我使用openhtmltopdf库将我的html模板转换为PDF:
try (OutputStream os = new FileOutputStream(filePath);
PDDocument doc = new PDDocument()) {
for (String html : htmlPagesWithValues) {
PdfRendererBuilder builder = new PdfRendererBuilder();
builder.defaultTextDirection(BaseRendererBuilder.TextDirection.LTR);
builder.useDefaultPageSize(210, 297, BaseRendererBuilder.PageSizeUnits.MM);
builder.useProtocolsStreamImplementation(new InternalFSStreamFactory(), "localProtocol");
builder.withHtmlContent(html, "");
builder.useSVGDrawer(new BatikSVGDrawer());
builder.usePDDocument(doc);
PdfBoxRenderer renderer = builder.buildPdfRenderer();
renderer.createPDFWithoutClosing();
}
doc.save(os);
} catch (Exception ex) {
log.debug("Stacktrace: ", ex);
}
在生成PDF文件期间,我得到以下堆栈跟踪:
java.lang.NullPointerException:null com.openhtmltopdf.pdfboxout.PdfBoxTextRenderer.getWidth(PdfBoxTextRenderer.java:300)at com.openhtmltopdf.layout.Breaker.doBreakText(Breaker.java:147)at com.openhtmltopdf.layout.Breaker。 doBreakText(Breaker.java:115)at com.openhtmltopdf.layout.Breaker.breakText(Breaker.java:109)at com.openhtmltopdf.layout.InlineBoxing.layoutText(InlineBoxing.java:959)
...
我发现了这个问题。我在托管在我们服务器上的PDF文件上使用图像。 Openpdftohtml库试图通过我们的公共URL访问图像,但此URL不可用。添加访问权限后,PDF已成功创建。我也在Github上打开了这个问题:https://github.com/danfickle/openhtmltopdf/issues/267