问ITextRenderer - HTML转换问题

EN

final TemplateEngine templateEngine;
private final ObjectMapper objectMapper;

//reportAsBytes  will be sent to HTML file
byte[] reportAsBytes = generateReport(
            TEST_TEMPLATE,
            objectMapperWithNullValues.valueToTree(dataForReport)
        );

 public byte[] generateReport(String templateId, JsonNode data) {
        Map<String, Object> dataAsMap = convertDataToMap(data);
        String reportAsHtml = generateReportAsHtml(templateId, dataAsMap, 'en');
        return generatePdfReportAsBytes(reportAsHtml);
    }

 private Map<String, Object> convertDataToMap(JsonNode data) {
        return objectMapper.convertValue(data, new TypeReference<Map<String,Object>>() {});
    }

  private String generateReportAsHtml(String templateId, Map<String, Object> jsonData, Locale reportLocale) {
        Context context = new Context();
        context.setVariable("data", jsonData);
        context.setLocale(reportLocale);
        return templateEngine.process(templateId, context);
    }

  private byte[] generatePdfReportAsBytes(String reportAsHtml) {
        ITextRenderer renderer = createRenderer();
        renderer.setDocumentFromString(reportAsHtml);
        renderer.layout();

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        renderer.createPDF(outputStream);
        return outputStream.toByteArray();
    }