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【支持动画片GIF图像裁剪】Java实现图像裁剪以及压缩处理工具包

2012-07-16 
【支持动画GIF图像裁剪】Java实现图像裁剪以及压缩处理工具包import java.awt.Colorimport java.awt.Graphi

【支持动画GIF图像裁剪】Java实现图像裁剪以及压缩处理工具包

import java.awt.Color;import java.awt.Graphics;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.util.Arrays;import java.util.Iterator;import javax.imageio.IIOImage;import javax.imageio.ImageIO;import javax.imageio.ImageReader;import javax.imageio.ImageWriter;import javax.imageio.stream.ImageInputStream;import javax.imageio.stream.ImageOutputStream;/** * 图像裁剪以及压缩处理工具类 * * 主要针对动态的GIF格式图片裁剪之后,只出现一帧动态效果的现象提供解决方案 * * 提供依赖三方包解决方案(针对GIF格式数据特征一一解析,进行编码解码操作) * 提供基于JDK Image I/O 的解决方案(JDK探索失败) * * * @author Andy * @see       GifDecoder.class * @see       AnimatedGifEncoder.class * @see       BufferedImage.class * @see    ImageIO.class * @see       ImageReader.class * @since 1.0 2011.12.21 */public class ImageCutterUtil {    public enum IMAGE_FORMAT{        BMP("bmp"),        JPG("jpg"),        WBMP("wbmp"),        JPEG("jpeg"),        PNG("png"),        GIF("gif");                private String value;        IMAGE_FORMAT(String value){            this.value = value;        }        public String getValue() {            return value;        }        public void setValue(String value) {            this.value = value;        }    }            /**     * 获取图片格式     * @param file   图片文件     * @return    图片格式     */    public static String getImageFormatName(File file)throws IOException{        String formatName = null;                ImageInputStream iis = ImageIO.createImageInputStream(file);        Iterator<ImageReader> imageReader =  ImageIO.getImageReaders(iis);        if(imageReader.hasNext()){            ImageReader reader = imageReader.next();            formatName = reader.getFormatName();        }        return formatName;    }        /*************************  基于三方包解决方案    *****************************/    /**     * 剪切图片     *     * @param source        待剪切图片路径     * @param targetPath    裁剪后保存路径(默认为源路径)     * @param x                起始横坐标     * @param y                起始纵坐标     * @param width            剪切宽度     * @param height        剪切高度              *     * @returns                   裁剪后保存路径(图片后缀根据图片本身类型生成)         * @throws IOException     */    public static String cutImage(String sourcePath , String targetPath , int x , int y , int width , int height) throws IOException{        File file = new File(sourcePath);        if(!file.exists()) {            throw new IOException("not found the image:" + sourcePath);        }        if(null == targetPath || targetPath.isEmpty()) targetPath = sourcePath;                String formatName = getImageFormatName(file);        if(null == formatName) return targetPath;        formatName = formatName.toLowerCase();                // 防止图片后缀与图片本身类型不一致的情况        String pathPrefix = getPathWithoutSuffix(targetPath);        targetPath = pathPrefix + formatName;                // GIF需要特殊处理        if(IMAGE_FORMAT.GIF.getValue() == formatName){            GifDecoder decoder = new GifDecoder();              int status = decoder.read(sourcePath);              if (status != GifDecoder.STATUS_OK) {                  throw new IOException("read image " + sourcePath + " error!");              }            AnimatedGifEncoder encoder = new AnimatedGifEncoder();            encoder.start(targetPath);            encoder.setRepeat(decoder.getLoopCount());              for (int i = 0; i < decoder.getFrameCount(); i ++) {                  encoder.setDelay(decoder.getDelay(i));                  BufferedImage childImage = decoder.getFrame(i);                BufferedImage image = childImage.getSubimage(x, y, width, height);                encoder.addFrame(image);              }              encoder.finish();        }else{            BufferedImage image = ImageIO.read(file);            image = image.getSubimage(x, y, width, height);            ImageIO.write(image, formatName, new File(targetPath));        }                return targetPath;    }        /**     * 压缩图片     * @param sourcePath       待压缩的图片路径     * @param targetPath    压缩后图片路径(默认为初始路径)     * @param width            压缩宽度     * @param height        压缩高度     *     * @returns                   裁剪后保存路径(图片后缀根据图片本身类型生成)         * @throws IOException     */    public static String zoom(String sourcePath , String targetPath, int width , int height) throws IOException{        File file = new File(sourcePath);        if(!file.exists()) {            throw new IOException("not found the image :" + sourcePath);        }        if(null == targetPath || targetPath.isEmpty()) targetPath = sourcePath;                String formatName = getImageFormatName(file);        if(null == formatName) return targetPath;        formatName = formatName.toLowerCase();                // 防止图片后缀与图片本身类型不一致的情况        String pathPrefix = getPathWithoutSuffix(targetPath);        targetPath = pathPrefix + formatName;                // GIF需要特殊处理        if(IMAGE_FORMAT.GIF.getValue() == formatName){            GifDecoder decoder = new GifDecoder();              int status = decoder.read(sourcePath);              if (status != GifDecoder.STATUS_OK) {                  throw new IOException("read image " + sourcePath + " error!");              }            AnimatedGifEncoder encoder = new AnimatedGifEncoder();            encoder.start(targetPath);            