Java

class Persons
{
    public String firstName;
    public String secondName;
    public String CNP;
    public String Email;

};

class NODE
{
    private NODE next;
    public Persons box = new Persons();
    public NODE(String firstName, String secondName, String CNP, String Email)
    {
        box.firstName = firstName;
        box.secondName = secondName;
        box.CNP = CNP;
        box.Email = Email;
    }
    public NODE GetNext()
    {
        return next;
    }
    public void SetNext(NODE next)
    {
        this.next = next;
    }
};

class SinglyLinkedList
{
    private NODE head;
    public SinglyLinkedList()
    {
        head = null;
    }
    public boolean isEmpty()
    {
        return head == null;
    }
    public void AddNODE(NODE newNode)
    {
        NODE temp = null;
        if (isEmpty())
            head = temp = newNode;
        else
        {
            temp.SetNext(newNode);
            temp = newNode;
        }
        temp.SetNext(null);
    }
    public void Print()
    {
        NODE temp = head;
        while (temp != null)
        {
            System.out.print("\n First Name   : " + temp.box.firstName);
            System.out.print("\n Second Name  : " + temp.box.secondName);
            System.out.print("\n CNP          : " + temp.box.CNP);
            System.out.print("\n Email        : " + temp.box.Email);
            temp = temp.GetNext();
            System.out.print("\n");
        }
    }
};

public class MyClass
{
    public static void main(String args[])
    {
        SinglyLinkedList ptr = new SinglyLinkedList();

        NODE obj1 = new NODE("Dragu", "Stelian", "1811226284570", "dragu_stelian@yahoo.com");
        NODE obj2 = new NODE("Popescu", "Mircea", "1891226284462", "popescu.mircea@yahoo.com");
        
        ptr.AddNODE(obj1);
        ptr.AddNODE(obj2);

        ptr.Print();
    }
}

ByteArrayOutputStream baos = null;
      DataRequestVO dataRequest = null;
      WordprocessingMLPackage wordMLPackageMain = null;
      try {
         dataRequest = reportDAO.fetchDocketData(dataRequestNO);

         String templateFile = dataRequest.getReportType().getTemplatePath();
         String fileName = dataRequest.getDocketNo() + " - " + dataRequest.getDataRequestNo() + "-" + dataRequest.getReportType().getReportName();

         URL url = this.getClass().getClassLoader().getResource(templateFile);

         String templateFilePath = url.toURI().getPath();
         WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(new File(url.toURI().getPath()));

         ContentTypeManager ctm = wordMLPackage.getContentTypeManager();

         CTOverride override = ctm.getOverrideContentType().get(new URI("/word/document.xml"));
         if (templateFilePath.endsWith("dotm")) {
            override.setContentType(
                  org.docx4j.openpackaging.contenttype.ContentTypes.WORDPROCESSINGML_DOCUMENT_MACROENABLED);
         } else {
            override.setContentType(org.docx4j.openpackaging.contenttype.ContentTypes.WORDPROCESSINGML_DOCUMENT);
         }

         // Now save it
         DocketReportHelper.prepare(wordMLPackage);

         List<Object> texts = DocketReportHelper.getAllElementFromObject(wordMLPackage.getMainDocumentPart(),
               Text.class);

         DocketReportHelper.replacePlaceholder(texts, dataRequest.getDocketNo(), PLACEHOLDER_DOCKET_NO);
         
         DocketReportHelper.replacePlaceholder(texts, dataRequest.getQuestion(), PLACEHOLDER_QUESTION); //html code text
         DocketReportHelper.replacePlaceholder(texts, dataRequest.getResponse(), PLACEHOLDER_RESPONSE); //html code text
         

         // Confidential Reports
         if ("yes".equalsIgnoreCase(dataRequest.getConfidential())) {

            // Get Confidential Header Footer template
            wordMLPackageMain = createConfHeaderFooter();
            List<Object> listParamMain = wordMLPackage.getMainDocumentPart().getContent();
            for (Object param : listParamMain) {
               if (param instanceof P) {
                  wordMLPackageMain.getMainDocumentPart().addObject((P) param);
               } else if(param instanceof JAXBElement) {
                  wordMLPackageMain.getMainDocumentPart().addObject((JAXBElement) param);
               }
            }
         } else {
            wordMLPackageMain = wordMLPackage;
         }


         baos = new ByteArrayOutputStream();
         SaveToZipFile saver = new SaveToZipFile(wordMLPackageMain);
         saver.save(baos);

static void replacePlaceholder(List<Object> texts, String name, String placeholder) {
      log.debug("placeholder : " + placeholder);
      for (Object text : texts) {
         Text textElement = (Text) text;
         if (textElement != null && placeholder.equals(textElement.getValue())) {
            textElement.setValue(name);
            break;
         }
      }
   }

public static void prepare(WordprocessingMLPackage wmlPackage) throws Exception {
      // Apply the filter
      WordprocessingMLPackage.FilterSettings filterSettings = new WordprocessingMLPackage.FilterSettings();
      filterSettings.setRemoveProofErrors(true);
      filterSettings.setRemoveContentControls(true);
      filterSettings.setRemoveRsids(true);
      wmlPackage.filter(filterSettings);

      log.debug(XmlUtils.marshaltoString(wmlPackage.getMainDocumentPart().getJaxbElement(), true, true));

      // Now clean up some more
      org.docx4j.wml.Document wmlDocumentEl = wmlPackage.getMainDocumentPart().getJaxbElement();
      Body body = wmlDocumentEl.getBody();

      SingleTraversalUtilVisitorCallback paragraphVisitor = new SingleTraversalUtilVisitorCallback(
            new TraversalUtilParagraphVisitor());
      paragraphVisitor.walkJAXBElements(body);

      log.debug(XmlUtils.marshaltoString(wmlPackage.getMainDocumentPart().getJaxbElement(), true, true));
   }

I want to find a way to convert Microsoft's word to PDF on linux. My idea is to read each word, picture, or table first, and then write their structure into the PDF document. But when I read the format of the document and write it to PDF, only the pictures can be written and the styles are completely different from those in the document. I would like to ask a kind person if you have any experience in this field. Please give me some advice or guidance. Thank you!