使用Jmagick压缩高质量图片
jar包地址? http://downloads.jmagick.org/6.3.9/?????
?
我在window下使用的是 ?? jmagick-win-6.3.9-Q8.zip 和? ImageMagick-6.3.9-0-Q8-windows-dll.exe
? ? ? linux下使用的是 ? ? ? ? JMagick-6.2.6-0.tar.gz ?? 和 ImageMagick-x86_64-pc-linux-gnu.tar.gz ????????????
?
?
doc地址?? http://downloads.jmagick.org/jmagick-doc/
?
windows
一 .? 安装 ImageMagick-6.3.9-0-Q8-windows-dll.exe
?
二 .? 将 安装目录下 “C:\Program Files\ImageMagick-6.3.9-Q8\ ”(按自己所安装的目录找) 下的所有dll文件 copy 到系统盘下的 “C:\WINDOWS\system32\”文件夹里
?
三 .? 配置环境变量
???? 再环境变量path里添加新的值 “C:\Program Files\ImageMagick-6.3.9-Q8”
?
四 .? 解压jmagick-win-6.3.9-Q8.zip?
?????? 将 jmagick.dll 复制到系统盘下的 “C:\WINDOWS\system32\”文件夹里 和 复制到jdk的bin(例“E:\Java\jdk1.5.0_10\bin”)文件里各一份?
????? 将 jmagick.jar 复制到Tomcat下的lib文件夹里 和 所使用项目的WEB-INF下lib文件里 各一份
?
linux
? 朋友配的 得自己去网上找资料 :(
?
?
?
?
操作范例
package com.utils;import java.awt.Dimension;import java.awt.Rectangle;import java.text.SimpleDateFormat;import java.util.Date;import magick.CompositeOperator;import magick.CompressionType;import magick.DrawInfo;import magick.ImageInfo;import magick.MagickException;import magick.MagickImage;import magick.PixelPacket;import magick.PreviewType;public class Aa {static{//不能漏掉这个，不然jmagick.jar的路径找不到System.setProperty("jmagick.systemclassloader","no");}/** * 压缩图片 * @param filePath 源文件路径 * @param toPath 缩略图路径 */public static void createThumbnail(String filePath, String toPath) throws MagickException{ImageInfo info = null;MagickImage image = null;Dimension imageDim = null;MagickImage scaled = null;try{info = new ImageInfo(filePath);image = new MagickImage(info);imageDim = image.getDimension();int wideth = imageDim.width;int height = imageDim.height;if (wideth > height) {height = 660 * height / wideth;wideth = 660;} scaled = image.scaleImage(wideth, height);//小图片文件的大小.scaled.setFileName(toPath);scaled.writeImage(info);}finally{if(scaled != null){scaled.destroyImages();}} }/** * 水印(图片logo) * @param filePath 源文件路径 * @param toImg 修改图路径 * @param logoPath logo图路径 * @throws MagickException */public static void initLogoImg(String filePath, String toImg, String logoPath) throws MagickException {ImageInfo info = new ImageInfo();MagickImage fImage = null;MagickImage sImage = null;MagickImage fLogo = null;MagickImage sLogo = null;Dimension imageDim = null;Dimension logoDim = null;try {fImage = new MagickImage(new ImageInfo(filePath));imageDim = fImage.getDimension();int width = imageDim.width;int height = imageDim.height;if (width > 660) {height = 660 * height / width;width = 660;}sImage = fImage.scaleImage(width, height);fLogo = new MagickImage(new ImageInfo(logoPath));logoDim = fLogo.getDimension();int lw = width / 8;int lh = logoDim.height * lw / logoDim.width;sLogo = fLogo.scaleImage(lw, lh);sImage.compositeImage(CompositeOperator.AtopCompositeOp, sLogo, width-(lw + lh/10), height-(lh + lh/10));sImage.setFileName(toImg);sImage.writeImage(info);} finally {if(sImage != null){sImage.destroyImages();}}}/** * 水印(文字) ?* @param filePath 源文件路径 * @param toImg 修改图路径 * @param text 名字(文字内容自己随意) * @throws MagickException */public static void initTextToImg(String filePath, String toImg, String text) throws MagickException{ImageInfo info = new ImageInfo(filePath);if (filePath.toUpperCase().endsWith("JPG") || filePath.toUpperCase().endsWith("JPEG")) {info.setCompression(CompressionType.JPEGCompression); //压缩类别为JPEG格式info.setPreviewType(PreviewType.JPEGPreview); //预览格式为JPEG格式info.setQuality(95);}MagickImage aImage = new MagickImage(info);Dimension imageDim = aImage.getDimension();int wideth = imageDim.width;int height = imageDim.height;if (wideth > 660) {height = 660 * height / wideth;wideth = 660;}int a = 0;int b = 0;String[] as = text.split("");for (String string : as) {if(string.matches("[\u4E00-\u9FA5]")){a++;}if(string.matches("[a-zA-Z0-9]")){b++;}}int tl = a*12 + b*6 + 300;MagickImage scaled = aImage.scaleImage(wideth, height);if(wideth > tl && height > 5){DrawInfo aInfo = new DrawInfo(info);aInfo.setFill(PixelPacket.queryColorDatabase("white"));aInfo.setUnderColor(new PixelPacket(0,0,0,100));aInfo.setPointsize(12);//解决中文乱码问题,自己可以去随意定义个自己喜欢字体，我在这用的微软雅黑String fontPath = "C:/WINDOWS/Fonts/MSYH.TTF";//String fontPath = "/usr/maindata/MSYH.TTF";aInfo.setFont(fontPath);aInfo.setTextAntialias(true);aInfo.setOpacity(0);aInfo.setText(" " + text + "于 " + new SimpleDateFormat("yyyy-MM-dd").format(new Date()) + " 上传于XXXX网，版权归作者所有！");aInfo.setGeometry("+" + (wideth-tl) + "+" + (height-5));scaled.annotateImage(aInfo);}scaled.setFileName(toImg);scaled.writeImage(info);scaled.destroyImages();}/** * 切图 * @param imgPath 源图路径 * @param toPath 修改图路径 * @param w * @param h * @param x * @param y * @throws MagickException */public static void cutImg(String imgPath, String toPath, int w, int h, int x, int y) throws MagickException {ImageInfo infoS = null;MagickImage image = null;MagickImage cropped = null;Rectangle rect = null;try {infoS = new ImageInfo(imgPath);image = new MagickImage(infoS);rect = new Rectangle(x, y, w, h);cropped = image.cropImage(rect);cropped.setFileName(toPath);cropped.writeImage(infoS);} finally {if (cropped != null) {cropped.destroyImages();}}}}??
?