图像处理Java工具类，java工具类,缩放图像、切割图像、图像

图像处理Java工具类，java工具类,缩放图像、切割图像、图像

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```javaimport 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.RenderingHints;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.awt.image.ImagingOpException;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;

import javax.imageio.ImageIO;

/ * author:lldy * time:2012-5-6下午6:37:18 * 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 */public class ImageUtils { / * 相对于图片的位置 / private static final int POSITION_UPPERLEFT=0; private static final int POSITION_UPPERRIGHT=10; private static final int POSITION_LOWERLEFT=1; private static final int POSITION_LOWERRIGHT=11; / * 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

private static ImageUtils instance;private ImageUtils() {    instance = this;}/** * 获取实例 * @return */public static ImageUtils getInstance() {    if (instance == null) {        instance = new ImageUtils();    }    return instance;}public  BufferedImage image2BufferedImage(Image image){    System.out.println(image.getWidth(null));    System.out.println(image.getHeight(null));    BufferedImage bufferedImage = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB);    Graphics2D g = bufferedImage.createGraphics();    g.drawImage(image, null, null);    g.dispose();    System.out.println(bufferedImage.getWidth());    System.out.println(bufferedImage.getHeight());    return bufferedImage;}/** * 缩放并转换格式后保存 * @param srcPath源路径 * @param destPath目标路径 * @param width：目标宽 * @param height：目标高 * @param format：文件格式 * @return */public static boolean scaleToFile(String srcPath, String destPath, int width,  int height,String format) {    boolean flag = false;    try {        File file = new File(srcPath);        File destFile = new File(destPath);        if (!destFile.getParentFile().exists()) {            destFile.getParentFile().mkdir();        }        BufferedImage src = ImageIO.read(file); // 读入文件        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();        flag = ImageIO.write(tag, format, new FileOutputStream(destFile));// 输出到文件流    } catch (IOException e) {        e.printStackTrace();    }    return flag;}/** * 缩放Image，此方法返回源图像按百分比缩放后的图像 * @param inputImage * @param percentage 百分比 允许的输入0<percentage<10000 * @return */public static BufferedImage scaleByPercentage(BufferedImage inputImage,int percentage){    //允许百分比    if(0>percentage||percentage>10000){        throw new ImagingOpException("Error::不合法的参数:percentage->"+percentage+",percentage应该大于0~小于10000");    }          //获取原始图像透明度类型    int type = inputImage.getColorModel().getTransparency();    //获取目标图像大小    int w=inputImage.getWidth()*percentage;    int h=inputImage.getHeight()*percentage;     //开启抗锯齿    RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,            RenderingHints.VALUE_ANTIALIAS_ON);    //使用高质量压缩    renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);    BufferedImage img = new BufferedImage(w, h, type);    Graphics2D graphics2d =img.createGraphics();    graphics2d.setRenderingHints(renderingHints);            graphics2d.drawImage(inputImage, 0, 0, w, h, 0, 0, inputImage            .getWidth(), inputImage.getHeight(), null);    graphics2d.dispose();    return img;    /*此代码将返回Image类型    return inputImage.getScaledInstance(inputImage.getWidth()*percentage,            inputImage.getHeight()*percentage, Image.SCALE_SMOOTH);    */}/** * 缩放Image，此方法返回源图像按给定最大宽度限制下按比例缩放后的图像 * @param inputImage * @param maxWidth：压缩后允许的最大宽度 * @param maxHeight：压缩后允许的最大高度 * @throws java.io.IOException * return  */public static BufferedImage scaleByPixelRate(BufferedImage inputImage, int maxWidth, int maxHeight) throws Exception {    //获取原始图像透明度类型    int type = inputImage.getColorModel().getTransparency();    int width = inputImage.getWidth();    int height = inputImage.getHeight();    int newWidth = maxWidth;    int newHeight =maxHeight;    //如果指定最大宽度超过比例    if(width*maxHeight<height*maxWidth){        newWidth=(int)(newHeight*width/height) ;    }    //如果指定最大高度超过比例    if(width*maxHeight>height*maxWidth){        newHeight=(int)(newWidth*height/width);    }    //开启抗锯齿    RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,            RenderingHints.VALUE_ANTIALIAS_ON);    //使用高质量压缩    renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);    BufferedImage img = new BufferedImage(newWidth, newHeight, type);    Graphics2D graphics2d =img.createGraphics();    graphics2d.setRenderingHints(renderingHints);            graphics2d.drawImage(inputImage, 0, 0, newWidth, newHeight, 0, 0, width, height, null);    graphics2d.dispose();    return img;}/** * 缩放Image，此方法返回源图像按给定宽度、高度限制下缩放后的图像 * @param inputImage * @param maxWidth：压缩后宽度 * @param maxHeight：压缩后高度 * @throws java.io.IOException * return  */public static BufferedImage scaleByPixel(BufferedImage inputImage, int newWidth, int newHeight) throws Exception {    //获取原始图像透明度类型    int type = inputImage.getColorModel().getTransparency();    int width = inputImage.getWidth();    int height = inputImage.getHeight();    //开启抗锯齿    RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_ANTIALIASING,            RenderingHints.VALUE_ANTIALIAS_ON);    //使用高质量压缩    renderingHints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);    BufferedImage img = new BufferedImage(newWidth, newHeight, type);    Graphics2D graphics2d =img.createGraphics();    graphics2d.setRenderingHints(renderingHints);            graphics2d.drawImage(inputImage, 0, 0, newWidth, newHeight, 0, 0, width, height, null);    graphics2d.dispose();    return img;}/** * 切割图像，返回指定范围的图像 * @param inputImage * @param x 起点横坐标 * @param y 起点纵坐标 * @param width 切割图片宽度:如果宽度超出图片，将改为图片自x剩余宽度 * @param height 切割图片高度：如果高度超出图片，将改为图片自y剩余高度 * @param fill 指定目标图像大小超出时是否补白，如果true，则表示补白；false表示不补白，此时将重置目标图像大小 * @return */public static BufferedImage cut(BufferedImage inputImage,int x,int y,int width,int height,boolean fill){    //获取原始图像透明度类型    int type = inputImage.getColorModel().getTransparency();    int w = inputImage.getWidth();    int h = inputImage.getHeight();    int endx=x+width;    int endy=y+height;    if(x>w)        throw new ImagingOpException("起点横坐标超出源图像范围");    if(y>h)        throw new ImagingOpException("起点纵坐标超出源图像范围");    BufferedImage img;    //补白    if(fill){        img = new BufferedImage(width, height, type);        //宽度超出限制        if((w-x)<width){            width=w-x;            endx=w;        }        //高度超出限制        if((h-y)<height){            height=h-y;            endy=h;        }    //不补    }else{        //宽度超出限制        if((w-x)<width){            width=w-x;            endx=w;        }        //高度超出限制        if((h-y)<height){            height=h-y;            endy=h;        }        img = new BufferedImage(width, height, type);     }    //开启抗锯齿    RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,            RenderingHints.VALUE_ANTIALIAS_ON);    //使用高质量压缩    renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);    Graphics2D graphics2d =img.createGraphics();    graphics2d.setRenderingHints(renderingHints);            graphics2d.drawImage(inputImage, 0, 0, width, height, x, y, endx, endy, null);    graphics2d.dispose();    return img;}/** * 切割图像，返回指定起点位置指定大小图像 * @param inputImage * @param startPoint 起点位置：左上：0、右上:10、左下:1、右下:11 * @param width 切割图片宽度 * @param height 切割图片高度 * @param fill 指定目标图像大小超出时是否补白，如果true，则表示补白；false表示不补白，此时将重置目标图像大小 * @return */public static BufferedImage cut(BufferedImage inputImage,int startPoint,int width,int height,boolean fill){    //获取原始图像透明度类型    int type = inputImage.getColorModel().getTransparency();    int w = inputImage.getWidth();    int h = inputImage.getHeight();    BufferedImage img;    //补白    if(fill){        img = new BufferedImage(width, height, type);        if(width>w)            width=w;        if(height>h)            height=h;    //不补    }else{        if(width>w)            width=w;        if(height>h)            height=h;        img = new BufferedImage(width, height, type);    }    //开启抗锯齿    RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,            RenderingHints.VALUE_ANTIALIAS_ON);    //使用高质量压缩    renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);           Graphics2D graphics2d =img.createGraphics();    graphics2d.setRenderingHints(renderingHints);     switch(startPoint){            //右上        case POSITION_UPPERRIGHT:            graphics2d.drawImage(inputImage, w-width, 0, w, height, 0, 0, width, height, null);            break;            //左下        case POSITION_LOWERLEFT:            graphics2d.drawImage(inputImage, 0, h-height, width, h, 0, 0, width, height, null);               break;            //右下        case POSITION_LOWERRIGHT:            graphics2d.drawImage(inputImage, w-width, h-height, w, h, 0, 0, width, height, null);             break;            //默认左上        case POSITION_UPPERLEFT:        default:             graphics2d.drawImage(inputImage, 0, 0, width, height, 0, 0, width, height, null);    }    graphics2d.dispose();    return img;}/** * 以指定角度旋转图片：使用正角度 theta 进行旋转，可将正 x 轴上的点转向正 y 轴。  * @param inputImage * @param degree 角度:以度数为单位 * @return */public static BufferedImage rotateImage(final BufferedImage inputImage,        final int degree) {    int w = inputImage.getWidth();    int h = inputImage.getHeight();    int type = inputImage.getColorModel().getTransparency();    BufferedImage img=new BufferedImage(w, h, type);    Graphics2D graphics2d =img.createGraphics();    //开启抗锯齿    RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,            RenderingHints.VALUE_ANTIALIAS_ON);    //使用高质量压缩    renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);    graphics2d.setRenderingHints(renderingHints);    graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2);    graphics2d.drawImage(inputImage, 0, 0, null);    graphics2d.dispose();    return img;}/** * 水平翻转图像 *  * @param bufferedimage 目标图像 * @return */public static BufferedImage flipHorizontalImage(final BufferedImage inputImage) {    int w = inputImage.getWidth();    int h = inputImage.getHeight();    BufferedImage img;    Graphics2D graphics2d;    (graphics2d = (img = new BufferedImage(w, h, inputImage            .getColorModel().getTransparency())).createGraphics())            .drawImage(inputImage, 0, 0, w, h, w, 0, 0, h, null);    graphics2d.dispose();    return img;}/** * 竖直翻转图像 *  * @param bufferedimage 目标图像 * @return */public static BufferedImage flipVerticalImage(final BufferedImage inputImage) {    int w = inputImage.getWidth();    int h = inputImage.getHeight();    BufferedImage img;    Graphics2D graphics2d;    (graphics2d = (img = new BufferedImage(w, h, inputImage            .getColorModel().getTransparency())).createGraphics())            .drawImage(inputImage, 0, 