Java实现Word/Excel/TXT转PDF

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

 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!