• 用JAVA如何实现word文档在线预览

    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

    1. <dependency>
    2.             <groupId>com.asposegroupId>
    3.             <artifactId>aspose-wordsartifactId>
    4.             <version>0.0.1-SNAPSHOTversion>
    5.             <scope>systemscope>
    6.             <systemPath>${project.basedir}/outlib/aspose-words-16.8.0-jdk16.jarsystemPath>
    7.         dependency>
    8.  
    9.         <dependency>
    10.             <groupId>com.asposegroupId>
    11.             <artifactId>aspose-cellsartifactId>
    12.             <version>0.0.1-SNAPSHOTversion>
    13.             <scope>systemscope>
    14.             <systemPath>${project.basedir}/outlib/aspose-cells-8.5.2(1).jarsystemPath>
    15.         dependency>
    16.  
    17.  
    18.         <dependency>
    19.             <groupId>com.asposegroupId>
    20.             <artifactId>aspose-slidesartifactId>
    21.             <version>0.0.1-SNAPSHOTversion>
    22.             <scope>systemscope>
    23.             <systemPath>${project.basedir}/outlib/aspose.slides-15.9.0.jarsystemPath>
    24.         dependency>
    25.         
    26.         
    27.   		<dependency>
    28. 			<groupId>cn.hutoolgroupId>
    29. 			<artifactId>hutool-coreartifactId>
    30. 			<version>5.6.5version>
    31. 		dependency>

     3.配置，防止乱码， license.xml代码内容

    1. <License>
    2.     <Data>
    3.         <Products>
    4.             <Product>Aspose.Total for JavaProduct>
    5.             <Product>Aspose.Words for JavaProduct>
    6.         Products>
    7.         <EditionType>EnterpriseEditionType>
    8.         <SubscriptionExpiry>20991231SubscriptionExpiry>
    9.         <LicenseExpiry>20991231LicenseExpiry>
    10.         <SerialNumber>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7SerialNumber>
    11.     Data>
    12.     <Signature>
    13.     sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=
    14.     Signature>
    15. License>

