飞碟，胸腺和春天 [英] Flying saucer, Thymeleaf and Spring
问题描述
我有一个Spring应用程序，需要构建对PDF生成的支持.我正在考虑将飞碟与Thymeleaf一起使用以呈现PDF.但是，我找不到与Thymeleaf一起使用Flying-saucer的太多信息.还有其他人一起使用这些技术吗?
I have a Spring application and need to build support for PDF generation. I'm thinking of using Flying-saucer together with Thymeleaf to render the PDF. However, I cannot find that much information about using Flying-saucer together with Thymeleaf. Have anyone else used those to technologies together?
推荐答案
我正在将Flyingsaucer-R8与Thymeleaf 2.0.14结合使用时没有问题(而且我确信Thymeleaf的当前版本也可以使用).
I'm using Flyingsaucer-R8 with Thymeleaf 2.0.14 without problems (and I'm sure current version of Thymeleaf works as well).
我为此类配置了单独的TemplateEngine和类路径模板解析器.用它产生XHTML作为String.然后Flyingsaucer从结果创建PDF文档.查看下面的示例.
I have separate TemplateEngine with classpath template resolver configured for this purpose. Using it to produce XHTML as String. Flyingsaucer creates PDF document from result then. Check example below.
下面的代码为示例-不生产的现成代码与没有保修一起使用.为了清楚起见，没有try-catch处理，也没有资源缓存(创建PDF是相当昂贵的操作).考虑一下.
Code below is example - NOT PRODUCTION ready code use it with NO WARRANTY. For sake of clarity there's no try-catch handling and no resources caching (creating PDF is quite expensive operation). Consider that.
代码
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.springframework.core.io.ClassPathResource;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
import org.xhtmlrenderer.pdf.ITextFontResolver;
import org.xhtmlrenderer.pdf.ITextRenderer;
import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.BaseFont;
import com.sun.xml.internal.messaging.saaj.util.ByteOutputStream;
public class FlyingSoucerTestService {
public void test() throws DocumentException, IOException {
ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
templateResolver.setPrefix("META-INF/pdfTemplates/");
templateResolver.setSuffix(".html");
templateResolver.setTemplateMode("XHTML");
templateResolver.setCharacterEncoding("UTF-8");
TemplateEngine templateEngine = new TemplateEngine();
templateEngine.setTemplateResolver(templateResolver);
Context ctx = new Context();
ctx.setVariable("message", "I don't want to live on this planet anymore");
String htmlContent = templateEngine.process("messageTpl", ctx);
ByteOutputStream os = new ByteOutputStream();
ITextRenderer renderer = new ITextRenderer();
ITextFontResolver fontResolver = renderer.getFontResolver();
ClassPathResource regular = new ClassPathResource("/META-INF/fonts/LiberationSerif-Regular.ttf");
fontResolver.addFont(regular.getURL().toString(), BaseFont.IDENTITY_H, true);
renderer.setDocumentFromString(htmlContent);
renderer.layout();
renderer.createPDF(os);
byte[] pdfAsBytes = os.getBytes();
os.close();
FileOutputStream fos = new FileOutputStream(new File("/tmp/message.pdf"));
fos.write(pdfAsBytes);
fos.close();
}
}
模板
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-spring3-4.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<style>
div.border {
border: solid;
border-width: 1px 1px 0px 1px;
padding: 5px 20px 5px 20px;
}
</style>
</head>
<body style="font-family: Liberation Serif;">
<div class="border">
<h1 th:text="${message}">message</h1>
</div>
</body>
</html>
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