1 import java.awt.AlphaComposite;  2 import java.awt.Color;  3 import java.awt.Font;  4 import java.awt.Graphics;  5 import java.awt.Graphics2D;  6 import java.awt.Image;  7 import java.awt.Toolkit;  8 import java.awt.color.ColorSpace;  9 import java.awt.geom.AffineTransform; 10 import java.awt.image.AffineTransformOp; 11 import java.awt.image.BufferedImage; 12 import java.awt.image.ColorConvertOp; 13 import java.awt.image.CropImageFilter; 14 import java.awt.image.FilteredImageSource; 15 import java.awt.image.ImageFilter; 16 import java.io.File; 17 import java.io.IOException;   18  import javax.imageio.ImageIO;  19  /** 20  * 图片处理工具类：<br> 21  * 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 22  * @author Administrator 23  */ 24 public class ImageUtils {  25      /** 26      * 几种常见的图片格式 27      */ 28     public static String IMAGE_TYPE_GIF = "gif";// 图形交换格式 29     public static String IMAGE_TYPE_JPG = "jpg";// 联合照片专家组 30     public static String IMAGE_TYPE_JPEG = "jpeg";// 联合照片专家组 31     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 32     public static String IMAGE_TYPE_PNG = "png";// 可移植网络图形 33     public static String IMAGE_TYPE_PSD = "psd";// Photoshop的专用格式Photoshop  34      /** 35      * 程序入口：用于测试 36      * @param args 37      */ 38     public static void main(String[] args) { 39         // 1-缩放图像： 40         // 方法一：按比例缩放 41         ImageUtils.scale("e:/abc.jpg", "e:/abc_scale.jpg", 2, true);//测试OK 42         // 方法二：按高度和宽度缩放 43         ImageUtils.scale2("e:/abc.jpg", "e:/abc_scale2.jpg", 500, 300, true);//测试OK  44          // 2-切割图像： 45         // 方法一：按指定起点坐标和宽高切割 46         ImageUtils.cut("e:/abc.jpg", "e:/abc_cut.jpg", 0, 0, 400, 400 );//测试OK 47         // 方法二：指定切片的行数和列数 48         ImageUtils.cut2("e:/abc.jpg", "e:/", 2, 2 );//测试OK 49         // 方法三：指定切片的宽度和高度 50         ImageUtils.cut3("e:/abc.jpg", "e:/", 300, 300 );//测试OK  51          // 3-图像类型转换： 52         ImageUtils.convert("e:/abc.jpg", "GIF", "e:/abc_convert.gif");//测试OK  53          // 4-彩色转黑白： 54         ImageUtils.gray("e:/abc.jpg", "e:/abc_gray.jpg");//测试OK  55          // 5-给图片添加文字水印： 56         // 方法一： 57         ImageUtils.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 58         // 方法二： 59         ImageUtils.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 60  61         // 6-给图片添加图片水印： 62         ImageUtils.pressImage("e:/abc2.jpg", "e:/abc.jpg","e:/abc_pressImage.jpg", 0, 0, 0.5f);//测试OK 63     }  64      /** 65      * 缩放图像（按比例缩放） 66      * @param srcImageFile 源图像文件地址 67      * @param result 缩放后的图像地址 68      * @param scale 缩放比例 69      * @param flag 缩放选择:true 放大; false 缩小; 70      */ 71     public final static void scale(String srcImageFile, String result, 72             int scale, boolean flag) { 73         try { 74             BufferedImage src = http://www.mamicode.com/ImageIO.read(new File(srcImageFile)); // 读入文件 75             int width = src.getWidth(); // 得到源图宽 76             int height = src.getHeight(); // 得到源图长 77             if (flag) {// 放大 78                 width = width * scale; 79                 height = height * scale; 80             } else {// 缩小 81                 width = width / scale; 82                 height = height / scale; 83             } 84             Image image = src.getScaledInstance(width, height, 85                     Image.SCALE_DEFAULT); 86             BufferedImage tag = new BufferedImage(width, height, 87                     BufferedImage.TYPE_INT_RGB); 88             Graphics g = tag.getGraphics(); 89             g.drawImage(image, 0, 0, null); // 绘制缩小后的图 90             g.dispose(); 91             ImageIO.write(tag, "JPEG", new File(result));// 输出到文件流 92         } catch (IOException e) { 93             e.printStackTrace(); 94         } 95     }  96      /** 97      * 缩放图像（按高度和宽度缩放） 98      * @param srcImageFile 源图像文件地址 99      * @param result 缩放后的图像地址100      * @param height 缩放后的高度101      * @param width 缩放后的宽度102      * @param bb 比例不对时是否需要补白：true为补白; false为不补白;103      */104     public final static void scale2(String srcImageFile, String result, int height, int width, boolean bb) {105         try {106             double ratio = 0.0; // 缩放比例107             File f = new File(srcImageFile);108             BufferedImage bi = ImageIO.read(f);109             Image itemp = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH);110             // 计算比例111             if ((bi.getHeight() > height) || (bi.getWidth() > width)) {112                 if (bi.getHeight() > bi.getWidth()) {113                     ratio = (new Integer(height)).doubleValue()114                             / bi.getHeight();115                 } else {116                     ratio = (new Integer(width)).doubleValue() / bi.getWidth();117                 }118                 AffineTransformOp op = new AffineTransformOp(AffineTransform119                         .getScaleInstance(ratio, ratio), null);120                 itemp = op.filter(bi, null);121             }122             if (bb) {//补白123                 