最近公司一個需要，需要把商品的優惠卷分享鏈接，生成一個二維碼然后和商品主圖合成一張，并且在新合成的主圖增加商品信息的描述，好了直接看合成后圖片的樣式

下面我就直接貼代碼，首先是Contorller層

/** * 淘寶二維碼，商品主圖，合成一張圖 * * @param pictUrl * @param request * @param response * @throws IOException */ @RequestMapping('/getTaoBaoqQRCode') public void getTaoBaoqQRCode(TaoBaoQRCode taoBaoQRCode, HttpServletRequest request, HttpServletResponse response) throws IOException { ServletOutputStream os = null; InputStream buffin = null; try { // 二維碼 String couponUlr = 'https:' + taoBaoQRCode.getCouponShareUrl();// 高額卷分享鏈接 byte[] imgByte = QrCodeUtil.createQrCode2Bytes(250, 250, couponUlr); buffin = new ByteArrayInputStream(imgByte); BufferedImage couponImage = ImageIO.read(buffin); // 商品主圖 String imageUrl = 'https:' + taoBaoQRCode.getPictUrl(); URL url = new URL(imageUrl); BufferedImage picImage = ImageIO.read(url); BufferedImage modifyImage = imageHandleUtil.mergeImage(picImage, couponImage, taoBaoQRCode.getTitle(), taoBaoQRCode.getReservePrice(), taoBaoQRCode.getZkFinalPrice()); response.setContentType('image/jpg'); os = response.getOutputStream(); ImageIO.write(modifyImage, 'jpg', os); os.flush(); } catch (Exception e) { LOGGER.error('getTaoBaoqQRCode error'); e.printStackTrace(); } finally { buffin.close(); os.close(); } }

二維碼QrCodeUtil 生成幫助類

public class QrCodeUtil { private static final int DAFAULT_WIDTH = 360; private static final int DAFAULT_HEIGHT = 360; private static final Logger LOGGER = LoggerFactory.getLogger(QrCodeUtil.class); public static String createQrCode(String text) { return createQrCode(DAFAULT_WIDTH, DAFAULT_HEIGHT, text); } public static String createQrCode(int widht, int height, String text) { HashMap<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>(); hints.put(EncodeHintType.CHARACTER_SET, 'UTF-8'); try { byte[] bytes = createQrCode2Bytes(widht, height, text); String fileName = UUID.randomUUID().toString().replaceAll('-', '') + '.png'; return UpYunClient.upload(fileName, bytes); } catch (Exception e) { LOGGER.error('create qrcode error', e); } return null; } public static byte[] createQrCode2Bytes(String text) { return createQrCode2Bytes(DAFAULT_WIDTH, DAFAULT_HEIGHT, text); } public static byte[] createQrCode2Bytes(int widht, int height, String text) { HashMap<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>(); hints.put(EncodeHintType.CHARACTER_SET, 'UTF-8'); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, widht, height, hints); ByteArrayOutputStream out = new ByteArrayOutputStream(); BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix); ImageIO.write(image, 'png', out); return out.toByteArray(); } catch (Exception e) { LOGGER.error('create qrcode error', e); } return null; } /** * 生成條形碼并已字節碼形式返回，生成的圖片格式為png * * @param contents * @param width * @param height * @return */ public static byte[] createBarcode2Byte(String contents, int width, int height) { int codeWidth = 3 + // start guard(7 * 6) + // left bars5 + // middle guard(7 * 6) + // right bars3; // end guard codeWidth = Math.max(codeWidth, width); try { BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.CODE_128, codeWidth, height, null); BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix); ByteArrayOutputStream out = new ByteArrayOutputStream(); ImageIO.write(image, 'png', out); return out.toByteArray(); } catch (Exception e) { e.printStackTrace(); } return null; }}

二維碼生成我這里用的是谷歌的看下面maven pom.xml 文件

<!-- 條形碼、二維碼生成 --> <dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>2.2</version> </dependency>

