基于HTML5转换PDF的电子书阅读插件
html5部分
项目一般都是以pdf.js插件阅读PDF文件，但存在阅读体验不理想的情况，所以参考手机上的电子书阅读器，使用国外的链接描述http://fliphtml5.com
制作电子书示例。
完整代码已上传git，标题搜索即可。
插件功能强大，缩略图，鼠标翻页，放大缩小都可以，部分配置代码config.js如下
var bookConfig = { appName:'flippdf', totalPageCount : 0, largePageWidth : 1080, largePageHeight : 1440, normalPath : "files/page/", largePath : "files/large/", thumbPath : "files/thumb/", ToolBarsSettings:"", TitleBar:"", appLogoLinkURL:"", bookTitle:"FLIPBUILDER", bookDescription:"", ButtonsBar:"", ShareButton:"", ThumbnailsButton:"", ThumbnailsButtonVisible:"Hide", ZoomButton:"", ZoomButtonVisible:"No", FlashDisplaySettings:"", MainBgConfig:"", bgBeginColor:"#cccccc", bgEndColor:"#eeeeee", bgMRotation:45, pageBackgroundColor:"#FFFFFF", flipshortcutbutton:"Hide", BookMargins:"", topMargin:10, bottomMargin:10, leftMargin:10, rightMargin:10, HTMLControlSettings:"", linkconfig:"", LinkDownColor:"#808080", LinkAlpha:0.5, OpenWindow:"_Blank", BookMarkButtonVisible:'False', productName : 'Demo created by Flip PDF', homePage : 'http://www.html5.com/', isFlipPdf : "False", TableOfContentButtonVisible:"False", searchTextJS:'javascript/search_config.js', searchPositionJS:undefined};java部分
maven引入
<dependency> <groupId>org.apache.pdfbox</groupId> <artifactId>fontbox</artifactId> <version>2.0.9</version> </dependency> <dependency> <groupId>org.apache.pdfbox</groupId> <artifactId>pdfbox</artifactId> <version>2.0.9</version> </dependency>核心程序
import java.awt.Graphics2D;import java.awt.RenderingHints;import java.awt.geom.AffineTransform;import java.awt.image.BufferedImage;import java.awt.image.ColorModel;import java.awt.image.WritableRaster;import java.io.File;import java.io.IOException;import javax.imageio.ImageIO;import org.apache.pdfbox.pdmodel.PDDocument;import org.apache.pdfbox.rendering.PDFRenderer;public class pdftest { public static void main(String[] args) { String fileAddress="D:\\data"; String filename="qqq"; String type="jpg"; pdf2png(fileAddress,filename,type); } /** * 转换全部的pdf * @param fileAddress 文件地址 * @param filename PDF文件名 * @param type 图片类型 */ public static void pdf2png(String fileAddress,String filename,String type) { // 将pdf装图片 并且自定义图片得格式大小 File file = new File(fileAddress+"\\"+filename+".pdf"); try { PDDocument doc = PDDocument.load(file); PDFRenderer renderer = new PDFRenderer(doc); int pageCount = doc.getNumberOfPages(); for (int i = 0; i < pageCount; i++) { BufferedImage image = renderer.renderImageWithDPI(i, 144); // Windows native DPI //ImageIO.write(image, type, new File(fileAddress+"\\"+filename+"_"+(i+1)+"."+type)); ImageIO.write(image, type, new File("D:\\data\\html5-ebook-paging-mobile\\files\\mobile\\"+(i+1)+"."+type)); BufferedImage srcImage = resize(image, 240, 240);//产生缩略图 ImageIO.write(srcImage, type, new File("D:\\data\\html5-ebook-paging-mobile\\files\\thumb\\"+(i+1)+"."+type));//产生缩略图 } } catch (IOException e) { e.printStackTrace(); } } /** *自由确定起始页和终止页 * @param fileAddress 文件地址 * @param filename pdf文件名 * @param indexOfStart 开始页 开始转换的页码，从0开始 * @param indexOfEnd 结束页 停止转换的页码，-1为全部 * @param type 图片类型 */ public static void pdf2png(String fileAddress,String filename,int indexOfStart,int indexOfEnd,String type) { // 将pdf装图片 并且自定义图片得格式大小 File file = new File(fileAddress+"\\"+filename+".pdf"); try { PDDocument doc = PDDocument.load(file); PDFRenderer renderer = new PDFRenderer(doc); int pageCount = doc.getNumberOfPages(); for (int i = indexOfStart; i < indexOfEnd; i++) { BufferedImage image = renderer.renderImageWithDPI(i, 144); // Windows native DPI // BufferedImage srcImage = resize(image, 240, 240);//产生缩略图 ImageIO.write(image, type, new File(fileAddress+"\\"+filename+"_"+(i+1)+"."+type)); } } catch (IOException e) { e.printStackTrace(); } } /** * 缩略图 */ private static BufferedImage resize(BufferedImage source, int targetW, int targetH) { int type = source.getType(); BufferedImage target = null; double sx = (double) targetW / source.getWidth(); double sy = (double) targetH / source.getHeight(); if (sx > sy) { sx = sy; targetW = (int) (sx * source.getWidth()); } else { sy = sx; targetH = (int) (sy * source.getHeight()); } if (type == BufferedImage.TYPE_CUSTOM) { ColorModel cm = source.getColorModel(); WritableRaster raster = cm.createCompatibleWritableRaster(targetW, targetH); boolean alphaPremultiplied = cm.isAlphaPremultiplied(); target = new BufferedImage(cm, raster, alphaPremultiplied, null); } else { target = new BufferedImage(targetW, targetH, type); } Graphics2D g = target.createGraphics(); g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY); g.drawRenderedImage(source, AffineTransform.getScaleInstance(sx, sy)); g.dispose(); return target; }}