图片添加水印

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【java中给图片添加文字水印】

package biz;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.InputStream; import java.io.OutputStream;  import javax.imageio.ImageIO;  public class ImageMarkLogoByText {      /**     * @param args     */     public static void main(String[] args) {         String srcImgPath = "e:/test/myblog_01.jpg";         String logoText = "yanzi";         String targerPath = "e:/test/img_mark_text.jpg";          String targerPath2 = "e:/test/img_mark_text_rotate.jpg";          // 给图片添加水印         ImageMarkLogoByText.markByText(logoText, srcImgPath, targerPath);          // 给图片添加水印,水印旋转-45         ImageMarkLogoByText.markByText(logoText, srcImgPath, targerPath2, -45);     }      /**     * 给图片添加水印     * @param logoText     * @param srcImgPath     * @param targerPath     */     public static void markByText(String logoText, String srcImgPath,             String targerPath) {         markByText(logoText, srcImgPath, targerPath, null);     }      /**     * 给图片添加水印、可设置水印的旋转角度     * @param logoText     * @param srcImgPath     * @param targerPath     * @param degree     */     public static void markByText(String logoText, String srcImgPath,             String targerPath, Integer degree) {         // 主图片的路径         InputStream is = null;         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);             }              // 设置颜色             g.setColor(Color.red);              // 设置 Font             g.setFont(new Font("宋体", Font.BOLD, 30));              float alpha = 0.5f;             g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,                     alpha));              // 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) .             int height = (int)(srcImg.getHeight(null)*0.95);            int width = (int)(srcImg.getWidth(null)*0.05);            g.drawString(logoText, width, height);              g.dispose();              os = new FileOutputStream(targerPath);              // 生成图片             ImageIO.write(buffImg, "JPG", os);                     } catch (Exception e) {             e.printStackTrace();         } finally {             try {                 if (null != is)                     is.close();             } catch (Exception e) {                 e.printStackTrace();             }             try {                 if (null != os)                     os.close();             } catch (Exception e) {                 e.printStackTrace();             }         }     } }

【图片水印】

package biz;import java.awt.AlphaComposite; import java.awt.Graphics2D; import java.awt.Image; import java.awt.RenderingHints; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream;  import javax.imageio.ImageIO; import javax.swing.ImageIcon;  import com.sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGImageDecoder; import com.sun.image.codec.jpeg.JPEGImageEncoder;  /** * 图片水印 */ public class ImageMarkLogoByIcon {      /**     * @param args     */     public static void main(String[] args) {         String srcImgPath = "e:/test/myblog_01.jpg";         String iconPath = "e:/test/blog_logo.jpg";         String targerPath = "e:/test/img_mark_icon.jpg";         String targerPath2 = "e:/test/img_mark_icon_rotate.jpg";         // 给图片添加水印         ImageMarkLogoByIcon.markImageByIcon(iconPath, srcImgPath, targerPath);         // 给图片添加水印,水印旋转-45         ImageMarkLogoByIcon.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             int height = (int)(srcImg.getHeight(null)-imgIcon.getIconHeight()-1);            g.drawImage(img, 1, height, null);              g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));              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();             }         }     } }