合成圖片方法如何

package com.qft.campuscircle.common.util;import java.awt.Color;import java.awt.Font;import java.awt.Graphics2D;import java.awt.RenderingHints;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.net.URL;import javax.imageio.ImageIO;import org.springframework.stereotype.Component;@Componentpublic class ImageHandleUtil { private Font font = null; private Graphics2D g = null; /** * 導入本地圖片到緩沖區 * * @param imgName * @return */ public BufferedImage loadImageLocal(String imgName) { try { return ImageIO.read(new File(imgName)); } catch (IOException e) { e.printStackTrace(); } return null; } /** * 導入網絡圖片到緩沖區 * * @param imgName * @return */ public BufferedImage loadImageUrl(String imgName) { try { URL url = new URL(imgName); return ImageIO.read(url); } catch (IOException e) { e.printStackTrace(); } return null; } /** * 生成新圖片到本地 * * @param newImage * @param img */ public void writeImageLocal(String newImage, BufferedImage img) { if (newImage != null && img != null) { try {// 目錄不存在則創建String dirUrl = newImage.substring(0, newImage.lastIndexOf(File.separator));File dir = new File(dirUrl);if (!dir.exists()) { dir.mkdirs();}File outputfile = new File(newImage);ImageIO.write(img, 'png', outputfile); } catch (IOException e) {e.printStackTrace(); } } } /** * 設定文字的字體等 * * @param fontStyle * @param fontSize */ public void setFont(String name, int style, int fontSize) { this.font = new Font(name, style, fontSize); } /** * 修改圖片,返回修改后的圖片緩沖區（只輸出一行文本）,圖片居中顯示 * * @param img * @param content * @param y * @param color * @return */ public BufferedImage modifyImage(BufferedImage img, Object content, int y, Color color) { try { g = img.createGraphics(); g.setBackground(Color.WHITE); g.setColor(color);// 設置字體顏色 g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);// 抗鋸齒 if (this.font != null)g.setFont(this.font); int width = img.getWidth();// 圖片寬度 if (content != null) {String str = content.toString();int strWidth = g.getFontMetrics().stringWidth(str);// 字體寬度g.drawString(str, (width - strWidth) / 2, y); } g.dispose(); } catch (Exception e) { e.printStackTrace(); } return img; } public BufferedImage modifyImage(BufferedImage img, Object content, int x, int y, Color color) { try { g = img.createGraphics(); g.setBackground(Color.WHITE); g.setColor(color);// 設置字體顏色 g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);// 抗鋸齒 if (this.font != null)g.setFont(this.font); if (content != null) {String str = content.toString();g.drawString(str, x, y); } g.dispose(); } catch (Exception e) { e.printStackTrace(); } return img; } /** * 將一張圖片畫在另一張圖片上 * * @param addImage 被添加的圖片 * @param sourceImg 源圖 * @param x * @param y * @param width * @param height * @return */ public BufferedImage modifyImagetogeter(BufferedImage addImage, BufferedImage sourceImg, int x, int y) { int width = addImage.getWidth(); int height = addImage.getHeight(); try { g = sourceImg.createGraphics(); g.drawImage(addImage, x, y, width, height, null); g.dispose(); } catch (Exception e) { e.printStackTrace(); } return sourceImg; } /** * * @param img1 * @param img2 * @param title 標題 * @param reservePrice 現價 * @param zkFinalPrice 折扣價 * @return BufferedImage * @throws IOException */ public BufferedImage mergeImage(BufferedImage img1, BufferedImage img2,String title,String reservePrice,String zkFinalPrice) throws IOException { Font font = new Font('微軟雅黑', Font.BOLD, 20); int w1 = img1.getWidth(); int h1 = img1.getHeight(); int w2 = img2.getWidth(); int h2 = img2.getHeight(); BufferedImage newImage = new BufferedImage(w1, h2 + h1 + h2/2, BufferedImage.TYPE_INT_RGB);// 新的圖 Graphics2D graphics = (Graphics2D) newImage.getGraphics(); graphics.setBackground(Color.WHITE); graphics.fillRect(0, 0, newImage.getWidth(), newImage.getHeight()); graphics.drawImage(img1, 0, 0, null); graphics.drawImage(img2, (newImage.getWidth()) / 2 - (w2 / 2), newImage.getHeight() - h2,null); graphics.setFont(font); graphics.setColor(Color.BLACK); int width = graphics.getFontMetrics(font).stringWidth(title); int startY = h1 + 30; if (width > newImage.getWidth()) { char[] array = title.toCharArray(); StringBuilder sb = new StringBuilder(array[0]); for (char c : array) {sb.append(c);int newWidth = graphics.getFontMetrics(font).stringWidth(sb.toString());if ((newWidth + 19) >= newImage.getWidth()) {// 準備換行 graphics.drawString(sb.toString(), 0, startY); startY += 30; sb.delete(0, sb.length());} } graphics.drawString(sb.toString(), 0, startY); } else { graphics.drawString(title, 0, startY); } graphics.drawString('現價￥'+reservePrice, 0, startY + 30); startY += 30; graphics.drawString('卷后價￥'+zkFinalPrice, 0, startY + 30); return newImage; }}

兩個幫助類里面有很多方法沒用到，大家只要看幾個關鍵的方法就可以了，TaoBaoQRCode 對象里面的屬性我就沒列出來了，大家自己根據自己的需求而定

以上就是java 實現圖片合成，并添加文字的詳細內容，更多關于Java 圖片合成的資料請關注好吧啦網其它相關文章！