0, w, h, 0, h, w, 0, null);    graphics2d.dispose();    return img;}/** * 图片水印 *  * @param inputImage *            待处理图像 * @param markImage *            水印图像 * @param x *            水印位于图片左上角的 x 坐标值 * @param y *            水印位于图片左上角的 y 坐标值 * @param alpha *            水印透明度 0.1f ~ 1.0f * */public static BufferedImage waterMark(BufferedImage inputImage,BufferedImage markImage, int x, int y,                float alpha) {        BufferedImage image = new BufferedImage(inputImage.getWidth(), inputImage                        .getHeight(), BufferedImage.TYPE_INT_ARGB);        Graphics2D g = image.createGraphics();        g.drawImage(inputImage, 0, 0, null);        // 加载水印图像        g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,                        alpha));        g.drawImage(markImage, x, y, null);        g.dispose();        return image;}/** * 文字水印 *  * @param inputImage *            待处理图像 * @param text *            水印文字 * @param font *            水印字体信息 * @param color *            水印字体颜色 * @param x *            水印位于图片左上角的 x 坐标值 * @param y *            水印位于图片左上角的 y 坐标值 * @param alpha *            水印透明度 0.1f ~ 1.0f */public static BufferedImage textMark(BufferedImage inputImage, String text, Font font,                Color color, int x, int y, float alpha) {        Font dfont = (font == null) ? new Font("宋体", 20, 13) : font;        BufferedImage image = new BufferedImage(inputImage.getWidth(), inputImage                        .getHeight(), BufferedImage.TYPE_INT_ARGB);        Graphics2D g = image.createGraphics();        g.drawImage(inputImage, 0, 0, null);        g.setColor(color);        g.setFont(dfont);        g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,                        alpha));        g.drawString(text, x, y);        g.dispose();        return image;}/** * 图像彩色转黑白色 * @param inputImage * @return 转换后的BufferedImage */public final static BufferedImage toGray(BufferedImage inputImage){        ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);        //对源 BufferedImage 进行颜色转换。如果目标图像为 null，        //则根据适当的 ColorModel 创建 BufferedImage。         ColorConvertOp op = new ColorConvertOp(cs, null);        return op.filter(inputImage, null);}/** * 图像彩色转为黑白 * @param srcImageFile *            源图像地址 * @param destImageFile *            目标图像地址 * @param formatType *              目标图像格式：如果formatType为null;将默认转换为PNG */public final static void toGray(String srcImageFile, String destImageFile,String formatType){    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);        //如果formatType为null;将默认转换为PNG        if(formatType==null){            formatType="PNG";        }        ImageIO.write(src,formatType,new File(destImageFile));    } catch (IOException e)    {        e.printStackTrace();    }}/** * 图像类型转换：GIF->JPG、GIF->PNG、PNG->JPG、PNG->GIF(X)、BMP->PNG *  * @param inputImage *            源图像地址 * @param formatType *            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(BufferedImage inputImage, String formatType,String destImageFile){    try    {        ImageIO.write(inputImage, formatType, new File(destImageFile));    } 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 destDir *            切片目标文件夹 * @param formatType *              目标格式 * @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 cut(BufferedImage inputImage, String destDir,        String formatType,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 w = inputImage.getHeight(); // 源图宽度        int h = inputImage.getWidth(); // 源图高度        if (w > 0 &amp;&amp; h > 0)        {            Image img;            ImageFilter cropFilter;            Image image = inputImage.getScaledInstance(w, h,                    Image.SCALE_DEFAULT);            int destWidth = w; // 每张切片的宽度            int destHeight = h; // 每张切片的高度            // 计算切片的宽度和高度            if (w % cols == 0)            {                destWidth = w / cols;            } else            {                destWidth = (int) Math.floor(w / cols) + 1;            }            if (h % rows == 0)            {                destHeight = h / rows;            } else            {                destHeight = (int) Math.floor(h / 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_ARGB);                    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, formatType, new File(destDir + "_r" + i                            + "_c" + j + "."+formatType.toLowerCase()));                }            }        }    } 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 *            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 * @param formatType *              目标格式 */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,String formatType){    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_ARGB);        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, formatType,                new File(destImageFile));// 输出到文件流    } 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 * @param formatType *              目标格式 */ public final static void pressImage(String pressImg, String srcImageFile,        String destImageFile, int x, int y, float alpha,String formatType){    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_ARGB);        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, formatType,                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;}

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