import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.Toolkit;import java.awt.color.ColorSpace;import java.awt.geom.AffineTransform;import java.awt.image.AffineTransformOp;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;/** * 图片处理工具类：<br> * 功能：缩放图像、切割图像、图像类型转换、彩色转黑白、文字水印、图片水印等 * * @author alexgaoyh */public class ImagesUtil {/** * 几种常见的图片格式 */public static String IMAGE_TYPE_GIF = "gif";// 图形交换格式public static String IMAGE_TYPE_JPG = "jpg";// 联合照片专家组public static String IMAGE_TYPE_JPEG = "jpeg";// 联合照片专家组public static String IMAGE_TYPE_BMP = "bmp";// 英文Bitmap（位图）的简写，它是Windows操作系统中的标准图像文件格式public static String IMAGE_TYPE_PNG = "png";// 可移植网络图形public static String IMAGE_TYPE_PSD = "psd";// Photoshop的专用格式Photoshop/** * 程序入口：用于测试 * * @param args */public static void main(String[] args) {// 1-缩放图像：// 方法一：按比例缩放ImagesUtil.scale("f:/2.gif", "f:/_scale.jpg", 11, false);// 测试OK// 方法二：按高度和宽度缩放//ImagesUtil.scale2("f:/2.gif", "f:/abc_scale2.jpg", 236, 50, true);// 测试OK// 2-切割图像：// 方法一：按指定起点坐标和宽高切割//ImagesUtil.cut("e:/abc.jpg", "e:/abc_cut.jpg", 0, 0, 400, 400);// 测试OK// 方法二：指定切片的行数和列数//ImagesUtil.cut2("e:/abc.jpg", "e:/", 2, 2);// 测试OK// 方法三：指定切片的宽度和高度//ImagesUtil.cut3("e:/abc.jpg", "e:/", 300, 300);// 测试OK// 3-图像类型转换：//ImagesUtil.convert("e:/abc.jpg", "GIF", "e:/abc_convert.gif");// 测试OK// 4-彩色转黑白：//ImagesUtil.gray("e:/abc.jpg", "e:/abc_gray.jpg");// 测试OK// 5-给图片添加文字水印：// 方法一：//ImagesUtil.pressText("我是水印文字", "e:/abc.jpg", "e:/abc_pressText.jpg", "宋体", Font.BOLD, Color.white, 80, 0, 0, 0.5f);// 测试OK// 方法二：//ImagesUtil.pressText2("我也是水印文字", "e:/abc.jpg", "e:/abc_pressText2.jpg", "黑体", 36, Color.white, 80, 0, 0, 0.5f);// 测试OK// 6-给图片添加图片水印：ImagesUtil.pressImage("e:/abc2.jpg", "e:/abc.jpg","e:/abc_pressImage.jpg", 0, 0, 0.5f);// 测试OK}/** * 缩放图像（按比例缩放） * * @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 final static void scale(String srcImageFile, String result,int 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 = width * scale;height = height * scale;} else {// 缩小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); // 绘制缩小后的图g.dispose();ImageIO.write(tag, "JPEG", new File(result));// 输出到文件流} catch (IOException e) {e.printStackTrace();}}/** * 缩放图像（按高度和宽度缩放） * * @param srcImageFile * 源图像文件地址 * @param result * 缩放后的图像地址 * @param height * 缩放后的高度 * @param width * 缩放后的宽度 * @param bb * 比例不对时是否需要补白：true为补白; false为不补白; */public final static void scale2(String srcImageFile, String result,int height, int width, boolean bb) {try {double ratio = 0.0; // 缩放比例File f = new File(srcImageFile);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) {// 补白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);elseg.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, "JPEG", new File(result));} catch (IOException e) {e.printStackTrace();}}/** * 图像切割(按指定起点坐标和宽高切割) * * @param srcImageFile * 源图像地址 * @param result * 切片后的图像地址 * @param x * 目标切片起点坐标X * @param y * 目标切片起点坐标Y * @param width * 目标切片宽度 * @param height * 目标切片高度 */public final static void cut(String srcImageFile, String result, int x,int y, int width, int height) {try {// 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 > 0 && srcHeight > 0) {Image image = bi.getScaledInstance(srcWidth, srcHeight,Image.SCALE_DEFAULT);// 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)ImageFilter cropFilter = new CropImageFilter(x, y, width,height);Image img = Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(image.getSource(), cropFilter));BufferedImage tag = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);Graphics g = tag.getGraphics();g.drawImage(img, 0, 0, width, height, null); // 绘制切割后的图g.dispose();// 输出为文件ImageIO.write(tag, "JPEG", new File(result));}} catch (Exception e) {e.printStackTrace();}}/** * 图像切割（指定切片的行数和列数） * * @param srcImageFile * 源图像地址 * @param descDir * 切片目标文件夹 * @param rows * 目标切片行数。默认2，必须是范围 [1, 20] 之内 * @param cols * 目标切片列数。默认2，必须是范围 [1, 20] 之内 */public final static void cut2(String srcImageFile, String descDir,int rows, int cols) {try {if (rows <= 0 || rows > 20)rows = 2; // 切片行数if (cols <= 0 || cols > 20)cols = 2; // 切片列数// 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 > 0 && srcHeight > 0) {Image img;ImageFilter cropFilter;Image image = bi.getScaledInstance(srcWidth, srcHeight,Image.SCALE_DEFAULT);int destWidth = srcWidth; // 每张切片的宽度int destHeight = srcHeight; // 每张切片的高度// 计算切片的宽度和高度if (srcWidth % cols == 0) {destWidth = srcWidth / cols;} else {destWidth = (int) Math.floor(srcWidth / cols) + 1;}if (srcHeight % rows == 0) {destHeight = srcHeight / rows;} else {destHeight = (int) Math.floor(srcWidth / rows) + 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 * destWidth, i* destHeight, 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 + "_r" + i+ "_c" + j + ".jpg"));}}}} catch (Exception e) {e.printStackTrace();}}/** * 图像切割（指定切片的宽度和高度） * * @param srcImageFile * 源图像地址 * @param descDir * 切片目标文件夹 * @param destWidth * 目标切片宽度。