BufferedImage image = new BufferedImage(width, height,124                         BufferedImage.TYPE_INT_RGB);125                 Graphics2D g = image.createGraphics();126                 g.setColor(Color.white);127                 g.fillRect(0, 0, width, height);128                 if (width == itemp.getWidth(null))129                     g.drawImage(itemp, 0, (height - itemp.getHeight(null)) / 2,130                             itemp.getWidth(null), itemp.getHeight(null),131                             Color.white, null);132                 else133                     g.drawImage(itemp, (width - itemp.getWidth(null)) / 2, 0,134                             itemp.getWidth(null), itemp.getHeight(null),135                             Color.white, null);136                 g.dispose();137                 itemp = image;138             }139             ImageIO.write((BufferedImage) itemp, "JPEG", new File(result));140         } catch (IOException e) {141             e.printStackTrace();142         }143     }144 145     /**146      * 图像切割(按指定起点坐标和宽高切割)147      * @param srcImageFile 源图像地址148      * @param result 切片后的图像地址149      * @param x 目标切片起点坐标X150      * @param y 目标切片起点坐标Y151      * @param width 目标切片宽度152      * @param height 目标切片高度153      */154     public final static void cut(String srcImageFile, String result,155             int x, int y, int width, int height) {156         try {157             // 读取源图像158             BufferedImage bi = ImageIO.read(new File(srcImageFile));159             int srcWidth = bi.getHeight(); // 源图宽度160             int srcHeight = bi.getWidth(); // 源图高度161             if (srcWidth > 0 && srcHeight > 0) {162                 Image image = bi.getScaledInstance(srcWidth, srcHeight,163                         Image.SCALE_DEFAULT);164                 // 四个参数分别为图像起点坐标和宽高165                 // 即: CropImageFilter(int x,int y,int width,int height)166                 ImageFilter cropFilter = new CropImageFilter(x, y, width, height);167                 Image img = Toolkit.getDefaultToolkit().createImage(168                         new FilteredImageSource(image.getSource(),169                                 cropFilter));170                 BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);171                 Graphics g = tag.getGraphics();172                 g.drawImage(img, 0, 0, width, height, null); // 绘制切割后的图173                 g.dispose();174                 // 输出为文件175                 ImageIO.write(tag, "JPEG", new File(result));176             }177         } catch (Exception e) {178             e.printStackTrace();179         }180     }181 182     /**183      * 图像切割（指定切片的行数和列数）184      * @param srcImageFile 源图像地址185      * @param descDir 切片目标文件夹186      * @param rows 目标切片行数。默认2，必须是范围 [1, 20] 之内187      * @param cols 目标切片列数。默认2，必须是范围 [1, 20] 之内188      */189     public final static void cut2(String srcImageFile, String descDir,190             int rows, int cols) {191         try {192             if(rows<=0||rows>20) rows = 2; // 切片行数193             if(cols<=0||cols>20) cols = 2; // 切片列数194             // 读取源图像195             BufferedImage bi = ImageIO.read(new File(srcImageFile));196             int srcWidth = bi.getHeight(); // 源图宽度197             int srcHeight = bi.getWidth(); // 源图高度198             if (srcWidth > 0 && srcHeight > 0) {199                 Image img;200                 ImageFilter cropFilter;201                 Image image = bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_DEFAULT);202                 int destWidth = srcWidth; // 每张切片的宽度203                 int destHeight = srcHeight; // 每张切片的高度204                 // 计算切片的宽度和高度205                 if (srcWidth % cols == 0) {206                     destWidth = srcWidth / cols;207                 } else {208                     destWidth = (int) Math.floor(srcWidth / cols) + 1;209                 }210                 if (srcHeight % rows == 0) {211                     destHeight = srcHeight / rows;212                 } else {213                     destHeight = (int) Math.floor(srcWidth / rows) + 1;214                 }215                 // 循环建立切片216                 // 改进的想法:是否可用多线程加快切割速度217                 for (int i = 0; i < rows; i++) {218                     for (int j = 0; j < cols; j++) {219                         // 四个参数分别为图像起点坐标和宽高220                         // 即: CropImageFilter(int x,int y,int width,int height)221                         cropFilter = new CropImageFilter(j * destWidth, i * destHeight,222                                 destWidth, destHeight);223                         img = Toolkit.getDefaultToolkit().createImage(224                                 new FilteredImageSource(image.getSource(),225                                         cropFilter));226                         BufferedImage tag = new BufferedImage(destWidth,227                                 destHeight, BufferedImage.TYPE_INT_RGB);228                         Graphics g = tag.getGraphics();229                         g.drawImage(img, 0, 0, null); // 绘制缩小后的图230                         g.dispose();231                         // 输出为文件232                         ImageIO.write(tag, "JPEG", new File(descDir233                                 + "_r" + i + "_c" + j + ".jpg"));234                     }235                 }236             }237         } catch (Exception e) {238             e.printStackTrace();239         }240     } 241      /**242      * 图像切割（指定切片的宽度和高度）243      * @param srcImageFile 源图像地址244      * @param descDir 切片目标文件夹245      * @param destWidth 目标切片宽度。