How to convert multiple html string to multiple pdf using openhtmltopdf library

Question

I have a Hashmap as a source of data and I'm generating a separate pdf for each key. But when the hashmap length is greater than 2 I'm getting only the 2nd pdf. 2nd one overrides the 1st pdf.(I'm storing HTML in the body key as you can see in the code). I don't want to create separate HTML files and store them in sever.Is there any way where I can store the HTML and generate separate pdf for all keys in hashmap

    public byte[] BulkPdf(Map jsonObject) throws ApplicationException, IOException {
        LinkedHashMap<String, List<Map<String, Object>>> hashMapDept = new LinkedHashMap<>();
         byte[] reportByte = null;
      
        if (!hashMapDept.isEmpty()) {
            Integer count = 0;
            for (Entry<String, List<Map<String, Object>>> entry : hashMapDept.
                    entrySet()) {
               
               String body = "";
               Writer out = new StringWriter();
              Configuration cfg = new Configuration();
                try {
                   
       cfg.setObjectWrapper(new DefaultObjectWrapper());
         String templateStr = UUID.randomUUID().
                    toString().
                    replaceAll("-",
                            "");
            logger.debug("templatename --> ",
                    templateStr);
            freemarker.template.Template freemarkerTemplate = new freemarker.template.Template(
                    templateStr,
                    new StringReader(html),
                    cfg);

                freemarkerTemplate.process(jsonObject,
                    out);
            body = out.toString();
                } catch (TemplateException | IOException | ApplicationException e) {
                   logger.debug("template pdf exception --> ",
                    e.getMessage());
                    out.flush();
                    e.printStackTrace();
                    cfg.clearTemplateCache();
                } finally {
                    out.flush();
                    cfg.clearTemplateCache();
                }

try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
            PdfRendererBuilder builder = new PdfRendererBuilder();
            builder.withHtmlContent(body,
                    "pathforpdf");
            builder.useFastMode();
            builder.toStream(outputStream);
            builder.run();
            reportByte = outputStream.toByteArray();
            outputStream.close();
            
        } catch (IOException e) {
            e.printStackTrace();
        }
              
            }
        }

        return reportByte;
    }