Java实现Word/Excel/TXT转PDF的方法

Z时代
2024-01-10
分类：综合

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


public static boolean getLicense(){
    boolean result = false;
    InputStream is = null;
    try{
      is =UploadFiles.class.getClassLoader().getResourceAsStream("license-excel.xml");
      License aposeLic = new License();
      aposeLic.setLicense(is);
      result = true;
    }catch(Exception e){
      e.printStackTrace();
    }finally{
      try {
        is.close();
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
    return result;
  }

3.2:文本文件转码


/* 将txt 转换编码
  * @param file
  * @author zsqing
 */
public File saveAsUTF8(File file){
    String code = "gbk";
    byte[] head = new byte[3];
    try {
      InputStream inputStream = new FileInputStream(file);
      inputStream.read(head);
      if (head[0] == -1 && head[1] == -2) {
        code = "UTF-16";
      } else if (head[0] == -2 && head[1] == -1) {
        code = "Unicode";
      } else if (head[0] == -17 && head[1] == -69 && head[2] == -65) {
        code = "UTF-8";
      }
      inputStream.close();
      System.out.println(code);
      if (code.equals("UTF-8")) {
        return file;
      }
      String str = FileUtils.readFileToString(file, code);
      FileUtils.writeStringToFile(file, str, "UTF-8");
      System.out.println("转码结束");
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return file;
  }

3.3:word和txt转换pdf


/**
 * 将word txt转换成pdf
 * @param inPath
 * @param outPath
 * @author zsqing
*/
public void wordAndTextToPdf(String inPath, String outPath ,String localIP,HttpServletRequest request)
  {
    String fileToPdfUrl="";
    boolean flag = false;
    File file = null;
    FileOutputStream os = null;
    try
    {
      //long old = System.currentTimeMillis();
      // 新建一个空白文档
      file = new File(outPath);
      file = saveAsUTF8(file);
      os = new FileOutputStream(file);
      // InPath是将要被转化的文档
      com.aspose.words.Document doc = new com.aspose.words.Document(inPath);
      /*
       * 全面支持DOC,DOCX进行OOXML,RTF,HTML,OpenDocument,PDF,EPUB,XPS,SWF间转换
       */
      doc.save(os, SaveFormat.PDF);
      flag = true;
      //long now = System.currentTimeMillis();
      //System.out.println("共耗时：" + ((now - old) / 1000.0) + "秒"); // 转化用时
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    finally
    {
      try
      {
        if (os != null)
        {
          os.close();
        }
      }
      catch (Exception e)
      {
        e.printStackTrace();
      }
      if (!flag)
      {
        file.deleteOnExit();
      }
    }
  }

3.4:Excel转换pdf


/**
 * 将docx转换成pdf
 * @param inPath
 * @param outPath
 * @author zsqing
 */
 public void wordToPdf(String inPath, String outPath ,String localIP,HttpServletRequest request)
  {
    String fileToPdfUrl="";
    boolean flag = false;
    File file = null;
    FileOutputStream os = null;
    try
    {
      //long old = System.currentTimeMillis();
      // 新建一个空白文档
      file = new File(outPath);
      file = saveAsUTF8(file);
      os = new FileOutputStream(file);
      // InPath是将要被转化的文档
      com.aspose.words.Document doc = new com.aspose.words.Document(inPath);
      /*
       * 全面支持DOC,DOCX进行OOXML,RTF,HTML,OpenDocument,PDF,EPUB,XPS,SWF间转换
       */
      doc.save(os, SaveFormat.PDF);
      flag = true;
      //long now = System.currentTimeMillis();
      //System.out.println("共耗时：" + ((now - old) / 1000.0) + "秒"); // 转化用时
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    finally
    {
      try
      {
        if (os != null)
        {
          os.close();
        }
      }
      catch (Exception e)
      {
        e.printStackTrace();
      }
      if (!flag)
      {
        file.deleteOnExit();
      }
    }
  }