SpringBoot集成aspose实现cad、word、excle、ppt在线预览

实现思路：
将cad(dwg、dxf、dwf)、word(doc、docx)、excle（xls,xlsx）、ppt(ppt,pptx)等类型的文件转为pdf
然后前端通过pdfjs实现预览

一、引入依赖

<!-- 导入本地jar -->
<!-- 操作ppt -->
<dependency><groupId>com.aspose</groupId><artifactId>aspose-slides</artifactId><version>1.0</version><scope>system</scope><systemPath>${project.basedir}/lib/aspose.slides-15.9.0.jar</systemPath>
</dependency>
<!-- 操作excel -->
<dependency><groupId>com.aspose</groupId><artifactId>aspose-cells</artifactId><version>1.0</version><scope>system</scope><systemPath>${project.basedir}/lib/aspose-cells-8.5.2.jar</systemPath>
</dependency>
<!-- 操作word-->
<dependency><groupId>com.aspose</groupId><artifactId>aspose-words</artifactId><version>1.0</version><scope>system</scope><systemPath>${project.basedir}/lib/aspose-words-18.6-jdk16.jar</systemPath>
</dependency>
<!-- 操作cad-->
<dependency><groupId>com.aspose</groupId><artifactId>aspose-cad</artifactId><version>1.0</version><scope>system</scope><systemPath>${project.basedir}/lib/aspose-cad-19.9.jar</systemPath>
</dependency>
<!-- 操作文本文件-->
<dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.5.13</version></dependency>

二、编写工具类

package com.logan.base.util;
import com.aspose.cad.Color;
import com.aspose.cad.Image;
import com.aspose.cad.imageoptions.CadRasterizationOptions;
import com.aspose.cad.imageoptions.PdfOptions;
import com.aspose.cells.Workbook;
import com.aspose.slides.Presentation;
import com.aspose.words.Document;
import com.aspose.words.License;
import com.aspose.words.SaveFormat;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Font;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfWriter;
import org.springframework.core.io.ClassPathResource;
import java.io.*;/**
* @author:logan
* @ClassName: PdfUtil
* @date: 2021/6/3  17:27
* @Description: TODO
*/
public class PdfUtil {private static final String myLicense = "<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>";public static void othersToPdf(String extension,InputStream in,OutputStream out) {if ("doc".equalsIgnoreCase(extension) || "docx".equalsIgnoreCase(extension)) {wordToPdf(in,out);}else if ("xls".equalsIgnoreCase(extension) || "xlsx".equalsIgnoreCase(extension)) {excelToPdf(in,out);}else if ("ppt".equalsIgnoreCase(extension) || "pptx".equalsIgnoreCase(extension)) {pptToPdf(in,out);}else if ("txt".equalsIgnoreCase(extension)) {txtToPdf(in,out);}else if ("dwg".equalsIgnoreCase(extension)||"dwf".equalsIgnoreCase(extension)||"dxf".equalsIgnoreCase(extension)) {cadToPdf(in,out);}}/*** word转pdf* @param inputStream* @param outputStream*/public static void wordToPdf(InputStream inputStream, OutputStream outputStream) {ByteArrayInputStream licenseInputStream = null;try{//设置证书licenseInputStream = new ByteArrayInputStream(myLicense.getBytes());License wordLicense = new License();wordLicense.setLicense(licenseInputStream);//转化Document document = new Document(inputStream);document.save(outputStream, SaveFormat.PDF);licenseInputStream.close();}catch (Exception e){e.printStackTrace();System.out.println("word转PDF失败");}}/*** excel转pdf* @param inputStream* @param outputStream*/public static void excelToPdf(InputStream inputStream,OutputStream outputStream){ByteArrayInputStream licenseInputStream = null;try {//设置证书licenseInputStream = new ByteArrayInputStream(myLicense.getBytes());com.aspose.cells.License wordLicense = new com.aspose.cells.License();wordLicense.setLicense(licenseInputStream);//转化Workbook workbook = new Workbook(inputStream);workbook.save(outputStream, 13);licenseInputStream.close();} catch (Exception e) {e.printStackTrace();System.out.println("excel转pdf失败");}}/*** ppt转pdf* @param inputStream* @param outputStream*/public static void pptToPdf(InputStream inputStream,OutputStream outputStream){ByteArrayInputStream licenseInputStream = null;try {//设置证书licenseInputStream = new ByteArrayInputStream(myLicense.getBytes());com.aspose.slides.License wordLicense = new com.aspose.slides.License();wordLicense.setLicense(licenseInputStream);//转化Presentation presentation = new Presentation(inputStream);presentation.save(outputStream, 1);licenseInputStream.close();} catch (Exception e) {e.printStackTrace();System.out.println("ppt转pdf失败");}}/*** txt文档转pdf* @param inputStream* @param outputStream*/public static void txtToPdf(InputStream inputStream,OutputStream outputStream) {com.itextpdf.text.Document document = new com.itextpdf.text.Document();ClassPathResource classPathResource = new ClassPathResource("/font/simhei.ttf");try {PdfWriter.getInstance(document,outputStream);document.open();BaseFont baseFont = BaseFont.createFont(classPathResource.getPath(), BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);Font font = new Font(baseFont);InputStreamReader isr = new InputStreamReader(inputStream, "GBK");BufferedReader bufferedReader = new BufferedReader(isr);String str = "";while ((str = bufferedReader.readLine()) != null) {document.add(new Paragraph(str, font));}document.close();} catch (DocumentException e) {e.printStackTrace();System.out.println("txt转pdf失败");} catch (IOException e) {e.printStackTrace();}}/*** cad文件转pdf* @param inputStream* @param outputStream*/public static void cadToPdf(InputStream inputStream,OutputStream outputStream) {Image objImage = Image.load(inputStream);CadRasterizationOptions rasterizationOptions = new  CadRasterizationOptions();//设置属性rasterizationOptions.setBackgroundColor(Color.getBlack());rasterizationOptions.setPageWidth(1400);rasterizationOptions.setPageHeight(650);rasterizationOptions.setAutomaticLayoutsScaling(true);rasterizationOptions.setNoScaling (false);rasterizationOptions.setDrawType(1);PdfOptions pdfOptions = new PdfOptions();pdfOptions.setVectorRasterizationOptions(rasterizationOptions);objImage.save(outputStream,pdfOptions);objImage.close();}}

