Java实现Word/Excel/TXT转PDF的方法

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();
      }
    }
  }

总结

以上所述是小编给大家介绍的java实现word/excel/txt转pdf的方法，希望对大家有所帮助