引言:
前段时间公司做的教育系统,系统需要实时记录用户学习课程的情况和时间,所以对一些除视频课程之外,对一些文本文档型课件同样如此,初次的方案是讲office相关类型的文件进行转换Html文件,然后展示对应的html文件,PC端差不多没问题了,但是个别文件再转换html之后,样式出现了错乱,即时做了编码转换处理,但是还是有个别乱码,最后改变方案,最后统一将文件转为pdf,然后通过流的方式在前端展示,其中包括Word Excel PPT TXT PDF等文件,代码如下:
备注:本来是可以直接展示pdf的,但是Andior上pdf展示不了,最后统一就用IO流的方式进行读取展示了.
1：添加maven依赖
<!--excel word txt ppt转pdf依赖--> <dependency> <groupId>aspose</groupId> <artifactId>pdf</artifactId> <version>11.5.0</version> </dependency> <dependency> <groupId>aspose</groupId> <artifactId>words</artifactId> <version>16.4.0</version> </dependency> <dependency> <groupId>aspose</groupId> <artifactId>cell</artifactId> <version>8.9.2</version> </dependency> <dependency> <groupId>aspose</groupId> <artifactId>pdf</artifactId> <version>11.5.0</version> </dependency>
2:添加license-excel.xml文件(Resource文件夹下)
<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>
3:代码如下:
3.1获取License文件
1 public static boolean getLicense(){ 2 boolean result = false; 3 InputStream is = null; 4 try{ 5 6 is =UploadFiles.class.getClassLoader().getResourceAsStream("license-excel.xml"); 7 License aposeLic = new License(); 8 aposeLic.setLicense(is); 9 result = true; 10 }catch(Exception e){ 11 e.printStackTrace(); 12 }finally{ 13 try { 14 is.close(); 15 } catch (IOException e) { 16 // TODO Auto-generated catch block 17 e.printStackTrace(); 18 } 19 } 20 return result; 21 }
3.2:文本文件转码
1 /* 将txt 转换编码 2 * @param file 3 * @author zsqing 4 */ 5 public File saveAsUTF8(File file){ 6 String code = "gbk"; 7 byte[] head = new byte[3]; 8 try { 9 InputStream inputStream = new FileInputStream(file); 10 inputStream.read(head); 11 if (head[0] == -1 && head[1] == -2) { 12 code = "UTF-16"; 13 } else if (head[0] == -2 && head[1] == -1) { 14 code = "Unicode"; 15 } else if (head[0] == -17 && head[1] == -69 && head[2] == -65) { 16 code = "UTF-8"; 17 } 18 inputStream.close(); 19 20 System.out.println(code); 21 if (code.equals("UTF-8")) { 22 return file; 23 } 24 String str = FileUtils.readFileToString(file, code); 25 FileUtils.writeStringToFile(file, str, "UTF-8"); 26 System.out.println("转码结束"); 27 } catch (FileNotFoundException e) { 28 e.printStackTrace(); 29 } catch (IOException e) { 30 e.printStackTrace(); 31 } 32 33 return file; 34 }
3.3:word和txt转换pdf
1 /** 2 * 将word txt转换成pdf 3 * @param inPath 4 * @param outPath 5 * @author zsqing 6 */ 7 public void wordAndTextToPdf(String inPath, String outPath ,String localIP,HttpServletRequest request) 8 { 9 String fileToPdfUrl=""; 10 boolean flag = false; 11 File file = null; 12 FileOutputStream os = null; 13 try 14 { 15 //long old = System.currentTimeMillis(); 16 // 新建一个空白文档 17 file = new File(outPath); 18 file = saveAsUTF8(file); 19 os = new FileOutputStream(file); 20 // InPath是将要被转化的文档 21 com.aspose.words.Document doc = new com.aspose.words.Document(inPath); 22 /* 23 * 全面支持DOC,DOCX进行OOXML,RTF,HTML,OpenDocument,PDF,EPUB,XPS,SWF间转换 24 */ 25 doc.save(os, SaveFormat.PDF); 26 flag = true; 27 //long now = System.currentTimeMillis(); 28 //System.out.println("共耗时：" + ((now - old) / 1000.0) + "秒"); // 转化用时 29 30 } 31 catch (Exception e) 32 { 33 e.printStackTrace(); 34 } 35 finally 36 { 37 try 38 { 39 if (os != null) 40 { 41 os.close(); 42 } 43 } 44 catch (Exception e) 45 { 46 e.printStackTrace(); 47 } 48 if (!flag) 49 { 50 file.deleteOnExit(); 51 } 52 } 53 }
3.4:Excel转换pdf
1 /** 2 * 将docx转换成pdf 3 * @param inPath 4 * @param outPath 5 * @author zsqing 6 */ 7 public void wordToPdf(String inPath, String outPath ,String localIP,HttpServletRequest request) 8 { 9 String fileToPdfUrl=""; 10 boolean flag = false; 11 File file = null; 12 FileOutputStream os = null; 13 try 14 { 15 //long old = System.currentTimeMillis(); 16 // 新建一个空白文档 17 file = new File(outPath); 18 file = saveAsUTF8(file); 19 os = new FileOutputStream(file); 20 // InPath是将要被转化的文档 21 com.aspose.words.Document doc = new com.aspose.words.Document(inPath); 22 /* 23 * 全面支持DOC,DOCX进行OOXML,RTF,HTML,OpenDocument,PDF,EPUB,XPS,SWF间转换 24 */ 25 doc.save(os, SaveFormat.PDF); 26 flag = true; 27 //long now = System.currentTimeMillis(); 28 //System.out.println("共耗时：" + ((now - old) / 1000.0) + "秒"); // 转化用时 29 30 } 31 catch (Exception e) 32 { 33 e.printStackTrace(); 34 } 35 finally 36 { 37 try 38 { 39 if (os != null) 40 { 41 os.close(); 42 } 43 } 44 catch (Exception e) 45 { 46 e.printStackTrace(); 47 } 48 if (!flag) 49 { 50 file.deleteOnExit(); 51 } 52 } 53 }
最近工作有些忙写的就少了,2020年第一篇与大家分享,一起学习,共同成长!