前提：

面对各种文件转换pdf格式，我下面写的都是一些方法，其中每个方法都以流的方式进行参数的传递。

通过猿友的帮忙，修改了部分jar包，解决excel转换pdf导致的水印问题~

源码链接：/s/1twLNvNE-e0AEa5EVetyOFA

提取码：asdf

jar包 例如com.aspose的包在项目的myjar目录中，需要手动导入。其他的jar包，例如itextpdf可通过依赖直接导入

（上传的项目代码里面ppt/pptx还没有更新代码，主要是修复ppt、pptx转pdf的汉字乱码问题，最新的代码请参考文章，文章内容是最新的）

```java<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-scratchpad</artifactId><version>4.1.2</version></dependency><dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.4.3</version></dependency><dependency><groupId>com.itextpdf</groupId><artifactId>itext-asian</artifactId><version>5.2.0</version></dependency><dependency><groupId>org.docx4j</groupId><artifactId>docx4j</artifactId><version>3.2.2</version></dependency><!-- 从外面导包进来 项目的myJar com.aspose --><!-- 下面的依赖是为了报其他错误的 --><dependency><groupId>org.apache.xmlbeans</groupId><artifactId>xmlbeans</artifactId><version>5.0.3</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml-schemas</artifactId><version>4.1.2</version></dependency><dependency><groupId>mons</groupId><artifactId>commons-compress</artifactId><version>1.19</version></dependency><dependency><groupId>mons</groupId><artifactId>commons-collections4</artifactId><version>4.1</version></dependency><dependency><groupId>com.zaxxer</groupId><artifactId>SparseBitSet</artifactId><version>1.2</version></dependency><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.6.0</version></dependency><!-- 修改com.aspose.cells专用包 --><!--<dependency>--><!--<groupId>org.javassist</groupId>--><!--<artifactId>javassist</artifactId>--><!--<version>3.26.0-GA</version>--><!--</dependency>-->

# 工具类主体:```javaimport com.aspose.words.*;import com.itextpdf.text.Document;import com.itextpdf.text.Image;import com.itextpdf.text.*;import com.itextpdf.text.pdf.*;import org.apache.poi.hslf.usermodel.*;import org.apache.poi.xslf.usermodel.*;import java.awt.*;import java.awt.Color;import java.awt.image.BufferedImage;import java.io.*;import java.util.List;public final class PdfConverUtil {// 这里放下面的方法xxxx...}

img(png)转换pdf：

关于图片转换pdf的像素问题，可以设置转换pdf的大小来控制

/*** @param inputStream 源文件输入流* @param outputStream pdf文件输出流**/public static boolean imgToPdf(InputStream inputStream, OutputStream outputStream) {Document document = null;try {// 创建文档,设置PDF页面的大小 A2-A9, 个人觉得A3最合适document = new Document(PageSize.A3, 20, 20, 20, 20);// 新建pdf文档,具体逻辑看.getInstance方法PdfWriter.getInstance(document, outputStream);document.open();document.newPage();// 将文件流转换为字节流，便于格式转换BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();byte[] bytes = new byte[1024];int length = 0 ;while (-1 != (length = bufferedInputStream.read(bytes))) {byteArrayOutputStream.write(bytes, 0, length);}// 处理img图片Image image = Image.getInstance(byteArrayOutputStream.toByteArray());float height = image.getHeight();float width = image.getWidth();float percent = 0.0f;// 设置像素或者长宽高,将会影响图片的清晰度，因为只是对图片放大或缩小if (height > width) {// A4 - A9percent = PageSize.A6.getHeight() / height * 100;} else {percent = PageSize.A6.getWidth() / width * 100;}image.setAlignment(Image.MIDDLE);image.scalePercent(percent);// 将图片放入文档中，完成pdf转换document.add(image);System.out.println("image转换完毕");} catch (Exception e) {e.printStackTrace();return false;} finally {try {if (document != null) {document.close();}} catch (Exception e) {e.printStackTrace();}}return true;}

word(doc/docx)转换pdf：

该方法运行可能出现警告：（可忽略，不影响pdf文件生成！）

WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(…) returned error code 5.

解决方法: /zQn6C

/*** @param inputStream 源文件输入流* @param outputStream pdf文件输出流**/public static boolean wordTopdfByAspose(InputStream inputStream, OutputStream outputStream) {// 验证License 若不验证则转化出的pdf文档会有水印产生if (!getLicense()) {return false;}try {// 将源文件保存在com.aspose.words.Document中，具体的转换格式依靠里面的save方法com.aspose.words.Document doc = new com.aspose.words.Document(inputStream);// 全面支持DOC, DOCX, OOXML, RTF HTML, OpenDocument, PDF,EPUB, XPS, SWF 相互转换doc.save(outputStream, SaveFormat.PDF);System.out.println("word转换完毕");} catch (Exception e) {e.printStackTrace();return false;}finally {if (outputStream != null) {try {outputStream.flush();outputStream.close();} catch (IOException e) {e.printStackTrace();}}}return