encoder.setRepeat(decoder.getLoopCount());              for (int i = 0; i < decoder.getFrameCount(); i ++) {                  encoder.setDelay(decoder.getDelay(i));                  BufferedImage image = zoom(decoder.getFrame(i), width , height);                encoder.addFrame(image);              }              encoder.finish();        }else{            BufferedImage image = ImageIO.read(file);            BufferedImage zoomImage = zoom(image , width , height);            ImageIO.write(zoomImage, formatName, new File(targetPath));        }                return targetPath;    }        /*********************** 基于JDK 解决方案     ********************************/        /**     * 读取图片     * @param file 图片文件     * @return     图片数据     * @throws IOException     */    public static BufferedImage[] readerImage(File file) throws IOException{        BufferedImage sourceImage = ImageIO.read(file);        BufferedImage[] images = null;        ImageInputStream iis = ImageIO.createImageInputStream(file);        Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(iis);        if(imageReaders.hasNext()){            ImageReader reader = imageReaders.next();            reader.setInput(iis);            int imageNumber = reader.getNumImages(true);            images = new BufferedImage[imageNumber];            for (int i = 0; i < imageNumber; i++) {                BufferedImage image = reader.read(i);                if(sourceImage.getWidth() > image.getWidth() || sourceImage.getHeight() > image.getHeight()){                    image = zoom(image, sourceImage.getWidth(), sourceImage.getHeight());                }                images[i] = image;            }            reader.dispose();            iis.close();        }        return images;    }        /**     * 根据要求处理图片     *     * @param images    图片数组     * @param x            横向起始位置     * @param y         纵向起始位置     * @param width      宽度         * @param height    宽度     * @return            处理后的图片数组     * @throws Exception     */    public static BufferedImage[] processImage(BufferedImage[] images , int x , int y , int width , int height) throws Exception{        if(null == images){            return images;        }        BufferedImage[] oldImages = images;        images = new BufferedImage[images.length];        for (int i = 0; i < oldImages.length; i++) {            BufferedImage image = oldImages[i];            images[i] = image.getSubimage(x, y, width, height);        }        return images;    }        /**     * 写入处理后的图片到file     *     * 图片后缀根据图片格式生成     *     * @param images        处理后的图片数据     * @param formatName     图片格式     * @param file            写入文件对象     * @throws Exception     */    public static void writerImage(BufferedImage[] images ,  String formatName , File file) throws Exception{        Iterator<ImageWriter> imageWriters = ImageIO.getImageWritersByFormatName(formatName);        if(imageWriters.hasNext()){            ImageWriter writer = imageWriters.next();            String fileName = file.getName();            int index = fileName.lastIndexOf(".");            if(index > 0){                fileName = fileName.substring(0, index + 1) + formatName;            }            String pathPrefix = getFilePrefixPath(file.getPath());            File outFile = new File(pathPrefix + fileName);            ImageOutputStream ios = ImageIO.createImageOutputStream(outFile);            writer.setOutput(ios);                        if(writer.canWriteSequence()){                writer.prepareWriteSequence(null);                for (int i = 0; i < images.length; i++) {                    BufferedImage childImage = images[i];                    IIOImage image = new IIOImage(childImage, null , null);                    writer.writeToSequence(image, null);                }                writer.endWriteSequence();            }else{                for (int i = 0; i < images.length; i++) {                    writer.write(images[i]);                }            }                        writer.dispose();            ios.close();        }    }        /**     * 剪切格式图片     *     * 基于JDK Image I/O解决方案     *     * @param sourceFile        待剪切图片文件对象     * @param destFile                  裁剪后保存文件对象     * @param x                    剪切横向起始位置     * @param y                 剪切纵向起始位置     * @param width              剪切宽度         * @param height            剪切宽度     * @throws Exception     */    public static void cutImage(File sourceFile , File destFile, int x , int y , int width , int height) throws Exception{        // 读取图片信息        BufferedImage[] images = readerImage(sourceFile);        // 处理图片        images = processImage(images, x, y, width, height);        // 获取文件后缀        String formatName = getImageFormatName(sourceFile);        destFile = new File(getPathWithoutSuffix(destFile.getPath()) + formatName);        // 写入处理后的图片到文件        writerImage(images, formatName , destFile);    }                /**     * 获取系统支持的图片格式     */    public static void getOSSupportsStandardImageFormat(){        String[] readerFormatName = ImageIO.getReaderFormatNames();        String[] readerSuffixName = ImageIO.getReaderFileSuffixes();        String[] readerMIMEType = ImageIO.getReaderMIMETypes();        System.out.println("========================= OS supports reader ========================");        System.out.println("OS supports reader format name :  " + Arrays.asList(readerFormatName));        