Springboot生成二维码并下载图片png支持打包成zip
pom.xml
<!--二维码--> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>3.0.0</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>3.0.0</version> </dependency>
package com.ruoyi.common.utils; import com.google.zxing.*; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import org.apache.commons.codec.binary.Base64; import org.apache.commons.lang3.StringUtils; import org.springframework.core.io.ClassPathResource; import javax.imageio.ImageIO; import java.awt.*; import java.awt.font.FontRenderContext; import java.awt.geom.Rectangle2D; import java.awt.geom.RoundRectangle2D; import java.awt.image.BufferedImage; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.InputStream; import java.nio.file.FileSystems; import java.nio.file.Path; import java.util.HashMap; import java.util.Hashtable; import java.util.Map; /** * @author DurantSimpson * @desc 二维码工具类 * @create 2018-08-16 13:46 **/ public class QRCodeUtil { private static final String CHARSET = "UTF-8"; // 字符集格式 public static final String FORMAT_NAME = "png"; // 二维码图片格式 private static final int QRCODE_SIZE = 1500; // 二维码尺寸 private static final int WIDTH = 300; // LOGO宽度 private static final int HEIGHT = 300; // LOGO高度 /** * 生成图像 */ public static void encode(String content) { String filePath = "D://"; String fileName = "zxing.png"; int width = 200; // 图像宽度 int height = 200; // 图像高度 String format = "png";// 图像类型 Map<EncodeHintType, Object> hints = new HashMap<>(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵 Path path = FileSystems.getDefault().getPath(filePath, fileName); MatrixToImageWriter.writeToPath(bitMatrix, format, path);// 输出图像 System.out.println("输出成功."); } catch (Exception e) { e.printStackTrace(); } } /** * 生成二维码图片并转换成base64编码 * @param content * @return */ public static String encodeToBase64(String content) { int width = 200; // 图像宽度 int height = 200; // 图像高度 Map<EncodeHintType, Object> hints = new HashMap<>(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints); ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); ImageIO.write(MatrixToImageWriter.toBufferedImage(bitMatrix),"png",outputStream); String imgsrc = Base64.encodeBase64String(outputStream.toByteArray()); return "data:image/png;base64,"+imgsrc; } catch (Exception e) { e.printStackTrace(); } return ""; } /** * 解析图像 */ public static void decode() { String filePath = "D://zxing.png"; BufferedImage image; try { image = ImageIO.read(new File(filePath)); LuminanceSource source = new BufferedImageLuminanceSource(image); Binarizer binarizer = new HybridBinarizer(source); BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer); Map<DecodeHintType, Object> hints = new HashMap<>(); hints.put(DecodeHintType.CHARACTER_SET, "UTF-8"); Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码 System.out.println("图片中内容:" + result.getText()); System.out.println("encode： " + result.getBarcodeFormat()); } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) { encode("现在心情有没有好点"); //decode(); } /** * 生成二维码图片 * @param content * @param title * @return * @throws Exception */ public static BufferedImage createImage(String content, String title) throws Exception { Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M); hints.put(EncodeHintType.CHARACTER_SET, CHARSET); hints.put(EncodeHintType.MARGIN, 2); BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints); int width = bitMatrix.getWidth(); int height = bitMatrix.getHeight(); int h = height; if (StringUtils.isNotBlank(title)){ h = height + 150; } BufferedImage image = new BufferedImage(width, h, BufferedImage.TYPE_INT_RGB); for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF); } } ClassPathResource classPathResource = new ClassPathResource("static/img/logo.png");//位于resources目录下 insertImageAndTitle(image, classPathResource.getInputStream(), true, title); // 生成的二维码中添加logo return image; } /** * 二维码中添加LOGO和标题 * @param source * @param inputStream * @param needCompress 是否压缩logo true/false * @param title 标题 * @throws Exception */ public static void insertImageAndTitle(BufferedImage source, InputStream inputStream, boolean needCompress, String title) throws Exception { Image src = ImageIO.read(inputStream); int width = src.getWidth(null); int height = src.getHeight(null); if (needCompress) { // 压缩LOGO if (width > WIDTH) { width = WIDTH; } if (height > HEIGHT) { height = HEIGHT; } Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH); BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(image, 