    4.WORD转PDF源码：

    1. package com.bootdo.common.utils;
    2.  
    3. import java.io.File;
    4. import java.io.FileInputStream;
    5. import java.io.FileOutputStream;
    6. import java.io.InputStream;
    7. import java.math.RoundingMode;
    8. import java.text.DecimalFormat;
    9.  
    10. import com.aspose.cells.PdfSaveOptions;
    11. import com.aspose.cells.Workbook;
    12. import com.aspose.slides.Presentation;
    13. import com.aspose.words.Document;
    14. import com.aspose.words.SaveFormat;
    15.  
    16. public class AsposeUtil {
    17.     /**
    18.      * 获取license
    19.      *
    20.      * @return
    21.      */
    22.     public static boolean getLicense(int type) {
    23.         boolean result = false;
    24.         try {
    25.             InputStream is = AsposeUtil.class.getClassLoader().getResourceAsStream("license.xml");
    26.             if (type == 1) {//excel
    27.                 com.aspose.cells.License aposeLic = new com.aspose.cells.License();
    28.                 aposeLic.setLicense(is);
    29.                 result = true;
    30.             } else if (type == 2) {//word
    31.                 com.aspose.words.License aposeLic = new com.aspose.words.License();
    32.                 aposeLic.setLicense(is);
    33.                 result = true;
    34.             } else {//ppt
    35.                 com.aspose.slides.License aposeLic = new com.aspose.slides.License();
    36.                 aposeLic.setLicense(is);
    37.                 result = true;
    38.             }
    39.         } catch (Exception e) {
    40.             e.printStackTrace();
    41.         }
    42.         return result;
    43.     }
    44.  
    45.     public static void Excel2Pdf(String officePath,String OutPutPath,String officeName) {
    46.         // 验证License
    47.         if (!getLicense(1)) {
    48.             return;
    49.         }
    50.         try {
    51.             File file = new File(OutPutPath);
    52.             if (!file.exists()) {
    53.                 file.mkdirs();
    54.             }
    55. //            long old = Sysout.currentTimeMillis();
    56.             Workbook wb = new Workbook(officePath);// 原始excel路径
    57.             File pdfFile = new File(OutPutPath+officeName);// 输出路径
    58.             FileOutputStream fileOS = new FileOutputStream(pdfFile);
    59.             //wb.save(fileOS, com.aspose.cells.SaveFormat.PDF);
    60.             PdfSaveOptions pdfSaveOptions = new PdfSaveOptions();
    61.             pdfSaveOptions.setAllColumnsInOnePagePerSheet(true);
    62.             wb.save(fileOS, pdfSaveOptions);
    63. //            long now = Sysout.currentTimeMillis();
    64. //            Sysout.println("共耗时：" + ((now - old) / 1000.0) + "秒");
    65.         } catch (Exception e) {
    66.             e.printStackTrace();
    67.         }
    68.     }
    69.     public static void main(String[] args) throws Exception {
    70.         AsposeUtil bean = new AsposeUtil();
    71. //        bean.word2Pdf2("D:\\pdf\\12.docx","D:\\pdf\\12.pdf");
    72.         bean.word2Pdf2("C:\\wordTemple\\han.docx","C:\\wordTemple\\1234.pdf");
    73.     }
    74.     
    75.     public  void word2Pdf2(String inpath,String outpath) throws Exception {
    76.         if (!getLicense(2)) {
    77.             System.out.println("非法------------");
    78.             return;
    79.         }
    80.  
    81.         long old = System.currentTimeMillis();
    82.         File file = new File(outpath);
    83.  
    84.         FileOutputStream os = new FileOutputStream(file);
    85.  
    86.         //解决乱码
    87.         //如果是windows执行，不需要加这个
    88.         //TODO 如果是linux执行，需要添加这个*****
    89.         //FontSettings.setFontsFolder("/usr/share/fonts",true);
    90.  
    91.         Document doc = new Document(inpath);
    92.  
    93.         //全面支持DOC, DOCX, OOXML, RTF HTML, OpenDocument, PDF, EPUB, XPS, SWF 相互转换
    94.         doc.save(os, SaveFormat.PDF);
    95.  
    96.         long now = System.currentTimeMillis();
    97.         System.out.println("共耗时：" + ((now - old) / 1000.0) + "秒");
    98.     }
    99.  
    100.  