System.out.println("OS supports reader suffix name :  " + Arrays.asList(readerSuffixName));        System.out.println("OS supports reader MIME type :  " + Arrays.asList(readerMIMEType));                String[] writerFormatName = ImageIO.getWriterFormatNames();        String[] writerSuffixName = ImageIO.getWriterFileSuffixes();        String[] writerMIMEType = ImageIO.getWriterMIMETypes();                System.out.println("========================= OS supports writer ========================");        System.out.println("OS supports writer format name :  " + Arrays.asList(writerFormatName));        System.out.println("OS supports writer suffix name :  " + Arrays.asList(writerSuffixName));        System.out.println("OS supports writer MIME type :  " + Arrays.asList(writerMIMEType));    }        /**     * 压缩图片     * @param sourceImage    待压缩图片     * @param width             压缩图片高度     * @param heigt            压缩图片宽度     */    private static BufferedImage zoom(BufferedImage sourceImage , int width , int height){        BufferedImage zoomImage = new BufferedImage(width, height, sourceImage.getType());        Image image = sourceImage.getScaledInstance(width, height, Image.SCALE_SMOOTH);        Graphics gc = zoomImage.getGraphics();        gc.setColor(Color.WHITE);        gc.drawImage( image , 0, 0, null);        return zoomImage;    }        /**     * 获取某个文件的前缀路径     *     * 不包含文件名的路径     *     * @param file   当前文件对象     * @return     * @throws IOException     */    public static String getFilePrefixPath(File file) throws IOException{        String path = null;        if(!file.exists()) {            throw new IOException("not found the file !" );        }        String fileName = file.getName();        path = file.getPath().replace(fileName, "");        return path;    }        /**     * 获取某个文件的前缀路径     *     * 不包含文件名的路径     *     * @param path   当前文件路径     * @return         不包含文件名的路径     * @throws Exception     */    public static String getFilePrefixPath(String path) throws Exception{        if(null == path || path.isEmpty()) throw new Exception("文件路径为空!");        int index = path.lastIndexOf(File.separator);        if(index > 0){            path = path.substring(0, index + 1);        }        return path;    }        /**     * 获取不包含后缀的文件路径     *     * @param src     * @return     */    public static String getPathWithoutSuffix(String src){        String path = src;        int index = path.lastIndexOf(".");        if(index > 0){            path = path.substring(0, index + 1);        }        return path;    }        /**     * 获取文件名     * @param filePath        文件路径     * @return                文件名     * @throws IOException     */    public static String getFileName(String filePath) throws IOException{        File file = new File(filePath);        if(!file.exists()) {            throw new IOException("not found the file !" );        }        return file.getName();    }        /**     * @param args     * @throws Exception     */    public static void main(String[] args) throws Exception {        // 获取系统支持的图片格式        //ImageCutterUtil.getOSSupportsStandardImageFormat();                try {            // 起始坐标,剪切大小            int x = 100;            int y = 75;            int width = 100;            int height = 100;            // 参考图像大小            int clientWidth = 300;            int clientHeight = 250;                                    File file = new File("D:\\PCM Project\\upload\\tmp\\1.gif");            BufferedImage image = ImageIO.read(file);            double destWidth = image.getWidth();            double destHeight = image.getHeight();                        if(destWidth < width || destHeight < height)                throw new Exception("源图大小小于截取图片大小!");                        double widthRatio = destWidth / clientWidth;            double heightRatio = destHeight / clientHeight;                        x = Double.valueOf(x * widthRatio).intValue();            y = Double.valueOf(y * heightRatio).intValue();            width = Double.valueOf(width * widthRatio).intValue();            height = Double.valueOf(height * heightRatio).intValue();                        System.out.println("裁剪大小  x:" + x + ",y:" + y + ",width:" + width + ",height:" + height);            /************************ 基于三方包解决方案 *************************/            String formatName = getImageFormatName(file);            String pathSuffix = "." + formatName;            String pathPrefix = getFilePrefixPath(file);            String targetPath = pathPrefix  + System.currentTimeMillis() + pathSuffix;            targetPath = ImageCutterUtil.cutImage(file.getPath(), targetPath, x , y , width, height);                        String bigTargetPath = pathPrefix  + System.currentTimeMillis() + pathSuffix;            ImageCutterUtil.zoom(targetPath, bigTargetPath, 100, 100);                        String smallTargetPath = pathPrefix  + System.currentTimeMillis() + pathSuffix;            ImageCutterUtil.zoom(targetPath, smallTargetPath, 50, 50);                        /************************ 基于JDK Image I/O 解决方案(JDK探索失败) *************************///            File destFile = new File(targetPath);//            ImageCutterUtil.cutImage(file, destFile, x, y, width, height);        } catch (IOException e) {            e.printStackTrace();        }    }}

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