1.思路,利用FTL（freemarker）生成word文档

2.利用免费工具aspose将word转换PDF

３使用PDF.JS在线预览。

第一步比较多，就不一一代码。本次主要讲2，3步

源码如下：AsposeUtil.java,把word转换PDF，存放本地，

1.需要JAR包

百度网盘 请输入提取码 提取码： 630z

2.配置POM.xml

<dependency><groupId>com.aspose</groupId><artifactId>aspose-words</artifactId><version>0.0.1-SNAPSHOT</version><scope>system</scope><systemPath>${project.basedir}/outlib/aspose-words-16.8.0-jdk16.jar</systemPath></dependency><dependency><groupId>com.aspose</groupId><artifactId>aspose-cells</artifactId><version>0.0.1-SNAPSHOT</version><scope>system</scope><systemPath>${project.basedir}/outlib/aspose-cells-8.5.2(1).jar</systemPath></dependency><dependency><groupId>com.aspose</groupId><artifactId>aspose-slides</artifactId><version>0.0.1-SNAPSHOT</version><scope>system</scope><systemPath>${project.basedir}/outlib/aspose.slides-15.9.0.jar</systemPath></dependency><dependency><groupId>cn.hutool</groupId><artifactId>hutool-core</artifactId><version>5.6.5</version></dependency>

