java根据富文本生成pdf文件过程解析

public class PdfUtil {  /*   * 生成pdf工具类   * wmy 12:40 2019/8/9   * @Param [guideBook, pdfPath]   * @return java.lang.Boolean   **/  public static Boolean htmlToPdf(GuideBook guideBook, String pdfPath) {    try {      // 1.新建document      Document document = new Document();      // 2.建立一个书写器(Writer)与document对象关联，通过书写器(Writer)可以将文档写入到磁盘中。      //创建 PdfWriter 对象 第一个参数是对文档对象的引用，第二个参数是文件的实际名称，在该名称中还会给出其输出路径。      PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(pdfPath));      // 3.打开文档      document.open();      //要解析的html      //html转换成普通文字,方法如下:      org.jsoup.nodes.Document contentDoc = Jsoup.parseBodyFragment(getHtml(guideBook.getTitle())+guideBook.getContent());      org.jsoup.nodes.Document.OutputSettings outputSettings = new org.jsoup.nodes.Document.OutputSettings();      outputSettings.syntax(org.jsoup.nodes.Document.OutputSettings.Syntax.xml);      contentDoc.outputSettings(outputSettings);      String parsedHtml = contentDoc.outerHtml();      //这儿的font-family不支持汉字，{font-family:仿宋} 是不可以的。      InputStream cssIs = new ByteArrayInputStream("* {font-family: PingFang-SC-Medium.otf;}".getBytes("UTF-8"));      //第四个参数是html中的css文件的输入流      //第五个参数是字体提供者，使用系统默认支持的字体时，可以不传。      XMLWorkerHelper.getInstance().parseXHtml(writer, document, new ByteArrayInputStream(parsedHtml.getBytes()), cssIs);      // 5.关闭文档      document.close();    } catch (Exception e) {      e.printStackTrace();      return false;    }    return true;  }  /*   * 下载文件   * wmy 9:54 2019/8/12   * @Param [request, response, inputStream, fileName]   * @return void   **/  public static void download(HttpServletRequest request, HttpServletResponse response, InputStream inputStream, String fileName){    BufferedOutputStream bos = null;    try {      // 定义输出缓冲 10k      byte[] buffer = new byte[10240];      //文件名称的处理      // http://127.0.0.1:5002/guide-book/pdf?id=124      fileName = fileName.replaceAll("[//pP//p{Punct}]", "-").replace(" ", "-").replaceAll("[-]+", "-")+".pdf";      String userAgent = request.getHeader("user-agent").toLowerCase();      if (userAgent.contains("msie") || userAgent.contains("like gecko")) {        fileName = URLEncoder.encode(fileName, "UTF-8");      } else {        fileName = new String(fileName.getBytes("UTF-8"), "iso-8859-1");      }      response.setCharacterEncoding("utf-8");      response.setContentType("application/msword");      response.setHeader("Content-Disposition", "attachment; filename=" + fileName);      bos = new BufferedOutputStream(response.getOutputStream());      int bytesRead = 0;      while ((bytesRead = inputStream.read(buffer)) != -1) {        bos.write(buffer, 0, bytesRead);      }    } catch (Exception e) {      e.printStackTrace();    } finally {      if (bos != null) {        try {          bos.close();        } catch (IOException e) {          e.printStackTrace();        }      }    }  }  /*   * 获取html   * wmy 10:39 2019/8/12   * @Param [title]   * @return java.lang.String   **/  public static String getHtml(String title){    return "<h1 align=/"center/">"+title+"</h1>";  }}