ImageArrays[i], 0, newWidth); height_i += images[i].getHeight(); } } File outFile = new File(filePath,name); if(!outFile.isDirectory()){ outFile.mkdirs(); } ImageIO.write(ImageNew, "jpg", outFile);// 写图片 return true; } catch (Exception e) { e.printStackTrace(); return false; } } public static InputStream pin(BufferedImage image,String file,int type, String filePath,String name){ File src = new File(file); BufferedImage[] images = new BufferedImage[2]; int[][] ImageArrays = new int[2][]; try { images[0] = ImageIO.read(src); images[1]=image; } catch (Exception e) { e.printStackTrace(); } for(int i=0;i<2;i++){ int width = images[i].getWidth(); int height = images[i].getHeight(); ImageArrays[i] = new int[width * height];// 从图片中读取RGB ImageArrays[i] = images[i].getRGB(0, 0, width, height, ImageArrays[i], 0, width); } int newHeight = 0; int newWidth = 0; for (int i = 0; i < images.length; i++) { // 横向 if (type == 1) { newHeight = newHeight > images[i].getHeight() ? newHeight : images[i].getHeight(); newWidth += images[i].getWidth(); } else if (type == 2) {// 纵向 newWidth = newWidth > images[i].getWidth() ? newWidth : images[i].getWidth(); newHeight += images[i].getHeight(); } } System.out.println("拼接后图像宽度:" + newWidth); System.out.println("拼接后图像高度:" + newHeight); if (type == 1 && newWidth < 1) { System.out.println("拼接后图像宽度小于1"); } if (type == 2 && newHeight < 1) { System.out.println("拼接后图像高度小于1"); } // 生成新图片 try { BufferedImage ImageNew = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB); int height_i = 0; int width_i = 0; for (int i = 0; i < images.length; i++) { if (type == 1) { ImageNew.setRGB(width_i, 0, images[i].getWidth(), newHeight, ImageArrays[i], 0, images[i].getWidth()); width_i += images[i].getWidth(); } else if (type == 2) { ImageNew.setRGB(0, height_i, newWidth, images[i].getHeight(), ImageArrays[i], 0, newWidth); height_i += images[i].getHeight(); } } File outFile = new File(filePath,name); if(!outFile.isDirectory()){ outFile.mkdirs(); } InputStream is=null; ByteArrayOutputStream bs=new ByteArrayOutputStream(); ImageOutputStream stream; ImageNew.flush(); try { stream=ImageIO.createImageOutputStream(bs); ImageIO.write(ImageNew, "png", stream); is=new ByteArrayInputStream(bs.toByteArray()); } catch (Exception e) { e.printStackTrace(); } return is; // ImageIO.write(ImageNew, "jpg", outFile);// 写图片 } catch (Exception e) { e.printStackTrace(); } return null; } public static void main(String[] args) throws Exception { // String[] files = { "E:/google.jpg", "E:/google2.jpg" }; // File qrcFile = new File("E:/", "google.jpg"); // writeToFile("www.google.com.hk", "jpg", qrcFile); // create("编号:ZZD-XN-1-ZJ-01#名称:美的家用变频空调#类型:吊顶式新风空调箱#厂家:美的空调#型号:SSD-0002-00009", // "E:/", WIDTH, new Font("微软雅黑", Font.LAYOUT_NO_LIMIT_CONTEXT, 20), // "google2.jpg"); // merge(files, 2, "E:/heihei","789.jpg"); String str="\\fileManage\\fileUpload\\equipQRCode\\SB-0002.png"; System.out.println(str.substring(str.lastIndexOf(UpFileRoute.equipQRCode)+12)); } //临时拼接好两张图片并输出到前台进行下载 @RequestMapping(value="/downQRCode") public ModelAndView downQRCode(HttpServletRequest request,HttpServletResponse response,Long id) throws Exception{ Equip equip=equipService.selectEquipDetail(id); String name=equip.getUrl().substring(equip.getUrl().lastIndexOf(UpFileRoute.equipQRCode)+12); response.setContentType("text/html;charset=UTF-8"); request.setCharacterEncoding("UTF-8"); BufferedInputStream bis = null; BufferedOutputStream bos = null; String ctxPath = fileUploadPath+ "\\"+UpFileRoute.equipQRCode+"\\"; BufferedImage image=CreateFile.create("编号:"+equip.getNum()+"#名称:"+equip.getEquipName()+"#类型:"+equip.getEquipTypeName()+"#厂家:"+equip.getEquipFactory()+"#型号:"+equip.getEquipModel()+"", "E:/", 300, new Font("微软雅黑", Font.LAYOUT_NO_LIMIT_CONTEXT, 20), "google2.jpg"); String downLoadPath = ctxPath +name; InputStream input=CreateFile.pin(image, downLoadPath, 2, "D:/", name); long fileLength = input.available();//这里长度必须是两个图片文件的长度,否则会出现黑色图片 response.setContentType("multipart/form-data"); response.setHeader("Content-disposition", "attachment; filename=" + new String(name.getBytes("utf-8"), "ISO8859-1")); response.setHeader("Content-Length", String.valueOf(fileLength)); bis = new BufferedInputStream(input); bos = new BufferedOutputStream(response.getOutputStream()); byte[] buff = new byte[2048]; int bytesRead; while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) { bos.write(buff, 0, bytesRead); } bis.close(); bos.close(); return null; } }
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