Apache POI HWPF - 将 doc 文件转换为 pdf 的问题 [英] Apache POI HWPF - problem in convert doc file to pdf

问题描述

我目前正在使用 apache poi 进行 Java 项目.现在在我的项目中，我想将 doc 文件转换为 pdf 文件.转换成功完成，但我只得到 pdf 文本，而不是任何文本样式或文本颜色.我的 pdf 文件看起来像一个黑色的 &白色的.虽然我的文档文件是彩色的并且具有不同的文本样式.

这是我的代码，

 POIFSFileSystem fs = null;文档文档 = 新文档();尝试 {System.out.println("开始测试");fs = new POIFSFileSystem(new FileInputStream("/document/test2.doc"));HWPFDocument doc = 新的 HWPFDocument(fs);WordExtractor we = new WordExtractor(doc);OutputStream file = new FileOutputStream(new File("/document/test.pdf"));PdfWriter writer = PdfWriter.getInstance(document, file);范围范围 = doc.getRange();文档.open();writer.setPageEmpty(true);文档.newPage();writer.setPageEmpty(true);String[] 段落 = we.getParagraphText();for (int i = 0; i 

请帮帮我.

提前谢谢.

解决方案

如果您查看 Apache Tika，这里有一个很好的示例，可以从 HWPF 文档中读取一些样式信息.Tika 中的代码根据 HWPF 内容生成 HTML，但您应该会发现非常相似的内容适用于您的情况.

Tika 类是https://svn.apache.org/repos/asf/tika/trunk/tika-parsers/src/main/java/org/apache/tika/parser/microsoft/WordExtractor.java

关于 Word 文档需要注意的一点是，任何 Character Run 中的所有内容都应用了相同的格式.因此，一个段落由一个或多个字符运行组成.一些样式应用于段落，其他部分在运行中完成.根据您感兴趣的格式，它可能在段落或运行中.

I am currently working Java project with use of apache poi. Now in my project I want to convert doc file to pdf file. The conversion done successfully but I only get text in pdf not any text style or text colour. My pdf file looks like a black & white. While my doc file is coloured and have different style of text.

This is my code,

 POIFSFileSystem fs = null;  
 Document document = new Document(); 

 try {  
     System.out.println("Starting the test");  
     fs = new POIFSFileSystem(new FileInputStream("/document/test2.doc"));  

     HWPFDocument doc = new HWPFDocument(fs);  
     WordExtractor we = new WordExtractor(doc);  

     OutputStream file = new FileOutputStream(new File("/document/test.pdf")); 

     PdfWriter writer = PdfWriter.getInstance(document, file);  

     Range range = doc.getRange();
     document.open();  
     writer.setPageEmpty(true);  
     document.newPage();  
     writer.setPageEmpty(true);  

     String[] paragraphs = we.getParagraphText();  
     for (int i = 0; i < paragraphs.length; i++) {  

         org.apache.poi.hwpf.usermodel.Paragraph pr = range.getParagraph(i);
        // CharacterRun run = pr.getCharacterRun(i);
        // run.setBold(true);
        // run.setCapitalized(true);
        // run.setItalic(true);
         paragraphs[i] = paragraphs[i].replaceAll("\\cM?\r?\n", "");  
     System.out.println("Length:" + paragraphs[i].length());  
     System.out.println("Paragraph" + i + ": " + paragraphs[i].toString());  

     // add the paragraph to the document  
     document.add(new Paragraph(paragraphs[i]));  
     }  

     System.out.println("Document testing completed");  
 } catch (Exception e) {  
     System.out.println("Exception during test");  
     e.printStackTrace();  
 } finally {  
                 // close the document  
    document.close();  
             }  
 }  

please help me.

Thnx in advance.

解决方案

If you look at Apache Tika, there's a good example of reading some style information from a HWPF document. The code in Tika generates HTML based on the HWPF contents, but you should find that something very similar works for your case.

The Tika class is https://svn.apache.org/repos/asf/tika/trunk/tika-parsers/src/main/java/org/apache/tika/parser/microsoft/WordExtractor.java

One thing to note about word documents is that everything in any one Character Run has the same formatting applied to it. A Paragraph is therefore made up of one or more Character Runs. Some styling is applied to a Paragraph, and other parts are done on the runs. Depending on what formatting interests you, it may therefore be on the paragraph or the run.

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