我使用iText 7.1.1使用HtmlConverter将html转换为pdf：
ConverterProperties props = new ConverterProperties();
FontProvider fp = new DefaultFontProvider(true, false, false);
for (String font : FONTS) {
FontProgram fontProgram = FontProgramFactory.createFont(font);
fp.addFont(fontProgram);
}
props.setFontProvider(fp);
//HtmlConverter.convertToPdf(htmlBody, outputStream, props);
com.itextpdf.kernel.pdf.PdfWriter writer = new com.itextpdf.kernel.pdf.PdfWriter(outputStream);
PdfDocument pdf = new PdfDocument(writer);
Document document = new Document(pdf);
List<IElement> elements = HtmlConverter.convertToElements(new ByteArrayInputStream(htmlBody.getBytes(StandardCharsets.UTF_8)), props);
for (IElement element : elements) {
document.add((IBlockElement)element);
}
但是对于一些Html Strings，我有以下错误：
java.lang.ClassCastException: com.itextpdf.layout.property.UnitValue cannot be cast to com.itextpdf.layout.property.BorderRadius
html看起来像：
<html>
<head></head>
<body>
<meta charset="utf-8" />
<h2>alarm<br />####</h2>
<div>
<p> </p>
<b>Date: </b>01.01.2018 12:12:12 UTC-00:00
<br />
<b>From: </b>Google <no-reply@accounts.google.com>
<br />
<b>To: </b>mmm@mydomain.com
<br />
<p>#####</p>
</div>
<meta name="format-detection" content="date=no" />
<meta name="format-detection" content="email=no" />
<style>.awl a {color: #FFFFFF; text-decoration: none;}.abml a {color: #000000; font-family: Roboto-Medium,Helvetica,Arial,sans-serif; font-weight: bold; text-decoration: none;}.afal a {color: #b0b0b0; text-decoration: none;}@media screen and (min-width: 600px) {.v2sp {padding: 6px 30px 0px;} .v2rsp {padding: 0px 10px;}}</style>
<table width="100%" height="100%" style="min-width: 348px;" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr height="32px"></tr>
<tr align="center">
<td>
<table border="0" cellspacing="0" cellpadding="0" style="padding-bottom: 20px; max-width: 600px; min-width: 220px;">
<tbody>
<tr>
<td>
<table cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td></td>
<td>
<table width="100%" border="0" cellspacing="0" cellpadding="0" style="direction: ltr; padding-bottom: 7px;">
<tbody>
<tr>
<td align="left"><img width="92" height="32" src="https://www.gstatic.com/accountalerts/email/googlelogo_color_188x64dp.png" style="width: 92px; height: 32px;" /></td>
<td align="right" style="font-family: Roboto-Light,Helvetica,Arial,sans-serif;">my Name</td>
<td align="right" width="35"><img width="28" height="28" style="width: 28px; height: 28px; border-radius: 50%;;" src="https://www.gstatic.com/accountalerts/email/anonymous_profile_photo.png" /></td>
</tr>
</tbody>
</table></td>
<td></td>
</tr>
<tr>
<td style="background:url('https://www.gstatic.com/accountalerts/email/hodor/4-corner-nw.png') top left no-repeat;" width="6" height="5">
<!--[if gte mso 9]><v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width:6px; height: 5px;"><v:fill type="tile" src="https://www.gstatic.com/accountalerts/email/hodor/4-corner-nw.png" color="#ffffff" /><v:textbox style="mso-fit-shape-to-text:true" inset="0,0,0,0"><![endif]-->
<div></div>
<!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td>
<td style="background:url('https://www.gstatic.com/accountalerts/email/hodor/4-pixel-n.png') top center repeat-x;" height="5">
<!--[if gte mso 9]><v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="height: 5px;"><v:fill type="tile" src="https://www.gstatic.com/accountalerts/email/hodor/4-pixel-n.png" color="#ffffff" /><v:textbox style="mso-fit-shape-to-text:true" inset="0,0,0,0"><![endif]-->
<div></div>
<!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td>
<td style="background:url('https://www.gstatic.com/accountalerts/email/hodor/4-corner-ne.png') top right no-repeat;" width="6" height="5">
<!--[if gte mso 9]><v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width: 6px; height: 39px;"><v:fill type="tile" src="https://www.gstatic.com/accountalerts/email/hodor/4-corner-ne.png" color="#ffffff" /><v:textbox style="mso-fit-shape-to-text:true" inset="0,0,0,0"><![endif]-->
<div></div>
<!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td>
</tr>
<tr>
<td style="background:url('https://www.gstatic.com/accountalerts/email/hodor/4-pixel-w.png') center left repeat-y;" width="6">
<!--[if gte mso 9]><v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width: 6px;"><v:fill type="tile" src="https://www.gstatic.com/accountalerts/email/hodor/4-pixel-w.png" color="#ffffff" /><v:textbox style="mso-fit-shape-to-text:true" inset="0,0,0,0"><![endif]-->
<div></div>
<!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td>
<td>
<div style="font-family: Roboto-Regular,Helvetica,Arial,sans-serif;padding-left: 20px; padding-right: 20px;border-bottom: thin solid #f0f0f0; color: rgba(0,0,0,0.87); font-size: 24px;padding-bottom: 38px;padding-top: 40px;text-align: center; word-break: break-word;">
<div class="v2sp">
Neues Gerät angemeldet
<br />
<a style="font-family: Roboto-Regular,Helvetica,Arial,sans-serif;color: rgba(0,0,0,0.87); font-size: 16px; line-height: 1.8;">mmm@mydomain.com</a>
</div>
</div>
<div style="font-family: Roboto-Regular,Helvetica,Arial,sans-serif; font-size: 13px; color: rgba(0,0,0,0.87); line-height: 1.6;padding-left: 20px; padding-right: 20px;padding-bottom: 32px; padding-top: 24px;">
<div class="v2sp">
Jemand hat sich über ein neues Gerät in Ihrem Google-Konto angemeldet.
