import java.awt.AlphaComposite;

import java.awt.AlphaComposite;  import java.awt.Color;  import java.awt.Font;  import java.awt.Graphics2D;  import java.awt.Image;  import java.awt.geom.AffineTransform;  import java.awt.image.AffineTransformOp;  import java.awt.image.BufferedImage;  import java.io.File;  import java.io.IOException;   import javax.imageio.ImageIO;    public final class ImageUtils {           public final static void pressImage(String pressImg, String targetImg, int x, int y, float alpha) {          try {              File img = new File(targetImg);              Image src = ImageIO.read(img);              int wideth = src.getWidth(null);              int height = src.getHeight(null);              BufferedImage image = new BufferedImage(wideth, height, BufferedImage.TYPE_INT_RGB);              Graphics2D g = image.createGraphics();              g.drawImage(src, 0, 0, wideth, height, null);              //水印文件              Image src_biao = ImageIO.read(new File(pressImg));              int wideth_biao = src_biao.getWidth(null);              int height_biao = src_biao.getHeight(null);              g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));              g.drawImage(src_biao, x, y, wideth_biao, height_biao, null);              //水印文件结束              g.dispose();              ImageIO.write((BufferedImage) image, "jpg", img);          } catch (Exception e) {              e.printStackTrace();          }      }            public static void pressText(String pressText, String targetImg, String fontName, int fontStyle, Color color, int fontSize, int x, int y, float alpha) {          try {              File img = new File(targetImg);              Image src = ImageIO.read(img);              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);              g.setColor(color);              g.setFont(new Font(fontName, fontStyle, fontSize));              g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));              g.drawString(pressText, (width - (getLength(pressText) * fontSize)) / 2 + x, (height - fontSize) / 2 + y);              g.dispose();              ImageIO.write((BufferedImage) image, "jpg", img);          } catch (Exception e) {              e.printStackTrace();          }      }            public static void resize(String filePath, int height, int width, boolean bb) {          try {              double ratio = 0.0; //缩放比例               File f = new File(filePath);              BufferedImage bi = ImageIO.read(f);              Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH);              //计算比例              if ((bi.getHeight() > height) || (bi.getWidth() > width)) {                  if (bi.getHeight() > bi.getWidth()) {                      ratio = (new Integer(height)).doubleValue() / bi.getHeight();                  } else {                      ratio = (new Integer(width)).doubleValue() / bi.getWidth();                  }                  AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(ratio, ratio), null);                  itemp = op.filter(bi, null);              }              if (bb) {                  BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);                  Graphics2D g = image.createGraphics();                  g.setColor(Color.white);                  g.fillRect(0, 0, width, height);                  if (width == itemp.getWidth(null))                      g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2, itemp.getWidth(null), itemp.getHeight(null), Color.white, null);                  else                     g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0, itemp.getWidth(null), itemp.getHeight(null), Color.white, null);                  g.dispose();                  itemp = image;              }              ImageIO.write((BufferedImage) itemp, "jpg", f);          } catch (IOException e) {              e.printStackTrace();          }      }       public static void main(String[] args) throws IOException {          pressImage("G://imgtest//sy.jpg", "G://imgtest//test1.jpg", 0, 0, 0.5f);          pressText("我是文字水印", "G://imgtest//test1.jpg", "黑体", 36, Color.white, 80, 0, 0, 0.3f);          resize("G://imgtest//test1.jpg", 500, 500, true);      }       public static int getLength(String text) {          int length = 0;          for (int i = 0; i < text.length(); i++) {              if (new String(text.charAt(i) + "").getBytes().length > 1) {                  length += 2;              } else {                  length += 1;              }          }          return length / 2;      }  }