0, 0, null); // 绘制缩小后的图 g.dispose(); src = image; } // 插入LOGO Graphics2D graph = source.createGraphics(); int x = (QRCODE_SIZE - width) / 2; int y = (QRCODE_SIZE - height) / 2; graph.drawImage(src, x, y, width, height, null); //Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6); //graph.setStroke(new BasicStroke(3f)); //graph.draw(shape); //添加标题 if (StringUtils.isNotBlank(title)){ Font font = new Font(null, Font.BOLD, 80); graph.setFont(font); FontMetrics metrics = new FontMetrics(font) {}; Rectangle2D bounds = metrics.getStringBounds(title,null); int tx = (int) ((QRCODE_SIZE - bounds.getWidth()) / 2); graph.drawString(title,tx,QRCODE_SIZE+100); } graph.dispose(); } }
package com.ruoyi.project.vip.web; import com.alibaba.fastjson.JSONObject; import com.ruoyi.common.utils.QRCodeUtil; import com.ruoyi.framework.web.domain.AjaxResult; import com.ruoyi.project.vip.service.WxCardService; import org.apache.shiro.authz.annotation.RequiresAuthentication; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import javax.imageio.ImageIO; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.awt.image.BufferedImage; import java.io.OutputStream; import java.util.List; import java.util.Map; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; /** * @author DurantSimpson * @desc 微信会员卡 * @create 2019-01-24 14:23 **/ @Controller @RequestMapping("vip/wxCard") public class WxCardController { @Autowired private WxCardService service; @RequiresAuthentication @RequestMapping public String wxCard(){ return "vip/wxCard/wxCard"; } @RequestMapping(value = "/list") @ResponseBody public JSONObject list(){ return service.list(); } @RequestMapping(value = "/form") public String form(){ return "vip/wxCard/form"; } @RequestMapping(value = "/create") @ResponseBody public AjaxResult create(String notice, String prerogative, String description, String remarks){ return service.create(notice, prerogative, description, remarks); } @PostMapping( "/remove") @ResponseBody public AjaxResult remove(String ids) { return service.remove(ids); } @RequiresAuthentication @RequestMapping(value = "/storeList") public String storeList(String card_id, Model model){ model.addAttribute("card_id", card_id); return "vip/wxCard/storeList"; } @RequestMapping(value = "/createStoreList") @ResponseBody public AjaxResult createStoreList(String card_id){ return service.createStoreList(card_id); } @RequestMapping(value = "/storeListList") @ResponseBody public JSONObject storeListList(String card_id){ return service.storeListList(card_id); } @PostMapping( "/storeListRemove") @ResponseBody public AjaxResult storeListRemove(String ids) { return service.storeListRemove(ids); } /** * 下载单张二维码图片png格式 * @param request * @param response * @throws Exception */ @RequestMapping("/download") public void download(HttpServletRequest request,HttpServletResponse response) throws Exception{ String id = request.getParameter("id"); Map<String,Object> map = service.getUrlById(id); String fileName = map.get("store_name")+".png"; response.setHeader("content-disposition", "attachment;filename="+new String(fileName.getBytes("gb2312"), "ISO8859-1")); response.setHeader("content-type", "image/png"); BufferedImage image = QRCodeUtil.createImage(map.get("url").toString(), map.get("store_name").toString()); ImageIO.write(image, QRCodeUtil.FORMAT_NAME, response.getOutputStream()); } /** * 下载所有的二维码图片并打包成zip格式 * @param request * @param response * @throws Exception */ @RequestMapping("/downloadAll") public void downloadAll(HttpServletRequest request, HttpServletResponse response) throws Exception{ response.setContentType("application/zip"); response.setHeader("Content-disposition","attachment; filename=list.zip"); OutputStream outputStream = response.getOutputStream(); ZipOutputStream zipOutputStream = new ZipOutputStream(outputStream); String cardId = request.getParameter("card_id"); List<Map<String, Object>> list = service.getUrlListByCardId(cardId); for(int i = 0; i < list.size(); i++){ BufferedImage image = QRCodeUtil.createImage(list.get(i).get("url").toString(),list.get(i).get("store_name").toString()); ZipEntry entry = new ZipEntry(list.get(i).get("store_id").toString()+list.get(i).get("store_name").toString()+"."+QRCodeUtil.FORMAT_NAME); zipOutputStream.putNextEntry(entry); ImageIO.write(image, QRCodeUtil.FORMAT_NAME, zipOutputStream); zipOutputStream.flush(); } zipOutputStream.close(); outputStream.flush(); outputStream.close(); } }
