java 图片压缩 剪切 水印 转换 黑白 缩放

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.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import java.io.InputStream;   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 朱志杰  */ public class ImageUtil {     /**      * 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           /**      * 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 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 byte[] scale2(InputStream srcImageFile, int height, int width, boolean bb) {         try {             double ratio = 0.0; // 缩放比例             BufferedImage bi = ImageIO.read(srcImageFile);             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);                 else                     g.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));             ByteArrayOutputStream out = new ByteArrayOutputStream();             ImageIO.write((BufferedImage) itemp, "jpg", out);             return out.toByteArray();         } catch (IOException e) {             e.printStackTrace();             return null;         }     }           /**      * 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);                 else                     g.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;     }       //    /** //     * 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 //        ImageUtil.scale("e:/abc.jpg", "e:/abc_scale.jpg", 2, true);//测试OK //        // 方法二：按高度和宽度缩放 //        ImageUtil.scale2("e:/abc.jpg", "e:/abc_scale2.jpg", 500, 300, true);//测试OK //        // 2-切割图像： //        // 方法一：按指定起点坐标和宽高切割 //        ImageUtil.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 //        ImageUtil.cut2("e:/abc.jpg", "e:/", 2, 2 );//测试OK //        // 方法三：指定切片的宽度和高度 //        ImageUtil.cut3("e:/abc.jpg", "e:/", 300, 300 );//测试OK //        // 3-图像类型转换： //        ImageUtil.convert("e:/abc.jpg", "GIF", "e:/abc_convert.gif");//测试OK //        // 4-彩色转黑白： //        ImageUtil.gray("e:/abc.jpg", "e:/abc_gray.jpg");//测试OK //        // 5-给图片添加文字水印： //        // 方法一： //        ImageUtil.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： //        ImageUtil.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： //        ImageUtil.pressImage("e:/abc2.jpg", "e:/abc.jpg","e:/abc_pressImage.jpg", 0, 0, 0.5f);//测试OK //    } }