Java 圖片加文字水印以及圖片水印 水印位置可選
阿新 • • 發佈：2018-12-08
package com.product.utils; import com.sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGImageEncoder; import org.apache.commons.lang.StringUtils; import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.*; import java.net.URL; import java.net.URLConnection; @SuppressWarnings("restriction") public final class ImageUtil { /** * 給圖片+圖片水印 * * @param url --url 地址 * @param pressImg -- 水印圖片 * @param targetImg -- 目標檔案 * @param location 水印位置：left-top：左上角，right-top：右上角，left-bottom：左下角，right-bottom：右下角 * @param degree 水印旋轉角度 */ public static void pressImage(String url, String pressImg, String targetImg, String location, Integer degree) { try { // 目標檔案 File _file = toFile(url, new File(targetImg)); Image src = ImageIO.read(_file); int width = src.getWidth(null); int height = src.getHeight(null); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.drawImage(src, 0, 0, width, height, null); // 水印檔案 File _filebiao = new File(pressImg); Image src_biao = ImageIO.read(_filebiao); int width_biao = src_biao.getWidth(null); int height_biao = src_biao.getHeight(null); // 水印座標 int x = 0, y = 0; if (StringUtils.equals(location, "left-top")) { x += 30; y += 30; } else if (StringUtils.equals(location, "right-top")) { x = width - width_biao - 30; y += 30; } else if (StringUtils.equals(location, "left-bottom")) { y = height - height_biao - 30; x += 30; } else if (StringUtils.equals(location, "right-bottom")) { x = width - width_biao - 30; y = height - height_biao - 30; } else { x = (width - width_biao) / 2; y = (height - height_biao) / 2; } if (null != degree) { // 設定水印旋轉 g.rotate(Math.toRadians(degree), x, y); } g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); g.drawImage(src_biao, x, y, width_biao, height_biao, null); // 水印檔案結束 g.dispose(); //直接修改原始檔 FileOutputStream out = new FileOutputStream(targetImg); JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(image); out.flush(); out.close(); //生成新的檔案 //File sf = new File("D:/imgout/" + "test" + "." + "jpg"); //ImageIO.write(image, "jpg", sf); // 儲存圖片 } catch (Exception e) { e.printStackTrace(); } } /** * 給圖片加文字水印 * * @param url 圖片的網路地址 * @param pressText s水印文字 * @param targetImg 目標檔案 * @param fontName 字型名稱 * @param fontStyle 字型風格 * @param fontSize 字型大小 * @param location 字型位置:left-top：左上角，right-top：右上角，left-bottom：左下角，right-bottom：右下角 */ public static void pressText(String url, String pressText, String targetImg, String fontName, int fontStyle, int fontSize, String location,Color color) { try { int textWidth = getFontWidth(fontName, fontStyle, fontSize, pressText); //File _file = new File(targetImg); File _file = toFile(url, new File(targetImg)); Image src = ImageIO.read(_file); int width = src.getWidth(null); int height = src.getHeight(null); BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = image.createGraphics(); g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); g.drawImage(src.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null); g.setColor(color); g.setFont(new Font(fontName, fontStyle, fontSize)); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.45f)); int x = 0, y = 0; if (StringUtils.equals(location, "left-top")) { x = 30; y = 30; } else if (StringUtils.equals(location, "right-top")) { x = width - textWidth - 30; y = 30; } else if (StringUtils.equals(location, "left-bottom")) { x += 30; y = height - 30; } else if (StringUtils.equals(location, "right-bottom")) { x = width - textWidth - 30; y = height - 30; } else { x = (width - textWidth) / 2; y = (height) / 2; } g.drawString(pressText, x, y); g.dispose(); FileOutputStream out = new FileOutputStream(targetImg); JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(image); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } } /** * 檔案儲存 * * @param link 圖片連結 * @param file 存入的檔案地址 * @return 下載的檔案 */ public static File toFile(String link, File file) { try { URL url = new URL(link); URLConnection uri = url.openConnection(); //獲取資料流 InputStream ins = uri.getInputStream(); OutputStream os = new FileOutputStream(file); int bytesRead = 0; byte[] buffer = new byte[8192]; while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) { os.write(buffer, 0, bytesRead); } os.close(); ins.close(); return file; } catch (Exception e) { return null; } } /** * 計算文字佔用的width * * @param fontName 字型名稱 * @param fontStyle 字型風格 * @param fontSize 字型大小 * @param pressText 輸入文字 * @return 文字所佔用的寬頻 */ public static int getFontWidth(String fontName, int fontStyle, int fontSize, String pressText) { Font f = new Font(fontName, fontStyle, fontSize); FontMetrics fm = sun.font.FontDesignMetrics.getMetrics(f); // 高度 //System.out.println(fm.getHeight()); // 單個字元寬度 //System.out.println(fm.charWidth('A')); // 整個字串的寬度 //System.out.println(fm.stringWidth(pressText)); return fm.stringWidth(pressText); } public static void main(String[] args) { //pressImage("https://cbu01.alicdn.com/img/ibank/2017/041/711/4771117140_1239574879.jpg", "D:/imgin/20181017110944.png", "D:/imgout/x2.jpg", "left-bottom", null);// //pressImage("D:/imgin/20181017110944.png", "D:/imgout/1.png", "right-top", null); //pressImage("D:/imgin/20181017110944.png", "D:/imgout/1.png", "center", null); //pressImage("D:/imgin/20181017110944.png", "D:/imgout/1.png", "left-bottom", null); //pressImage("D:/imgin/20181017110944.png", "D:/imgout/1.png", "right-bottom", null); //pressText("https://cbu01.alicdn.com/img/ibank/2017/041/711/4771117140_1239574879.jpg", "miraclad傳送到發燒是打發打發esgrocery", "D:/imgout/r1.jpg", "黑體", Font.BOLD + Font.ITALIC, 30, "right-top",Color.GRAY); //getFontWidth("黑體", Font.BOLD + Font.ITALIC, 30, "miraclesgrocery"); //System.out.println(Color.RED); //System.out.println(Color.WHITE); //System.out.println(Color.GRAY); } }