 3.配置，防止乱码， license.xml代码内容

<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>

4.WORD转PDF源码：

package com.bootdo.common.utils;import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.math.RoundingMode;
import java.text.DecimalFormat;import com.aspose.cells.PdfSaveOptions;
import com.aspose.cells.Workbook;
import com.aspose.slides.Presentation;
import com.aspose.words.Document;
import com.aspose.words.SaveFormat;public class AsposeUtil {/*** 获取license** @return*/public static boolean getLicense(int type) {boolean result = false;try {InputStream is = AsposeUtil.class.getClassLoader().getResourceAsStream("license.xml");if (type == 1) {//excelcom.aspose.cells.License aposeLic = new com.aspose.cells.License();aposeLic.setLicense(is);result = true;} else if (type == 2) {//wordcom.aspose.words.License aposeLic = new com.aspose.words.License();aposeLic.setLicense(is);result = true;} else {//pptcom.aspose.slides.License aposeLic = new com.aspose.slides.License();aposeLic.setLicense(is);result = true;}} catch (Exception e) {e.printStackTrace();}return result;}public static void Excel2Pdf(String officePath,String OutPutPath,String officeName) {// 验证Licenseif (!getLicense(1)) {return;}try {File file = new File(OutPutPath);if (!file.exists()) {file.mkdirs();}
//            long old = Sysout.currentTimeMillis();Workbook wb = new Workbook(officePath);// 原始excel路径File pdfFile = new File(OutPutPath+officeName);// 输出路径FileOutputStream fileOS = new FileOutputStream(pdfFile);//wb.save(fileOS, com.aspose.cells.SaveFormat.PDF);PdfSaveOptions pdfSaveOptions = new PdfSaveOptions();pdfSaveOptions.setAllColumnsInOnePagePerSheet(true);wb.save(fileOS, pdfSaveOptions);
//            long now = Sysout.currentTimeMillis();
//            Sysout.println("共耗时：" + ((now - old) / 1000.0) + "秒");} catch (Exception e) {e.printStackTrace();}}public static void main(String[] args) throws Exception {AsposeUtil bean = new AsposeUtil();
//        bean.word2Pdf2("D:\\pdf\\12.docx","D:\\pdf\\12.pdf");bean.word2Pdf2("C:\\wordTemple\\han.docx","C:\\wordTemple\\1234.pdf");}public  void word2Pdf2(String inpath,String outpath) throws Exception {if (!getLicense(2)) {System.out.println("非法------------");return;}long old = System.currentTimeMillis();File file = new File(outpath);FileOutputStream os = new FileOutputStream(file);//解决乱码//如果是windows执行，不需要加这个//TODO 如果是linux执行，需要添加这个*****//FontSettings.setFontsFolder("/usr/share/fonts",true);Document doc = new Document(inpath);//全面支持DOC, DOCX, OOXML, RTF HTML, OpenDocument, PDF, EPUB, XPS, SWF 相互转换doc.save(os, SaveFormat.PDF);long now = System.currentTimeMillis();System.out.println("共耗时：" + ((now - old) / 1000.0) + "秒");}public static void Word2Pdf(String officePath,String OutPutPath,String officeName) {// 验证Licenseif (!getLicense(2)) {return;}try {File file = new File(OutPutPath);if (!file.exists()) {file.mkdirs();}Document doc = new Document(officePath);// 原始word路径File pdfFile = new File(OutPutPath+officeName);// 输出路径FileOutputStream fileOS = new FileOutputStream(pdfFile);doc.save(fileOS, com.aspose.words.SaveFormat.PDF);} catch (Exception e) {e.printStackTrace();}}public static void PPT2Pdf(String officePath,String OutPutPath,String officeName) {// 验证Licenseif (!getLicense(3)) {return;}try {File PathFile = new File(OutPutPath);if (!PathFile.exists()) {PathFile.mkdirs();}InputStream slides = new FileInputStream(new File(officePath));// 原始ppt路径Presentation pres = new Presentation(slides);File file = new File(OutPutPath+officeName);// 输出pdf路径FileOutputStream fileOS = new FileOutputStream(file);pres.save(fileOS, com.aspose.slides.SaveFormat.Pdf);} catch (Exception e) {e.printStackTrace();}}public static String OfficeToPdf(String officePath) {//G:/product/WebApp/fwis_develop/com/is/flywings/oa/attchfile/1000000000/i0002/101951.docx⌒101951.docx⌒feiyu.docxString[] split = officePath.split("⌒");int lastIndex = split[0].lastIndexOf(".");int lastNameIndex = split[0].lastIndexOf("/");String officeType = split[0].substring(lastIndex+1);String officeName = split[0].substring(lastNameIndex+1,lastIndex)+".pdf";String OutPutPath = split[0].substring(0,lastNameIndex+1)+"office/";File file = new File(split[0]);File pdfFile = new File(OutPutPath+officeName);//判断当前office文件是否已经转为PDF,如果已转为PDF就不需要再次转换。if(pdfFile.exists()){return OutPutPath+officeName;}if (file.exists()) {double bytes = file.length();double kilobytes = (bytes / 1024);double megabytes = (kilobytes / 1024);DecimalFormat df = new DecimalFormat("0.00");df.setRoundingMode(RoundingMode.HALF_UP);String MB = df.format(megabytes);Double Size = Double.parseDouble(MB);if(Size>10){return Size+"MB";}//"doc", "docx", "xls","xlsx", "ppt", "pptx"try {if(officeType.equals("doc")||officeType.equals("docx")){Word2Pdf(split[0],OutPutPath,officeName);}else if(officeType.equals("xls")||officeType.equals("xlsx")){Excel2Pdf(split[0],OutPutPath,officeName);}else if(officeType.equals("ppt")||officeType.equals("pptx")){PPT2Pdf(split[0],OutPutPath,officeName);}else{System.out.println("无法识别该文件！");return "Error";}} catch (Exception e) {e.printStackTrace();}} else {return "NotExists";}return OutPutPath+officeName;}}