true;}// 官方文档的要求 无需理会public static boolean getLicense() {boolean result = false;try {String s = "<License><Data><Products><Product>Aspose.Total for Java</Product><Product>Aspose.Words for Java</Product></Products><EditionType>Enterprise</EditionType><SubscriptionExpiry>20991231</SubscriptionExpiry><LicenseExpiry>20991231</LicenseExpiry><SerialNumber>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7</SerialNumber></Data><Signature>sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=</Signature></License>";ByteArrayInputStream is = new ByteArrayInputStream(s.getBytes());License aposeLic = new License();aposeLic.setLicense(is);result = true;} catch (Exception e) {e.printStackTrace();}return result;}

excel(xlsx)转换pdf：

excel中的 Workbook 使用的是 com.aspose.cells 包下的。注意！！！

至于sheet相关，分页问题，可以据情况修改方法printSheetPage()和autoDraw()

/*** @param inputStream 源文件输入流* @param outputStream pdf文件输出流**/public static boolean excelToPdf(InputStream inputStream, OutputStream outputStream) {// 验证License 若不验证则转化出的pdf文档会有水印产生if (!getExeclLicense()) {return false;}try {com.aspose.cells.Workbook wb = new com.aspose.cells.Workbook(inputStream);// 原始excel路径com.aspose.cells.PdfSaveOptions pdfSaveOptions = new com.aspose.cells.PdfSaveOptions();pdfSaveOptions.setOnePagePerSheet(false);int[] autoDrawSheets={3};//当excel中对应的sheet页宽度太大时，在PDF中会拆断并分页。此处等比缩放。autoDraw(wb,autoDrawSheets);int[] showSheets={0};//隐藏workbook中不需要的sheet页。printSheetPage(wb,showSheets);wb.save(outputStream, pdfSaveOptions);outputStream.flush();outputStream.close();System.out.println("excel转换完毕");} catch (IOException e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();}return true;}/*** 设置打印的sheet 自动拉伸比例* @param wb* @param page 自动拉伸的页的sheet数组*/public static void autoDraw(com.aspose.cells.Workbook wb,int[] page){if(null!=page&&page.length>0){for (int i = 0; i < page.length; i++) {wb.getWorksheets().get(i).getHorizontalPageBreaks().clear();wb.getWorksheets().get(i).getVerticalPageBreaks().clear();}}}/*** 隐藏workbook中不需要的sheet页。** @param wb* @param page 显示页的sheet数组*/public static void printSheetPage(com.aspose.cells.Workbook wb, int[] page) {for (int i = 1; i < wb.getWorksheets().getCount(); i++) {wb.getWorksheets().get(i).setVisible(false);}if (null == page || page.length == 0) {wb.getWorksheets().get(0).setVisible(true);} else {for (int i = 0; i < page.length; i++) {wb.getWorksheets().get(i).setVisible(true);}}}public static boolean getExeclLicense() {boolean result = false;try {String s = "<License><Data><Products><Product>Aspose.Total for Java</Product><Product>Aspose.Words for Java</Product></Products><EditionType>Enterprise</EditionType><SubscriptionExpiry>20991231</SubscriptionExpiry><LicenseExpiry>20991231</LicenseExpiry><SerialNumber>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7</SerialNumber></Data><Signature>sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=</Signature></License>";ByteArrayInputStream is = new ByteArrayInputStream(s.getBytes());com.aspose.cells.License aposeLic = new com.aspose.cells.License();aposeLic.setLicense(is);result = true;} catch (Exception e) {e.printStackTrace();}return result;}

ppt(ppt/pptx)转换pdf：

ppt和pptx使用的Document类是 com.itextpdf.text包下面,注意！由于ppt和pptx的编码格式不一样，所以单独写了针对ppt 和 pptx 的转换

/*** pptToPdf* @param inputStream* @param outputStream* @return*/public static boolean pptToPdf(InputStream inputStream, OutputStream outputStream) {Document document = null;HSLFSlideShow hslfSlideShow = null;PdfWriter pdfWriter = null;try {hslfSlideShow = new HSLFSlideShow(inputStream);// 获取ppt文件页面Dimension dimension = hslfSlideShow.getPageSize();document = new Document();// pdfWriter实例pdfWriter = PdfWriter.getInstance(document, outputStream);document.open();PdfPTable pdfPTable = new PdfPTable(1);List<HSLFSlide> hslfSlideList = hslfSlideShow.getSlides();for (int i=0; i < hslfSlideList.size(); i++) {HSLFSlide hslfSlide = hslfSlideList.get(i);// 设置字体, 解决中文乱码for (HSLFShape shape : hslfSlide.getShapes()) {if (shape instanceof HSLFTextShape) {HSLFTextShape textShape = (HSLFTextShape) shape;for (HSLFTextParagraph textParagraph : textShape.getTextParagraphs()) {for (HSLFTextRun