Download (export) PDF template file (such as approval form), and report error: invalid nested tag * * * found, expected closing tag***

• Preface , Next to the last one （ download （ export ）pdf Template file （ such as ： Approval form ））;
• Error reason ：html Wrong format , End tag missing （ Maybe according to the actual situation , confirm html It's also true , But I still report this mistake ）;
• Solutions ： Get the html Content time , adopt jsoup format html Content ;

1. pom introduce jsoup package

<dependency>
    <groupId>org.jsoup</groupId>
    <artifactId>jsoup</artifactId>
    <version>1.14.3</version>
</dependency>

2. stay java In the code html format

/** *  take html  Transform into strict XHTML */
public class Html2Xhtml {
    

    /** *  Transformation class  * * @param htmlPath html File input path ( With file name ) * @param xhtmlPath xhtml File input path ( With file name ) * @return */
    public static String html2Xhtml(String htmlPath, String xhtmlPath) {
    
        if (StringUtils.isEmpty(htmlPath)) {
    
            return null;
        }

        String path = null;
        try (FileInputStream fin = new FileInputStream(htmlPath)) {
    
            ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
            int data = -1;
            while ((data = fin.read()) != -1) {
    
                byteArrayOut.write(data);
            }
            fin.close();

            String html = byteArrayOut.toString("UTF-8");
            //System.out.println(" original HTML：" + html);

            String newHtml = formatHtml(html);
            //System.out.println(" After the formatting HTML：" + newHtml);

            byte[] htmlFileData = newHtml.getBytes(StandardCharsets.UTF_8);
            byteArrayOut.close();

            ByteArrayInputStream tidyInput = new ByteArrayInputStream(htmlFileData);
            ByteArrayOutputStream tidyOut = new ByteArrayOutputStream();
            Tidy tidy = new Tidy();
            tidy.setInputEncoding("UTF-8");
            tidy.setOutputEncoding("UTF-8");
            tidy.setShowWarnings(false);
            tidy.setIndentContent(true);
            tidy.setSmartIndent(true);
            tidy.setIndentAttributes(false);
            tidy.setMakeClean(true);
            tidy.setQuiet(true);
            tidy.setWord2000(true);
            tidy.setXHTML(true);
            tidy.setErrout(new PrintWriter(System.out));
            tidy.parse(tidyInput, tidyOut);
            tidyInput.close();

            tidyOut.writeTo(new FileOutputStream(xhtmlPath));
            tidyOut.flush();
            tidyOut.close();

            path = xhtmlPath;
        } catch (FileNotFoundException e) {
    
            e.printStackTrace();
        } catch (IOException e) {
    
            e.printStackTrace();
            path = null;
        }

        return path;
    }


    /** *  format html * *  Error code ：Invalid nested tag *** found, expected closing tag *** *  Error reason ：html turn xhtml In the process , The label is not closed  *  Solutions ： adopt jsoup format html * @param html * @return */
    private static String formatHtml(String html) {
    
        Document document = Jsoup.parse(html);
        document.outputSettings().syntax(Document.OutputSettings.Syntax.xml);
        document.outputSettings().escapeMode(Entities.EscapeMode.xhtml);
        return document.html();
    }

}