first commit

comm/Kernel/src/util/ImageCut.java

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+package util;
+
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.Toolkit;
+import java.awt.color.ColorSpace;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorConvertOp;
+import java.awt.image.CropImageFilter;
+import java.awt.image.FilteredImageSource;
+import java.awt.image.ImageFilter;
+import java.io.File;
+import java.io.IOException;
+
+import javax.imageio.ImageIO;
+
+public class ImageCut {
+
+	/**
+	 * 
+	 * 缩放图像
+	 * 
+	 * @param srcImageFile源图像文件地址
+	 * 
+	 * @param result缩放后的图像地址
+	 * 
+	 * @param scale缩放比例
+	 * 
+	 * @param flag缩放选择
+	 *            :true 放大; false 缩小;
+	 */
+
+	public static void scale(String srcImageFile, String result, String type,double scale,
+
+	boolean flag) {
+
+		try {
+
+			BufferedImage src = ImageIO.read(new File(srcImageFile)); // 读入文件
+
+			int width = src.getWidth(); // 得到源图宽
+
+			int height = src.getHeight(); // 得到源图长
+
+			if (flag) {// 放大
+
+				width = Double.valueOf((width * scale)).intValue();
+
+				height = Double.valueOf((height * scale)).intValue();
+
+			} else {// 缩小
+
+				width = Double.valueOf((width / scale)).intValue();
+
+				height = Double.valueOf((height / scale)).intValue();
+
+			}
+
+			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); // 绘制缩小后的图
+
+			g.dispose();
+
+			ImageIO.write(tag, type, new File(result));// 输出到文件流
+
+		} catch (IOException e) {
+
+			e.printStackTrace();
+
+		}
+
+	}
+
+	/**
+	 * 
+	 * 图像切割
+	 * 
+	 * @param srcImageFile源图像地址
+	 * 
+	 * @param descDir切片目标文件夹
+	 * 
+	 * @param destWidth目标切片宽度
+	 * 
+	 * @param destHeight目标切片高度
+	 */
+
+	public static void cut(String srcImageFile, String descDir, int destWidth,
+
+	int destHeight) {
+
+		try {
+
+			Image img;
+
+			ImageFilter cropFilter; // 读取源图像
+
+			BufferedImage bi = ImageIO.read(new File(srcImageFile));
+
+			int srcWidth = bi.getHeight(); // 源图宽度
+
+			int srcHeight = bi.getWidth(); // 源图高度
+
+			if (srcWidth > destWidth && srcHeight > destHeight) {
+
+				Image image = bi.getScaledInstance(srcWidth, srcHeight,
+
+				Image.SCALE_DEFAULT);
+
+				destWidth = 200; // 切片宽度
+
+				destHeight = 150; // 切片高度
+
+				int cols = 0; // 切片横向数量
+
+				int rows = 0; // 切片纵向数量
+
+				// 计算切片的横向和纵向数量
+
+				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;
+
+				}
+
+				// 循环建立切片
+
+				// 改进的想法:是否可用多线程加快切割速度
+
+				for (int i = 0; i < rows; i++) {
+
+					for (int j = 0; j < cols; j++) {
+
+						// 四个参数分别为图像起点坐标和宽高
+
+						// 即: CropImageFilter(int x,int y,int width,int height)
+
+						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); // 绘制缩小后的图
+
+						g.dispose();
+
+						// 输出为文件
+
+						ImageIO.write(tag, "JPEG", new File(descDir
+
+						+ "pre_map_" + i + "_" + j + ".jpg"));
+
+					}
+
+				}
+
+			}
+
+		} catch (Exception e) {
+
+			e.printStackTrace();
+
+		}
+
+	}
+
+	// 图像类型转换GIF->JPG GIF->PNG PNG->JPG PNG->GIF(X)
+
+	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();
+
+		}
+
+	}
+
+	// 彩色转为黑白
+
+	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();
+
+		}
+
+	}
+
+	public static void main(String[] args) {
+		double s = 1024;
+		int e = 500;
+		double scale = s/e;
+         String src = "E:\\apache-tomcat-6.0.37\\wtpwebapps\\mcp0917\\upload\\images\\2c9287a341ca74320141ca76181e0001\\5453797376338493.jpg";
+		 scale(src,"E:\\apache-tomcat-6.0.37\\wtpwebapps\\mcp0917\\upload\\images\\2c9287a341ca74320141ca76181e0001\\5453797376338493.jpg","jpg",scale,false);
+
+	}
+
+}