textRun : textParagraph.getTextRuns()) {textRun.setFontFamily("宋体");}}}}BufferedImage bufferedImage = new BufferedImage((int)dimension.getWidth(), (int)dimension.getHeight(), BufferedImage.TYPE_INT_RGB);Graphics2D graphics2d = bufferedImage.createGraphics();graphics2d.setPaint(Color.white);graphics2d.setFont(new java.awt.Font("宋体", java.awt.Font.PLAIN, 12));hslfSlide.draw(graphics2d);graphics2d.dispose();Image image = Image.getInstance(bufferedImage, null);image.scalePercent(50f);// 写入单元格pdfPTable.addCell(new PdfPCell(image, true));document.add(image);}} catch (Exception e) {e.printStackTrace();return false;} finally {if (document != null) {document.close();}if (pdfWriter != null) {pdfWriter.close();}}System.out.println("ppt转换完毕");return true;}/*** pptxToPdf* @param inputStream* @param outputStream* @return*/public static boolean pptxToPdf(InputStream inputStream, OutputStream outputStream) {Document document = null;XMLSlideShow slideShow = null;PdfWriter pdfWriter = null;try {slideShow = new XMLSlideShow(inputStream);Dimension dimension = slideShow.getPageSize();document = new Document();pdfWriter = PdfWriter.getInstance(document, outputStream);document.open();PdfPTable pdfPTable = new PdfPTable(1);List<XSLFSlide> slideList = slideShow.getSlides();for (int i = 0, row = slideList.size(); i < row; i++) {XSLFSlide slide = slideList.get(i);// 设置字体, 解决中文乱码for (XSLFShape shape : slide.getShapes()) {if (shape instanceof XSLFTextShape) {XSLFTextShape textShape = (XSLFTextShape) shape;for (XSLFTextParagraph textParagraph : textShape.getTextParagraphs()) {for (XSLFTextRun textRun : textParagraph.getTextRuns()) {textRun.setFontFamily("宋体");}}}}BufferedImage bufferedImage = new BufferedImage((int)dimension.getWidth(), (int)dimension.getHeight(), BufferedImage.TYPE_INT_RGB);Graphics2D graphics2d = bufferedImage.createGraphics();graphics2d.setPaint(Color.white);graphics2d.setFont(new java.awt.Font("宋体", java.awt.Font.PLAIN, 12));slide.draw(graphics2d);graphics2d.dispose();Image image = Image.getInstance(bufferedImage, null);image.scalePercent(50f);// 写入单元格pdfPTable.addCell(new PdfPCell(image, true));document.add(image);}} catch (Exception e) {e.printStackTrace();return false;} finally {if (document != null) {document.close();}if (pdfWriter != null) {pdfWriter.close();}}System.out.println("pptx转换完毕");return true;}

测试

import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;/*** 功能说明:* 开发人员: zhouyangyang* 开发时间: /6/28 <br>* 功能描述: 写明作用，调用方式，使用场景，以及特殊情况<br>*/public class Test {public static void main(String[] args) {// imgae to pdftry {FileInputStream inputStream = new FileInputStream("D:\\testConvert\\银行卡.jpg");FileOutputStream byteArrayOutputStream = new FileOutputStream("D:\\testConvert\\银行卡.pdf");PdfConverUtil.imgToPdf(inputStream, byteArrayOutputStream);} catch (FileNotFoundException e) {e.printStackTrace();}// doc/docx to pdftry {FileInputStream inputStream = new FileInputStream("D:\\testConvert\\zyydocx.docx");FileOutputStream byteArrayOutputStream = new FileOutputStream("D:\\testConvert\\zyydocx.pdf");PdfConverUtil.wordTopdfByAspose(inputStream, byteArrayOutputStream);} catch (FileNotFoundException e) {e.printStackTrace();}// execl to pdftry {FileInputStream inputStream = new FileInputStream("D:\\testConvert\\zyyexcel.xls");FileOutputStream byteArrayOutputStream = new FileOutputStream("D:\\testConvert\\zyyexcel.pdf");PdfConverUtil.excelToPdf(inputStream, byteArrayOutputStream);} catch (FileNotFoundException e) {e.printStackTrace();}// ppt tp pdftry {FileInputStream inputStream = new FileInputStream("D:\\testConvert\\zyy123ppt.ppt");FileOutputStream byteArrayOutputStream = new FileOutputStream("D:\\testConvert\\zyy123pptnew.pdf");PdfConverUtil.pptToPdf(inputStream, byteArrayOutputStream);} catch (FileNotFoundException e) {e.printStackTrace();}// pptx to pdftry {FileInputStream inputStream = new FileInputStream("D:\\testConvert\\zyypptx.pptx");FileOutputStream byteArrayOutputStream = new FileOutputStream("D:\\testConvert\\zyypptxnew.pdf");PdfConverUtil.pptxToPdf(inputStream, byteArrayOutputStream);} catch (FileNotFoundException e) {e.printStackTrace();}}}

如图：