import java.awt.Color;  import java.awt.Graphics2D;  import java.awt.Image;  import java.awt.image.BufferedImage;  import java.awt.image.ConvolveOp;  import java.awt.image.Kernel;  import java.io.File;  import java.io.FileOutputStream;  import java.io.InputStream;     import org.apache.commons.fileupload.FileItem;  import org.apache.log4j.Logger;     import com.sun.image.codec.jpeg.JPEGCodec;  import com.sun.image.codec.jpeg.JPEGImageEncoder;     public class ImageUtil {      /**       * Logger for this class       */      private static final Logger logger = Logger.getLogger(ImageUtil.class);         public void imageScale(String srcFilePath, String targetFilePath,              int width, int height) {          this.imageScale(new File(srcFilePath), new File(targetFilePath), width,                  height);      }         public void imageScale(File srcFile, File targetFile, int width, int height) {          try {              Image image = javax.imageio.ImageIO.read(srcFile);                 image = image.getScaledInstance(width, height,                      Image.SCALE_AREA_AVERAGING);              // Make a BufferedImage from the Image.              BufferedImage mBufferedImage = new BufferedImage(width, height,                      BufferedImage.TYPE_INT_RGB);              Graphics2D g2 = mBufferedImage.createGraphics();                             g2.drawImage(image, 0, 0, width, height, Color.white, null);              g2.dispose();                 float[] kernelData2 = { -0.125f, -0.125f, -0.125f, -0.125f, 2,                      -0.125f, -0.125f, -0.125f, -0.125f };              Kernel kernel = new Kernel(3, 3, kernelData2);              ConvolveOp cOp = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);              mBufferedImage = cOp.filter(mBufferedImage, null);                 File targetDir = targetFile.getParentFile();              if (!targetDir.exists())                  targetDir.mkdirs();                 FileOutputStream out = new FileOutputStream(targetFile);              JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);              encoder.encode(mBufferedImage);              out.close();          } catch (Exception e) {              logger.error(                      "imageScale(String, String, int, int) - 图片压缩出错 - srcFilePath="                              + srcFile.getPath() + ", targeFilePath="                              + targetFile.getPath() + ", width=" + width                              + ", height=" + height, e);          }      }         public void imageScale(FileItem fileItem, String targetFilePath, int width,              int height) {          try {              InputStream input = fileItem.getInputStream();              Image image = javax.imageio.ImageIO.read(input);                 image = image.getScaledInstance(width, height,                      Image.SCALE_AREA_AVERAGING);              BufferedImage mBufferedImage = new BufferedImage(width, height,                      BufferedImage.TYPE_INT_RGB);              Graphics2D g2 = mBufferedImage.createGraphics();                 g2.drawImage(image, 0, 0, width, height, Color.white, null);              g2.dispose();                 float[] kernelData2 = { -0.125f, -0.125f, -0.125f, -0.125f, 2,                      -0.125f, -0.125f, -0.125f, -0.125f };              Kernel kernel = new Kernel(3, 3, kernelData2);              ConvolveOp cOp = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);              mBufferedImage = cOp.filter(mBufferedImage, null);                 File target = new File(targetFilePath);              File targetDir = target.getParentFile();              if (!targetDir.exists())                  targetDir.mkdirs();                 FileOutputStream out = new FileOutputStream(targetFilePath);              JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);              encoder.encode(mBufferedImage);              out.close();              input.close();          } catch (Exception e) {              logger.error(                      "imageScale(String, String, int, int) - 图片压缩出错 - fileItem="                              + fileItem.getName() + ", targetFilePath="                              + targetFilePath + ", width=" + width + ", height="                              + height, e);          }      }             public static void main(String[] args) {          ImageUtil iu=new ImageUtil();          iu.imageScale("c:/uploadFiles/191540095661.jpg", "c:/uploadFiles/t.jpg", 270, 220);      }  }