使用ITextRenderer从HTML生成pdf文件时的编码问题 [英] Encoding issue while generating pdf file from HTML using ITextRenderer
问题描述
我正在使用包含非拉丁字符的ITextRenderer生成一个pdf文档。在我的情况下，这里是保加利亚语。
I am trying to generate a pdf document using ITextRenderer that contains non-latin characters. In my case here is Bulgarian.
在调用ITextRenderer之前，我有一个 String内容，在一些进程（如解析整理） （我可以通过调试看到这个价值）
Before calling ITextRenderer, I have a String content that after some processes (like parsing with tidy) looks like that (I am able to see this value through debugging)
Sting content ：
td class="description">Вид на потока</td>
td class="description">Статус на потока</td>
上面只是我的String的一部分。这个内容包含一个有效的html语法。我只是放在这里的一小部分来澄清，直到这一部分，我的编码是正确的，因为我能够阅读保加利亚字符。
The above is just a part of my String. This content contains a valid html syntax. I just put here a small part of it to clarify that until this part, my encoding is right since I am able to read Bulgarian characters.
之后，以下代码将其创建文档，将其放在 itextrenderer 中，并生成 pdf 文件。因为我能够成功地生成英文版的pdf文件，因此这个代码已经被测试和 的内容。
After that, the following code takes place which creates a document, put it in itextrenderer and generate the pdf file. This code is already tested and working for contents of lating characters since I was able to successfully generate a pdf file for english language.
当我用另一种语言（保加利亚语）切换非拉丁字符时，问题出现。所生成的PDF忽略所有的保密字符，最终结果是一个带有大量空行的pdf。这是生成pdf的代码的一部分
The problem appears when I switch in another language (Bulgarian) with non latin characters. The generated PDF ignores all the bulgarian characters and the final result is a pdf with a lot of empty lines. This is the part of the code that generates the pdf
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setValidating(false);
dbf.setNamespaceAware(false);
dbf.setFeature("http://xml.org/sax/features/namespaces", false);
dbf.setFeature("http://xml.org/sax/features/validation", false);
dbf.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
dbf.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
DocumentBuilder builder = dbf.newDocumentBuilder();
Document doc = builder.parse(new ByteArrayInputStream(content.getBytes("UTF-8")));
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
InputStream is = null;
ITextRenderer renderer = new ITextRenderer();
renderer.getFontResolver().addFont("fonts/TIMES.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
renderer.getFontResolver().addFont("fonts/TIMESBD.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
renderer.getFontResolver().addFont("fonts/TIMESBI.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
renderer.getFontResolver().addFont("fonts/TIMESI.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
renderer.setDocument(doc, null);
renderer.layout();
renderer.createPDF(outputStream);
outputStream.close();
byte[] outputBytes = outputStream.toByteArray();
is = new ByteArrayInputStream(outputBytes);
response.setContentType("application");
response.addHeader("Content-Disposition", "attachment; filename=\"" + "exported.pdf" + "\"");
response.setContentLength(outputBytes.length);
response.getOutputStream().write(inputStreamToBytes(is));
我尝试过几件事情（主要与编码有关），但遗憾的是我还没有找到解决方案。可能我在这里缺少一些明显的东西：）
I have tried several things (mainly related to encoding) but unfortunately I haven't found a solution yet. Probably I am missing something obvious here :)
我不知道这是否添加了任何值，但是我使用spring，而这个代码运行在Controller
I am not sure if this adds any value, but I am using spring and this code runs inside a Controller
任何帮助将不胜感激。
Thanx
推荐答案
您的HTML是否指定UTF-8编码？您的字体文件是否在该路径中找到？
Is your HTML specifying the UTF-8 encoding? Are your font files being found in that path?
查看这个要点说，它可以在Linux上为中文字符提供一个到系统默认字体位置的路径。
Take a look at this gist that says it works for Chinese characters on Linux by providing a path to the default location of fonts in the system.
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