      第二步就完成了，接下来下载PDF.js  

1. pdf.js文件 下载后放入到项目静态文件夹（下载地址：PDF.js）
2. 可运行的springboot项目

首先为了直观的展示，springboot直接返回一个写死文件路径的输出流

前端获取展示

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>pdf预览</title>
</head>
<body>
<h1 onclick="onLineReadPDF()" style="cursor: pointer;color:blue">在线阅读PDF文件</h1><script>function onLineReadPDF() {var id=$("#id").val();var addPage =layer.open({type : 2,title : '预览',maxmin : true,shadeClose : false, // 点击遮罩关闭层area : [ '600px', '460px' ],content : '/mypdf/web/viewer.html?file=/xiewai/api/file/onlinePreview/'+id //content : prefix + '/api/file/onlinePreview/'+id // iframe的url});layer.full(addPage);}
</script>
</body>
</html>

 /mypdf/web/viewer.html是下载的PDF文件包(放在static文件路径下)，后面的路径是接口的方法，可通过传id等参数查询生成word

我的方法是：

//生成采集文件文档@GetMapping("/api/file/onlinePreview/{id}")void   onlinePreview(@PathVariable("id") String id, HttpServletResponse response, HttpServletRequest request,HttpSession session,Model model) throws Exception{//生成word文档Random rd=new Random();String url="docs/xiewai.docx";HashMap<String, Object> parm=new HashMap<String, Object>();parm.put("id", id);List<XieWaiDO>  list=warningRecordService.listXiewai(parm);DocumentHandler dh=new DocumentHandler();response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("UTF-8");String filename = dh.createTaskReportDoc(list,id);model.addAttribute("filename",tem+"files/"+filename);AsposeUtil bean = new AsposeUtil();
//      bean.word2Pdf2("D:\\pdf\\12.docx","D:\\pdf\\12.pdf");String inpath=loadAddress+"\\"+filename;String curr="X"+System.currentTimeMillis()+rd.nextInt(1000);String outPath=loadAddress+"\\"+curr+".pdf";bean.word2Pdf2(inpath,outPath);  File f = new File(outPath);if (f.exists()) {byte[] data = null;FileInputStream input=null;try {input= new FileInputStream(f);data = new byte[input.available()];input.read(data);response.getOutputStream().write(data);} catch (Exception e) {System.out.println("pdf文件处理异常：" + e);}finally{try {if(input!=null){input.close();}} catch (IOException e) {e.printStackTrace();}}}}

这样就可以在线预览了

另外附上生成word 表格的代码,填充word的数据

public String createHanReportDoc(List<XieWaiDO> list,String id,String showname) throws Exception {// 创建数据//Map<String, Object> dataMap = new HashMap<String, Object>();//dataMap =getTaskReportData(dataMap, list);XieWaiDO dataMap = new XieWaiDO();dataMap	=list.get(0);	// 获取模板String mjinfoJson=dataMap.getXwMjInfo();StringBuffer sb=new StringBuffer();List mjInfo = new ArrayList();if(mjinfoJson!=null&&!mjinfoJson.equals("")){JSONArray json=JSONArray.parseArray(mjinfoJson);if(json.size()>0){for(int i=0;i<json.size();i++){Map map = new HashMap();JSONObject job =json.getJSONObject(i);  //String name=(String) job.get("name");if(i!=0&&i!=job.size()-1){sb.append("、");}sb.append(name);}}dataMap.setXwMjInfo(sb.toString());}Date now=new Date();String nowDate=sdf2.format(now);dataMap.setReceiveTime(nowDate);dataMap.setRemarks(showname);Configuration configuration = new Configuration();configuration.setDefaultEncoding("utf-8");configuration.setDirectoryForTemplateLoading(new File(loadAddress));System.out.println(this.getClass().getResource(""));Template t = null;String tem=sdf3.format(new Date());String tt=id+""+tem;String name = "\\han_"+tt+".docx";String ftl="han.ftl";File file = new File(loadAddress + name);try {t = configuration.getTemplate(ftl);t.setEncoding("UTF-8");Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(loadAddress + name), "UTF-8"));t.process(dataMap, out);out.close();} catch (IOException e) {e.printStackTrace();} catch (TemplateException e) {e.printStackTrace();}return name;}

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