默认200246      * @param destHeight 目标切片高度。默认150247      */248     public final static void cut3(String srcImageFile, String descDir,249             int destWidth, int destHeight) {250         try {251             if(destWidth<=0) destWidth = 200; // 切片宽度252             if(destHeight<=0) destHeight = 150; // 切片高度253             // 读取源图像254             BufferedImage bi = ImageIO.read(new File(srcImageFile));255             int srcWidth = bi.getHeight(); // 源图宽度256             int srcHeight = bi.getWidth(); // 源图高度257             if (srcWidth > destWidth && srcHeight > destHeight) {258                 Image img;259                 ImageFilter cropFilter;260                 Image image = bi.getScaledInstance(srcWidth, srcHeight, Image.SCALE_DEFAULT);261                 int cols = 0; // 切片横向数量262                 int rows = 0; // 切片纵向数量263                 // 计算切片的横向和纵向数量264                 if (srcWidth % destWidth == 0) {265                     cols = srcWidth / destWidth;266                 } else {267                     cols = (int) Math.floor(srcWidth / destWidth) + 1;268                 }269                 if (srcHeight % destHeight == 0) {270                     rows = srcHeight / destHeight;271                 } else {272                     rows = (int) Math.floor(srcHeight / destHeight) + 1;273                 }274                 // 循环建立切片275                 // 改进的想法:是否可用多线程加快切割速度276                 for (int i = 0; i < rows; i++) {277                     for (int j = 0; j < cols; j++) {278                         // 四个参数分别为图像起点坐标和宽高279                         // 即: CropImageFilter(int x,int y,int width,int height)280                         cropFilter = new CropImageFilter(j * destWidth, i * destHeight,281                                 destWidth, destHeight);282                         img = Toolkit.getDefaultToolkit().createImage(283                                 new FilteredImageSource(image.getSource(),284                                         cropFilter));285                         BufferedImage tag = new BufferedImage(destWidth,286                                 destHeight, BufferedImage.TYPE_INT_RGB);287                         Graphics g = tag.getGraphics();288                         g.drawImage(img, 0, 0, null); // 绘制缩小后的图289                         g.dispose();290                         // 输出为文件291                         ImageIO.write(tag, "JPEG", new File(descDir292                                 + "_r" + i + "_c" + j + ".jpg"));293                     }294                 }295             }296         } catch (Exception e) {297             e.printStackTrace();298         }299     } 300      /**301      * 图像类型转换：GIF->JPG、GIF->PNG、PNG->JPG、PNG->GIF(X)、BMP->PNG302      * @param srcImageFile 源图像地址303      * @param formatName 包含格式非正式名称的 String：如JPG、JPEG、GIF等304      * @param destImageFile 目标图像地址305      */306     public final static void convert(String srcImageFile, String formatName, String destImageFile) {307         try {308             File f = new File(srcImageFile);309             f.canRead();310             f.canWrite();311             BufferedImage src =http://www.mamicode.com/ ImageIO.read(f);312             ImageIO.write(src, formatName, new File(destImageFile));313         } catch (Exception e) {314             e.printStackTrace();315         }316     } 317      /**318      * 彩色转为黑白 319      * @param srcImageFile 源图像地址320      * @param destImageFile 目标图像地址321      */322     public final static void gray(String srcImageFile, String destImageFile) {323         try {324             BufferedImage src = http://www.mamicode.com/ImageIO.read(new File(srcImageFile));325             ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);326             ColorConvertOp op = new ColorConvertOp(cs, null);327             src = http://www.mamicode.com/op.filter(src, null);328             ImageIO.write(src, "JPEG", new File(destImageFile));329         } catch (IOException e) {330             e.printStackTrace();331         }332     } 333      /**334      * 给图片添加文字水印335      * @param pressText 水印文字336      * @param srcImageFile 源图像地址337      * @param destImageFile 目标图像地址338      * @param fontName 水印的字体名称339      * @param fontStyle 水印的字体样式340      * @param color 水印的字体颜色341      * @param fontSize 水印的字体大小342      * @param x 修正值343      * @param y 修正值344      * @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345      */346     public