效果图:
import java.awt.AlphaComposite; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.Image; import java.awt.RenderingHints; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileOutputStream; import java.io.OutputStream; import javax.imageio.ImageIO; import javax.swing.ImageIcon; /** * 图片水印 * * @blog * @author */ public class ShuiYinImage { public static void main(String[] args) { //markImageByIcon方面里-- 加了测试文字水印 String srcImgPath = "C:/feifei/srcImage.jpg"; //源图片路径 String iconPath = "C:/feifei/shuiyinImage.gif"; //水印图片路径 String targerPath = "C:/feifei/srcImage_shuiyin.jpg"; //输出 String targerPath2 = "C:/feifei/srcImage_shuiyin_rotate.jpg";//输出2 // 给图片添加水印 ShuiYinImage.markImageByIcon(iconPath, srcImgPath, targerPath); // 给图片添加水印,水印旋转-45 ShuiYinImage.markImageByIcon(iconPath, srcImgPath, targerPath2, -45); } /** * 给图片添加水印 * * @param iconPath * 水印图片路径 * @param srcImgPath * 源图片路径 * @param targerPath * 目标图片路径 */ public static void markImageByIcon(String iconPath, String srcImgPath, String targerPath) { markImageByIcon(iconPath, srcImgPath, targerPath, null); } /** * 给图片添加水印、可设置水印图片旋转角度 * * @param iconPath * 水印图片路径 * @param srcImgPath * 源图片路径 * @param targerPath * 目标图片路径 * @param degree * 水印图片旋转角度 */ public static void markImageByIcon(String iconPath, String srcImgPath, String targerPath, Integer degree) { OutputStream os = null; try { Image srcImg = ImageIO.read(new File(srcImgPath)); BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB); // 得到画笔对象 // Graphics g= buffImg.getGraphics(); Graphics2D g = buffImg.createGraphics(); // 设置对线段的锯齿状边缘处理 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null); if (null != degree) { // 设置水印旋转 g.rotate(Math.toRadians(degree), (double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2); } // 水印图象的路径 水印一般为gif或者png的,这样可设置透明度 ImageIcon imgIcon = new ImageIcon(iconPath); // 得到Image对象。 Image img = imgIcon.getImage(); float alpha = 0.5f; // 透明度 g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha)); // 表示水印图片的位置 g.drawImage(img, 150, 300, null); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); //测试文字水印 ----------- 第一参数->设置的内容,后面两个参数->文字在图片上的坐标位置(x,y) g.setFont(new Font("宋体", Font.BOLD, 30)); g.setColor(Color.red); g.drawString("http://blog.csdn.net/xxb2008/", 100, 300); g.dispose(); os = new FileOutputStream(targerPath); // 生成图片 ImageIO.write(buffImg, "JPG", os); System.out.println("图片完成添加Icon印章。。。。。。"); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != os) os.close(); } catch (Exception e) { e.printStackTrace(); } } } }
参考出自:http://sjsky.iteye.com/blog/1154390