    101.     public static void Word2Pdf(String officePath,String OutPutPath,String officeName) {
    102.         // 验证License
    103.         if (!getLicense(2)) {
    104.             return;
    105.         }
    106.         try {
    107.             File file = new File(OutPutPath);
    108.             if (!file.exists()) {
    109.                 file.mkdirs();
    110.             }
    111.             Document doc = new Document(officePath);// 原始word路径
    112.             File pdfFile = new File(OutPutPath+officeName);// 输出路径
    113.             FileOutputStream fileOS = new FileOutputStream(pdfFile);
    114.             doc.save(fileOS, com.aspose.words.SaveFormat.PDF);
    115.         } catch (Exception e) {
    116.             e.printStackTrace();
    117.         }
    118.     }
    119.  
    120.     public static void PPT2Pdf(String officePath,String OutPutPath,String officeName) {
    121.         // 验证License
    122.         if (!getLicense(3)) {
    123.             return;
    124.         }
    125.         try {
    126.             File PathFile = new File(OutPutPath);
    127.             if (!PathFile.exists()) {
    128.                 PathFile.mkdirs();
    129.             }
    130.             InputStream slides = new FileInputStream(new File(officePath));// 原始ppt路径
    131.             Presentation pres = new Presentation(slides);
    132.             File file = new File(OutPutPath+officeName);// 输出pdf路径
    133.             FileOutputStream fileOS = new FileOutputStream(file);
    134.             pres.save(fileOS, com.aspose.slides.SaveFormat.Pdf);
    135.         } catch (Exception e) {
    136.             e.printStackTrace();
    137.         }
    138.     }
    139.  
    140.     public static String OfficeToPdf(String officePath) {
    141.  
    142.         //G:/product/WebApp/fwis_develop/com/is/flywings/oa/attchfile/1000000000/i0002/101951.docx⌒101951.docx⌒feiyu.docx
    143.         String[] split = officePath.split("⌒");
    144.         int lastIndex = split[0].lastIndexOf(".");
    145.         int lastNameIndex = split[0].lastIndexOf("/");
    146.  
    147.         String officeType = split[0].substring(lastIndex+1);
    148.         String officeName = split[0].substring(lastNameIndex+1,lastIndex)+".pdf";
    149.         String OutPutPath = split[0].substring(0,lastNameIndex+1)+"office/";
    150.  
    151.         File file = new File(split[0]);
    152.         File pdfFile = new File(OutPutPath+officeName);
    153.         //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。
    154.         if(pdfFile.exists()){
    155.             return OutPutPath+officeName;
    156.         }
    157.  
    158.         if (file.exists()) {
    159.  
    160.             double bytes = file.length();
    161.             double kilobytes = (bytes / 1024);
    162.             double megabytes = (kilobytes / 1024);
    163.  
    164.             DecimalFormat df = new DecimalFormat("0.00");
    165.             df.setRoundingMode(RoundingMode.HALF_UP);
    166.             String MB = df.format(megabytes);
    167.             Double Size = Double.parseDouble(MB);
    168.             if(Size>10){
    169.                 return Size+"MB";
    170.             }
    171.             //"doc", "docx", "xls","xlsx", "ppt", "pptx"
    172.             try {
    173.                 if(officeType.equals("doc")||officeType.equals("docx")){
    174.                     Word2Pdf(split[0],OutPutPath,officeName);
    175.                 }else if(officeType.equals("xls")||officeType.equals("xlsx")){
    176.                     Excel2Pdf(split[0],OutPutPath,officeName);
    177.                 }else if(officeType.equals("ppt")||officeType.equals("pptx")){
    178.                     PPT2Pdf(split[0],OutPutPath,officeName);
    179.                 }else{
    180.                     System.out.println("无法识别该文件！");
    181.                     return "Error";
    182.                 }
    183.             } catch (Exception e) {
    184.                 e.printStackTrace();
    185.             }
    186.         } else {
    187.             return "NotExists";
    188.         }
    189.         return OutPutPath+officeName;
    190.     }
    191.  
    192. }