final static void pressText(String pressText,347             String srcImageFile, String destImageFile, String fontName,348             int fontStyle, Color color, int fontSize,int x,349             int y, float alpha) {350         try {351             File img = new File(srcImageFile);352             Image src =http://www.mamicode.com/ ImageIO.read(img);353             int width = src.getWidth(null);354             int height = src.getHeight(null);355             BufferedImage image = new BufferedImage(width, height,356                     BufferedImage.TYPE_INT_RGB);357             Graphics2D g = image.createGraphics();358             g.drawImage(src, 0, 0, width, height, null);359             g.setColor(color);360             g.setFont(new Font(fontName, fontStyle, fontSize));361             g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,362                     alpha));363             // 在指定坐标绘制水印文字364             g.drawString(pressText, (width - (getLength(pressText) * fontSize))365                     / 2 + x, (height - fontSize) / 2 + y);366             g.dispose();367             ImageIO.write((BufferedImage) image, "JPEG", new File(destImageFile));// 输出到文件流368         } catch (Exception e) {369             e.printStackTrace();370         }371     } 372      /**373      * 给图片添加文字水印374      * @param pressText 水印文字375      * @param srcImageFile 源图像地址376      * @param destImageFile 目标图像地址377      * @param fontName 字体名称378      * @param fontStyle 字体样式379      * @param color 字体颜色380      * @param fontSize 字体大小381      * @param x 修正值382      * @param y 修正值383      * @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384      */385     public final static void pressText2(String pressText, String srcImageFile,String destImageFile,386             String fontName, int fontStyle, Color color, int fontSize, int x,387             int y, float alpha) {388         try {389             File img = new File(srcImageFile);390             Image src =http://www.mamicode.com/ ImageIO.read(img);391             int width = src.getWidth(null);392             int height = src.getHeight(null);393             BufferedImage image = new BufferedImage(width, height,394                     BufferedImage.TYPE_INT_RGB);395             Graphics2D g = image.createGraphics();396             g.drawImage(src, 0, 0, width, height, null);397             g.setColor(color);398             g.setFont(new Font(fontName, fontStyle, fontSize));399             g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,400                     alpha));401             // 在指定坐标绘制水印文字402             g.drawString(pressText, (width - (getLength(pressText) * fontSize))403                     / 2 + x, (height - fontSize) / 2 + y);404             g.dispose();405             ImageIO.write((BufferedImage) image, "JPEG", new File(destImageFile));406         } catch (Exception e) {407             e.printStackTrace();408         }409     } 410      /**411      * 给图片添加图片水印412      * @param pressImg 水印图片413      * @param srcImageFile 源图像地址414      * @param destImageFile 目标图像地址415      * @param x 修正值。 默认在中间416      * @param y 修正值。 默认在中间417      * @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418      */419     public final static void pressImage(String pressImg, String srcImageFile,String destImageFile,420             int x, int y, float alpha) {421         try {422             File img = new File(srcImageFile);423             Image src =http://www.mamicode.com/ ImageIO.read(img);424             int wideth = src.getWidth(null);425             int height = src.getHeight(null);426             BufferedImage image = new BufferedImage(wideth, height,427                     BufferedImage.TYPE_INT_RGB);428             Graphics2D g = image.createGraphics();429             g.drawImage(src, 0, 0, wideth, height, null);430             // 水印文件431             Image src_biao = ImageIO.read(new File(pressImg));432             int wideth_biao = src_biao.getWidth(null);433             int height_biao = src_biao.getHeight(null);434             g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,435                     alpha));436             g.drawImage(src_biao, (wideth - wideth_biao) / 2,437                     (height - height_biao) / 2, wideth_biao, height_biao, null);438             // 水印文件结束439             g.dispose();440             ImageIO.write((BufferedImage) image,  "JPEG", new File(destImageFile));441         } catch (Exception e) {442             e.printStackTrace();443         }444     } 445      /**446      * 计算text的长度（一个中文算两个字符）447      * @param text448      * @return449      */450     public final static int getLength(String text) {451         int length = 0;452         for (int i = 0; i < text.length(); i++) {453             if (new String(text.charAt(i) + "").getBytes().length > 1) {454                 length += 2;455             } else {456                 length += 1;457             }458         }459         return length / 2;460     }461 }462