<div style="padding-top: 24px; text-align: center;">
<a href="https://www.google.com" target="_blank" style="display:inline-block; text-decoration: none;">
<table border="0" cellspacing="0" cellpadding="0" style="background-color: #4184F3; border-radius: 2px; min-width: 90px;">
<tbody>
<tr style="height: 6px;"></tr>
<tr>
<td style="padding-left: 8px; padding-right: 8px; text-align: center;"><a href="https://www.google.com" target="_blank" style="font-family: Roboto-Regular,Helvetica,Arial,sans-serif; color: #ffffff; font-weight: 400; line-height: 20px; text-decoration: none;font-size: 13px;">AKTIVITÄT PRÜFEN</a></td>
</tr>
<tr style="height: 6px;"></tr>
</tbody>
</table></a>
</div>
</div>
</div></td>
<td style="background:url('https://www.gstatic.com/accountalerts/email/hodor/4-pixel-e.png') center left repeat-y;" width="6">
<!--[if gte mso 9]><v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width: 6px;"><v:fill type="tile" src="https://www.gstatic.com/accountalerts/email/hodor/4-pixel-e.png" color="#ffffff" /><v:textbox style="mso-fit-shape-to-text:true" inset="0,0,0,0"><![endif]-->
<div></div>
<!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td>
</tr>
<tr>
<td style="background:url('https://www.gstatic.com/accountalerts/email/hodor/4-corner-sw.png') top left no-repeat;" width="6" height="5">
<!--[if gte mso 9]><v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width: 6px;"><v:fill type="tile" src="https://www.gstatic.com/accountalerts/email/hodor/4-corner-sw.png" color="#ffffff" /><v:textbox style="mso-fit-shape-to-text:true" inset="0,0,0,0"><![endif]-->
<div></div>
<!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td>
<td style="background:url('https://www.gstatic.com/accountalerts/email/hodor/4-pixel-s.png') top center repeat-x" height="5">
<!--[if gte mso 9]><v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width: 6px;"><v:fill type="tile" src="https://www.gstatic.com/accountalerts/email/hodor/4-pixel-s.png" color="#ffffff" /><v:textbox style="mso-fit-shape-to-text:true" inset="0,0,0,0"><![endif]-->
<div></div>
<!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td>
<td style="background:url('https://www.gstatic.com/accountalerts/email/hodor/4-corner-se.png') top left no-repeat;" width="6" height="5">
<!--[if gte mso 9]><v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width: 6px;"><v:fill type="tile" src="https://www.gstatic.com/accountalerts/email/hodor/4-corner-se.png" color="#ffffff" /><v:textbox style="mso-fit-shape-to-text:true" inset="0,0,0,0"><![endif]-->
<div></div>
<!--[if gte mso 9]></v:textbox></v:rect><![endif]--></td>
</tr>
<tr>
<td></td>
<td>
<div style="text-align: left;">
<div style="font-family: Roboto-Regular,Helvetica,Arial,sans-serif;color: rgba(0,0,0,0.54); font-size: 12px; line-height: 20px; padding-top: 10px;">
<div>
Wir haben Ihnen diese E-Mail gesendet, um Sie über wichtige Änderungen zu Ihrem Google-Konto und den Diensten von Google zu informieren.
</div>
<div style="direction: ltr;">
© 2018 Google Inc.,
<a class="afal" style="font-family: Roboto-Regular,Helvetica,Arial,sans-serif;color: rgba(0,0,0,0.54); font-size: 12px; line-height: 20px; padding-top: 10px;">1600 Amphitheatre Parkway, Mountain View, CA 94043, USA</a>
</div>
</div>
<div style="display: none !important; mso-hide:all; max-height:0px; max-width:0px;">
et:31
</div>
</div></td>
<td></td>
</tr>
</tbody>
</table></td>
</tr>
</tbody>
</table></td>
</tr>
<tr height="32px"></tr>
</tbody>
</table>
</body>
</html>
如何解决这些castExeption问题？
答案 0 :(得分：2)
我已经能够重现这个问题，但是有一个简单的解决方法，因为它本质上是一个依赖问题。
如果您将依赖项更新为html2pdf的最新版本2.0.1，那么您的工作流程应该会成功。
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>html2pdf</artifactId>
<version>2.0.1</version>
</dependency>
仅供参考我是iText的员工，我会确保记录这种不兼容性。