          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

    1. html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <title>pdf预览title>
    6. head>
    7. <body>
    8. <h1 onclick="onLineReadPDF()" style="cursor: pointer;color:blue">在线阅读PDF文件h1>
    9.  
    10. <script>
    11.     function onLineReadPDF() {
    12.        	var id=$("#id").val();
    13. 	var addPage =layer.open({
    14. 		type : 2,
    15. 		title : '预览',
    16. 		maxmin : true,
    17. 		shadeClose : false, // 点击遮罩关闭层
    18. 		area : [ '600px', '460px' ],
    19. 		content : '/mypdf/web/viewer.html?file=/xiewai/api/file/onlinePreview/'+id 
    20. 		//content : prefix + '/api/file/onlinePreview/'+id // iframe的url
    21. 	});
    22. 	 layer.full(addPage);
    23.     }
    24. script>
    25. body>
    26. 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：

    1. //生成采集文件文档
    2. 	@GetMapping("/api/file/onlinePreview/{id}")
    3. 	void   onlinePreview(@PathVariable("id") String id, HttpServletResponse response, HttpServletRequest request,HttpSession session,Model model) throws Exception{
    4. 		//生成word文档
    5. 		Random rd=new Random();
    6. 		String url="docs/xiewai.docx";
    7. 		HashMap parm=new HashMap();
    8. 		parm.put("id", id);
    9. 		List  list=warningRecordService.listXiewai(parm);
    10. 		DocumentHandler dh=new DocumentHandler();
    11. 	    response.setContentType("text/html;charset=utf-8");
    12. 	    request.setCharacterEncoding("UTF-8");
    13. 	    String filename = dh.createTaskReportDoc(list,id);
    14. 	    model.addAttribute("filename",tem+"files/"+filename);
    15. 	    AsposeUtil bean = new AsposeUtil();
    16. //      bean.word2Pdf2("D:\\pdf\\12.docx","D:\\pdf\\12.pdf");
    17. 	    String inpath=loadAddress+"\\"+filename;
    18. 	    String curr="X"+System.currentTimeMillis()+rd.nextInt(1000);
    19. 	    String outPath=loadAddress+"\\"+curr+".pdf";
    20.         bean.word2Pdf2(inpath,outPath);  
    21.         File f = new File(outPath);
    22.         if (f.exists()) {
    23.             byte[] data = null;
    24.             FileInputStream input=null;
    25.             try {
    26.                 input= new FileInputStream(f);
    27.                 data = new byte[input.available()];
    28.                 input.read(data);
    29.                 response.getOutputStream().write(data);
    30.             } catch (Exception e) {
    31.                 System.out.println("pdf文件处理异常：" + e);
    32.             }finally{
    33.                 try {
    34.                     if(input!=null){
    35.                         input.close();
    36.                     }
    37.                 } catch (IOException e) {
    38.                     e.printStackTrace();
    39.                 }
    40.             }
    41.         }
    42. 	}

    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

    1. public String createHanReportDoc(List list,String id,String showname) throws Exception {
    2. 			// 创建数据
    3. 			//Map dataMap = new HashMap();
    4. 			//dataMap =getTaskReportData(dataMap, list);
    5. 			XieWaiDO dataMap = new XieWaiDO();
    6. 			dataMap	=list.get(0);	
    7. 			// 获取模板
    8. 			String mjinfoJson=dataMap.getXwMjInfo();
    9. 			StringBuffer sb=new StringBuffer();
    10. 			List mjInfo = new ArrayList();
    11. 			if(mjinfoJson!=null&&!mjinfoJson.equals("")){
    12. 				JSONArray json=JSONArray.parseArray(mjinfoJson);
    13. 				if(json.size()>0){
    14. 					  for(int i=0;i
    15. 						Map map = new HashMap();
    16. 					    JSONObject job =json.getJSONObject(i);  //
    17. 					    String name=(String) job.get("name");
    18. 					    if(i!=0&&i!=job.size()-1){
    19. 					    	sb.append("、");
    20. 					    }
    21. 					    sb.append(name);
    22. 					  }
    23. 				}
    24. 			dataMap.setXwMjInfo(sb.toString());
    25. 			}
    26. 			Date now=new Date();
    27. 			String nowDate=sdf2.format(now);
    28. 			dataMap.setReceiveTime(nowDate);
    29. 			dataMap.setRemarks(showname);
    30. 			
    31. 			
    32. 			Configuration configuration = new Configuration();
    33. 			configuration.setDefaultEncoding("utf-8");
    34. 			configuration.setDirectoryForTemplateLoading(new File(loadAddress));
    35. 			System.out.println(this.getClass().getResource(""));
    36. 			Template t = null;
    37. 			String tem=sdf3.format(new Date());
    38. 			String tt=id+""+tem;
    39. 			String name = "\\han_"+tt+".docx";
    40. 			String ftl="han.ftl";
    41. 			File file = new File(loadAddress + name);
    42. 			try {
    43. 				t = configuration.getTemplate(ftl);
    44. 				t.setEncoding("UTF-8");
    45. 				Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(loadAddress + name), "UTF-8"));
    46. 				t.process(dataMap, out);
    47. 				out.close();
    48. 			} catch (IOException e) {
    49. 				e.printStackTrace();
    50. 			} catch (TemplateException e) {
    51. 				e.printStackTrace();
    52. 			}
    53. 			return name;
    54. 		}

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  • 原文地址：https://blog.csdn.net/chenqqabcdchenqqabcd/article/details/127651555