三、使用工具类

@ApiOperation(value = "下载：文件(pdf格式)",notes = "下载文件(pdf格式)")
@GetMapping("/download/{fileId}")
public void download(@ApiParam(value = "fileId",required = true)@PathVariable(value = "fileId",required = true)Integer fileId,HttpServletResponse response) {InputStream in;try {Map<String,Object> file = commonService.getMaterialFile(fileId);String fileName = MapUtil.getString(file,"FILENAME");String extension = MapUtil.getString(file,"EXTENSION");String newFileName = fileName.substring(0,fileName.lastIndexOf("."));//原始下载操作in = commonService.downloadMaterial(fileId);response.setContentType("application/x-msdownload;charset=utf-8");response.setHeader("Content-Disposition","attachment; filename=\"" + URLEncoder.encode(newFileName+".pdf","UTF-8")+ "\"");OutputStream out = response.getOutputStream();//pdf的直接返回文件流if ("pdf".equalsIgnoreCase(extension)) {IOUtils.copy(in,out);}else {//其他类型转为pdfPdfUtil.othersToPdf(extension,in,out);}out.close();in.close();}catch (IOException e) {e.printStackTrace();}
}

四、前端使用pdfjs预览pdf

1.引入js后在html定义一个div

<!-- 全屏弹出框=>文件预览     -->
<div id="dialogFull" class="bui-dialog" style="display: none;"><div ng-show="!notSupport" class="bui-dialog-head">{{filePopUpData.FILENAME}}</div><div ng-show="notSupport">当前文件不支持预览</div><!-- pdf文件预览 --><div class="bui-dialog-main" id="pdf-div" style="width: 100%;height: 900px"></div><div class="bui-dialog-close"><i class="icon-close"></i></div>
</div>

2.对应html的js中将文件下载地址按格式拼接在预览地址后

//固定格式：/static/pdfjs/web/viewer.html?file=+文件路径
url = "../static/pdfjs/web/viewer.html?file=" + fileUrl;
$('#pdf-div').media({src: url,width: "100%",height: "667px"
});
//弹出
DialogFull.open();

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SpringBoot集成aspose实现cad、word、excle、ppt在线预览

一、引入依赖

二、编写工具类

三、使用工具类

四、前端使用pdfjs预览pdf

1.引入js后在html定义一个div

2.对应html的js中将文件下载地址按格式拼接在预览地址后

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