Java工具类——实现gif图片缩放与剪切功能
时间 2019-12-05
标签
java
工具
类
实现
gif
图片
缩放
剪切
功能
比较实用, 能够处理gif动态图片
Java图片处理工具类:html
- package com.pinker.util;
- 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;
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- public class ImageUtil2 {
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- 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;
- }
- }
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- public static String getImageFormatName(File file)throws IOException{
- String formatName = null;
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- ImageInputStream iis = ImageIO.createImageInputStream(file);
- Iterator<ImageReader> imageReader = ImageIO.getImageReaders(iis);
- if(imageReader.hasNext()){
- ImageReader reader = imageReader.next();
- formatName = reader.getFormatName();
- }
-
- return formatName;
- }
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- 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();
-
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- String pathPrefix = getPathWithoutSuffix(targetPath);
- targetPath = pathPrefix + formatName;
-
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- 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));
- }
-
- BufferedImage image = ImageIO.read(file);
- image = image.getSubimage(x, y, width, height);
- ImageIO.write(image, formatName, new File(targetPath));
-
- return targetPath;
- }
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- 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;
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- String formatName = getImageFormatName(file);
- if(null == formatName) return targetPath;
- formatName = formatName.toLowerCase();
-
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- String pathPrefix = getPathWithoutSuffix(targetPath);
- targetPath = pathPrefix + formatName;
-
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- 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));
- }
- BufferedImage image = ImageIO.read(file);
- BufferedImage zoomImage = zoom(image , width , height);
- ImageIO.write(zoomImage, formatName, new File(targetPath));
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- return targetPath;
- }
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- 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;
- }
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- 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;
- }
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- 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);
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- 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]);
- }
- }
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- writer.dispose();
- ios.close();
- }
- }
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- public static void cutImage(File sourceFile , File destFile, int x , int y , int width , int height) throws Exception{
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- BufferedImage[] images = readerImage(sourceFile);
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- images = processImage(images, x, y, width, height);
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- String formatName = getImageFormatName(sourceFile);
- destFile = new File(getPathWithoutSuffix(destFile.getPath()) + formatName);
-
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- writerImage(images, formatName , destFile);
- }
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- 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));
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- String[] writerFormatName = ImageIO.getWriterFormatNames();
- String[] writerSuffixName = ImageIO.getWriterFileSuffixes();
- String[] writerMIMEType = ImageIO.getWriterMIMETypes();
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- 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));
- }
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- 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;
- }
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- 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;
- }
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- 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;
- }
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- public static String getPathWithoutSuffix(String src){
- String path = src;
- int index = path.lastIndexOf(".");
- if(index > 0){
- path = path.substring(0, index + 1);
- }
- return path;
- }
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- 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();
- }
-
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- public static void main(String[] args) throws Exception {
-
-
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- try {
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- int x = 100;
- int y = 75;
- int width = 100;
- int height = 100;
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- int clientWidth = 300;
- int clientHeight = 250;
-
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- File file = new File("C:\\1.jpg");
- BufferedImage image = ImageIO.read(file);
- double destWidth = image.getWidth();
- double destHeight = image.getHeight();
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- if(destWidth < width || destHeight < height)
- throw new Exception("源图大小小于截取图片大小!");
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- double widthRatio = destWidth / clientWidth;
- double heightRatio = destHeight / clientHeight;
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- x = Double.valueOf(x * widthRatio).intValue();
- y = Double.valueOf(y * heightRatio).intValue();
- width = Double.valueOf(width * widthRatio).intValue();
- height = Double.valueOf(height * heightRatio).intValue();
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- System.out.println("裁剪大小 x:" + x + ",y:" + y + ",width:" + width + ",height:" + height);
-
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- String formatName = getImageFormatName(file);
- String pathSuffix = "." + formatName;
- String pathPrefix = getFilePrefixPath(file);
- String targetPath = pathPrefix + System.currentTimeMillis() + pathSuffix;
- targetPath = ImageUtil2.cutImage(file.getPath(), targetPath, x , y , width, height);
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- String bigTargetPath = pathPrefix + System.currentTimeMillis() + pathSuffix;
- ImageUtil2.zoom(targetPath, bigTargetPath, 100, 100);
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- String smallTargetPath = pathPrefix + System.currentTimeMillis() + pathSuffix;
- ImageUtil2.zoom(targetPath, smallTargetPath, 50, 50);
-
-
-
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- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- }
转自【http://www.open-open.com/lib/view/open1394859355853.html】