Java为图片加水印的代码

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;  import javax.swing.ImageIcon;    /*******************************************************************************   * Description: 图片水印工具类    * Copyright: Copyright (c) 2011    * Company: Founder    * Project: CMS   *    * @Author taoxg   * @version 1.0   * @See    * HISTORY 2011-9-27 taoxg create   ******************************************************************************/  public class ImageMarkLogoUtil {        // 水印透明度       private static float alpha = 0.5f;      // 水印横向位置      private static int positionWidth = 150;      // 水印纵向位置      private static int positionHeight = 300;      // 水印文字字体      private static Font font = new Font("宋体", Font.BOLD, 30);      // 水印文字颜色      private static Color color = Color.red;      /**       *        * @param alpha        *          水印透明度       * @param positionWidth        *          水印横向位置       * @param positionHeight        *          水印纵向位置       * @param font        *          水印文字字体       * @param color        *          水印文字颜色       */      public static void setImageMarkOptions(float alpha , int positionWidth , int positionHeight ,Font font,Color color){          if(alpha!=0.0f)ImageMarkLogoUtil.alpha = alpha;          if(positionWidth!=0)ImageMarkLogoUtil.positionWidth = positionWidth;          if(positionHeight!=0)ImageMarkLogoUtil.positionHeight = positionHeight;          if(font!=null)ImageMarkLogoUtil.font = font;          if(color!=null)ImageMarkLogoUtil.color = color;      }        /**       * 给图片添加水印图片       *        * @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);      }        /**       * 给图片添加水印图片、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);                // 1、得到画笔对象              Graphics2D g = buffImg.createGraphics();                // 2、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);              // 3、设置水印旋转              if (null != degree) {                  g.rotate(Math.toRadians(degree),(double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);              }                // 4、水印图片的路径 水印图片一般为gif或者png的，这样可设置透明度              ImageIcon imgIcon = new ImageIcon(iconPath);                // 5、得到Image对象。              Image img = imgIcon.getImage();                g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,alpha));                // 6、水印图片的位置              g.drawImage(img, positionWidth, positionHeight, null);              g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));              // 7、释放资源              g.dispose();                // 8、生成图片              os = new FileOutputStream(targerPath);              ImageIO.write(buffImg, "JPG", os);                System.out.println("图片完成添加水印图片");            } catch (Exception e) {              e.printStackTrace();          } finally {              try {                  if (null != os)                      os.close();              } catch (Exception e) {                  e.printStackTrace();              }          }      }        /**       * 给图片添加水印文字       *        * @param logoText        *          水印文字       * @param srcImgPath       *          源图片路径       * @param targerPath       *          目标图片路径       */      public static void markImageByText(String logoText, String srcImgPath,              String targerPath) {          markImageByText(logoText, srcImgPath, targerPath, null);      }        /**       * 给图片添加水印文字、可设置水印文字的旋转角度       *        * @param logoText       * @param srcImgPath       * @param targerPath       * @param degree       */      public static void markImageByText(String logoText, String srcImgPath,              String targerPath, Integer degree) {            InputStream is = null;          OutputStream os = null;          try {              // 1、源图片              Image srcImg = ImageIO.read(new File(srcImgPath));              BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);                // 2、得到画笔对象              Graphics2D g = buffImg.createGraphics();              // 3、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);              // 4、设置水印旋转              if (null != degree) {                  g.rotate(Math.toRadians(degree),(double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);              }              // 5、设置水印文字颜色              g.setColor(color);              // 6、设置水印文字Font              g.setFont(font);              // 7、设置水印文字透明度              g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,alpha));              // 8、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.drawString(logoText, positionWidth, positionHeight);              // 9、释放资源              g.dispose();              // 10、生成图片              os = new FileOutputStream(targerPath);              ImageIO.write(buffImg, "JPG", os);                System.out.println("图片完成添加水印文字");            } 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();              }          }      }        public static void main(String [] args){          String srcImgPath = "d:/qie.jpg";            String logoText = "[ I love Qie]";          String iconPath = "d:/shuimu.jpg";              String targerTextPath = "d:/qie_text.jpg";            String targerTextPath2 = "d:/qie_text_rotate.jpg";            String targerIconPath = "d:/qie_icon.jpg";            String targerIconPath2 = "d:/qie_icon_rotate.jpg";            System.out.println("给图片添加水印文字开始...");          // 给图片添加水印文字            markImageByText(logoText, srcImgPath, targerTextPath);            // 给图片添加水印文字,水印文字旋转-45            markImageByText(logoText, srcImgPath, targerTextPath2, -45);            System.out.println("给图片添加水印文字结束...");            System.out.println("给图片添加水印图片开始...");          setImageMarkOptions(0.3f,1,1,null,null);          // 给图片添加水印图片            markImageByIcon(iconPath, srcImgPath, targerIconPath);            // 给图片添加水印图片,水印图片旋转-45            markImageByIcon(iconPath, srcImgPath, targerIconPath2, -45);           System.out.println("给图片添加水印图片结束...");      }    }
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Java为图片加水印的代码
