本文是基于PDF文档转PNG图片,然后进行图片拼接，拼接后的图片转为base64字符串，然后拼接html文档写入html文件实现PDF文档转HTML文档。
引入Maven依赖
<!-- /artifact/org.apache.pdfbox/pdfbox --><dependency><groupId>org.apache.pdfbox</groupId><artifactId>pdfbox</artifactId><version>2.0.12</version></dependency>
工具实现类
package com.frame.utils;import org.apache.pdfbox.pdmodel.PDDocument;import org.apache.pdfbox.rendering.PDFRenderer;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;import javax.imageio.ImageIO;import java.awt.*;import java.awt.image.BufferedImage;import java.io.*;/*** PDF文档转HTML文档* @author LXW* @date /6/17 16:45*/public class PdfConvertHtmlUtil {/*** 日志对象*/private static Logger logger = LoggerFactory.getLogger(PdfConvertHtmlUtil.class);/*** PDF文档流转Png* @param pdfFileInputStream* @return BufferedImage*/public static BufferedImage pdfStreamToPng(InputStream pdfFileInputStream){PDDocument doc = null;PDFRenderer renderer = null;try {doc = PDDocument.load(pdfFileInputStream);renderer = new PDFRenderer(doc);int pageCount = doc.getNumberOfPages();BufferedImage image = null;for (int i = 0; i < pageCount; i++) {if (image != null) {image = combineBufferedImages(image, renderer.renderImageWithDPI(i, 144));}if (i == 0) {image = renderer.renderImageWithDPI(i, 144); // Windows native DPI}// BufferedImage srcImage = resize(image, 240, 240);//产生缩略图}return combineBufferedImages(image);} catch (IOException e) {e.printStackTrace();}finally {try {if(doc != null){doc.close();}} catch (IOException e) {e.printStackTrace();}}return null;}/***BufferedImage拼接处理，添加分割线* @param images* @return BufferedImage*/public static BufferedImage combineBufferedImages(BufferedImage... images) {int height = 0;int width = 0;for (BufferedImage image : images) {//height += Math.max(height, image.getHeight());height += image.getHeight();width = image.getWidth();}BufferedImage combo = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);Graphics2D g2 = combo.createGraphics();int x = 0;int y = 0;for (BufferedImage image : images) {//int y = (height - image.getHeight()) / 2;g2.setStroke(new BasicStroke(2.0f));// 线条粗细g2.setColor(new Color(193, 193, 193));// 线条颜色g2.drawLine(x, y, width, y);// 线条起点及终点位置g2.drawImage(image, x, y, null);//x += image.getWidth();y += image.getHeight();}return combo;}/*** 通过Base64创建HTML文件并输出html文件* @param base64* @param htmlPath html保存路径*/public static void createHtmlByBase64(String base64,String htmlPath) {StringBuilder stringHtml = new StringBuilder();PrintStream printStream = null;try {// 打开文件printStream = new PrintStream(new FileOutputStream(htmlPath));} catch (FileNotFoundException e) {e.printStackTrace();}// 输入HTML文件内容stringHtml.append("<html><head>");stringHtml.append("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">");stringHtml.append("<title></title>");stringHtml.append("</head>");stringHtml.append("<body style=\"\r\n" + " text-align: center;\r\n" + " background-color: #C1C1C1;\r\n" + "\">");stringHtml.append("<img src=\"data:image/png;base64," + base64 + "\" />");stringHtml.append("<a name=\"head\" style=\"position:absolute;top:0px;\"></a>");//添加锚点用于返回首页stringHtml.append("<a style=\"position:fixed;bottom:10px;right:10px\" href=\"#head\">回到首页</a>");stringHtml.append("</body></html>");try {// 将HTML文件内容写入文件中printStream.println(stringHtml.toString());} catch (Exception e) {e.printStackTrace();}finally {if(printStream != null){printStream.close();}}}/*** bufferedImage 转为 base64编码* @param bufferedImage* @return*/public static String bufferedImageToBase64(BufferedImage bufferedImage) {ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();String png_base64 = "";try {ImageIO.write(bufferedImage, "png", byteArrayOutputStream);// 写入流中byte[] bytes = byteArrayOutputStream.toByteArray();// 转换成字节BASE64Encoder encoder = new BASE64Encoder();// 转换成base64串 删除 \r\npng_base64 = encoder.encodeBuffer(bytes).trim().replaceAll("\n", "").replaceAll("\r", "");} catch (IOException e) {e.printStackTrace();}return png_base64;}}
测试Demo
public static void main(String[] args) {File file = new File("F:\\111\\Files\\MySQL查询语句大全集锦(经典珍藏).pdf");String htmlPath = "F:\\111\\Files\\MySQL查询语句大全集锦(经典珍藏).html";InputStream inputStream = null;BufferedImage bufferedImage = null;try {inputStream = new FileInputStream(file);bufferedImage = pdfStreamToPng(inputStream);String base64_png = bufferedImageToBase64(bufferedImage);createHtmlByBase64(base64_png,htmlPath);} catch (FileNotFoundException e) {e.printStackTrace();}finally {try {if(inputStream != null){inputStream.close();}} catch (IOException e) {e.printStackTrace();}}}
