package com.jrails.commons.image; import java.io.*; import java.awt.*; import java.awt.image.*; import java.awt.Graphics; import java.awt.color.ColorSpace; import javax.imageio.ImageIO; public class ChangeImageSize{ public static void scale(String srcImageFile, String result, int scale, boolean flag) { try { BufferedImage src = ImageIO.read(new File(srcImageFile)); int width = src.getWidth(); int height = src.getHeight(); if (flag) { width = width * scale; height = height * scale; } else { width = width / scale; height = height / scale; } Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT); BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(image, 0, 0, null); g.dispose(); ImageIO.write(tag, "JPEG", new File(result)); } catch (IOException e) { e.printStackTrace(); } } public static void cut(String srcImageFile, String descDir, int destWidth, int destHeight) { try { Image img; ImageFilter cropFilter; BufferedImage bi = ImageIO.read(new File(srcImageFile)); int srcWidth = bi.getHeight(); int srcHeight = bi.getWidth(); if (srcWidth > destWidth && srcHeight > destHeight) { Image image = bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_DEFAULT); destWidth = 200; destHeight = 150; int cols = 0; int rows = 0; if (srcWidth % destWidth == 0) { cols = srcWidth / destWidth; } else { cols = (int) Math.floor(srcWidth / destWidth) + 1; } if (srcHeight % destHeight == 0) { rows = srcHeight / destHeight; } else { rows = (int) Math.floor(srcHeight / destHeight) + 1; } for (int i = 0; i < rows; i++) { for (int j = 0; j < cols; j++) { cropFilter = new CropImageFilter(j * 200, i * 150, destWidth, destHeight); img = Toolkit.getDefaultToolkit().createImage( new FilteredImageSource(image.getSource(), cropFilter)); BufferedImage tag = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(img, 0, 0, null); g.dispose(); ImageIO.write(tag, "JPEG", new File(descDir + "pre_map_" + i + "_" + j + ".jpg")); } } } } catch (Exception e) { e.printStackTrace(); } } public static void convert(String source, String result) { try { File f = new File(source); f.canRead(); f.canWrite(); BufferedImage src = ImageIO.read(f); ImageIO.write(src, "JPG", new File(result)); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static void gray(String source, String result) { try { BufferedImage src = ImageIO.read(new File(source)); ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY); ColorConvertOp op = new ColorConvertOp(cs, null); src = op.filter(src, null); ImageIO.write(src, "JPEG", new File(result)); } catch (IOException e) { e.printStackTrace(); } } /** *//** * @param args */ public static void main(String[] args) { scale("c:\\java\\1.jpg","C:\\java\\image.jpg",10,false); } }