默认200 * @param destHeight * 目标切片高度。默认150 */public final static void cut3(String srcImageFile, String descDir,int destWidth, int destHeight) {try {if (destWidth <= 0)destWidth = 200; // 切片宽度if (destHeight <= 0)destHeight = 150; // 切片高度// 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 img;ImageFilter cropFilter;Image image = bi.getScaledInstance(srcWidth, srcHeight,Image.SCALE_DEFAULT);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 * destWidth, i* destHeight, 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 + "_r" + i+ "_c" + j + ".jpg"));}}}} catch (Exception e) {e.printStackTrace();}}/** * 图像类型转换：GIF->JPG、GIF->PNG、PNG->JPG、PNG->GIF(X)、BMP->PNG * * @param srcImageFile * 源图像地址 * @param formatName * 包含格式非正式名称的 String：如JPG、JPEG、GIF等 * @param destImageFile * 目标图像地址 */public final static void convert(String srcImageFile, String formatName,String destImageFile) {try {File f = new File(srcImageFile);f.canRead();f.canWrite();BufferedImage src = ImageIO.read(f);ImageIO.write(src, formatName, new File(destImageFile));} catch (Exception e) {e.printStackTrace();}}/** * 彩色转为黑白 * * @param srcImageFile * 源图像地址 * @param destImageFile * 目标图像地址 */public final static void gray(String srcImageFile, String destImageFile) {try {BufferedImage src = ImageIO.read(new File(srcImageFile));ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);ColorConvertOp op = new ColorConvertOp(cs, null);src = op.filter(src, null);ImageIO.write(src, "JPEG", new File(destImageFile));} catch (IOException e) {e.printStackTrace();}}/** * 给图片添加文字水印 * * @param pressText * 水印文字 * @param srcImageFile * 源图像地址 * @param destImageFile * 目标图像地址 * @param fontName * 水印的字体名称 * @param fontStyle * 水印的字体样式 * @param color * 水印的字体颜色 * @param fontSize * 水印的字体大小 * @param x * 修正值 * @param y * 修正值 * @param alpha * 透明度：alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字 */public final static void pressText(String pressText, String srcImageFile,String destImageFile, String fontName, int fontStyle, Color color,int fontSize, int x, int y, float alpha) {try {File img = new File(srcImageFile);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));// 在指定坐标绘制水印文字g.drawString(pressText, (width - (getLength(pressText) * fontSize))/ 2 + x, (height - fontSize) / 2 + y);g.dispose();ImageIO.write((BufferedImage) image, "JPEG",new File(destImageFile));// 输出到文件流} catch (Exception e) {e.printStackTrace();}}/** * 给图片添加文字水印 * * @param pressText * 水印文字 * @param srcImageFile * 源图像地址 * @param destImageFile * 目标图像地址 * @param fontName * 字体名称 * @param fontStyle * 字体样式 * @param color * 字体颜色 * @param fontSize * 字体大小 * @param x * 修正值 * @param y * 修正值 * @param alpha * 透明度：alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字 */public final static void pressText2(String pressText, String srcImageFile,String destImageFile, String fontName, int fontStyle, Color color,int fontSize, int x, int y, float alpha) {try {File img = new File(srcImageFile);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));// 在指定坐标绘制水印文字g.drawString(pressText, (width - (getLength(pressText) * fontSize))/ 2 + x, (height - fontSize) / 2 + y);g.dispose();ImageIO.write((BufferedImage) image, "JPEG",new File(destImageFile));} catch (Exception e) {e.printStackTrace();}}/** * 给图片添加图片水印 * * @param pressImg * 水印图片 * @param srcImageFile * 源图像地址 * @param destImageFile * 目标图像地址 * @param x * 修正值。 默认在中间 * @param y * 修正值。 默认在中间 * @param alpha * 透明度：alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字 */public final static void pressImage(String pressImg, String srcImageFile,String destImageFile, int x, int y, float alpha) {try {File img = new File(srcImageFile);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, (wideth - wideth_biao) / 2,(height - height_biao) / 2, wideth_biao, height_biao, null);// 水印文件结束g.dispose();ImageIO.write((BufferedImage) image, "JPEG",new File(destImageFile));} catch (Exception e) {e.printStackTrace();}}/** * 计算text的长度（一个中文算两个字符） * * @param text * @return */public final 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;}}
