xml + xslt => html => pdf-优快云博客

本文介绍了一种将XML文件通过XSLT转换成HTML的方法，并进一步利用Flying Saucer工具将其转化为PDF格式。此过程涉及XML样式表的设计及如何正确设置CSS以确保最终PDF文档的质量。

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继上一篇:使用java将xml格式化,本blog主要描述如何通过xslt将xml渲染为html(包含CSS),然后再

将html转为pdf.

如果你想了解更多xslt信息，请点击链接xslt。本程序直接使用javax.xml.transform.Transformer将howto.xsl通过数据源howto.xml渲染并保存为howto.html，然后通过第三方开源软件http://code.google.com/p/flying-saucer/将生成的XHTML转换为pdf.(注意:任何标签都必须闭合,否则flying-Saucer做XML解析会报错)

主要代码如下(程序已经上传):

howto.xml:

<?xml version="1.0"?>
<products>
   <product href="http://www.playfield.com/text">
      <name>Playfield Text</name>
      <price currency="usd">299</price>
      <description>Faster than the competition.</description>
      <version>1.0</version>
   </product>
   <product href="http://www.playfield.com/virus">
      <name>Playfield Virus</name>
      <price currency="eur">199</price>
      <description>
         Protect yourself against malicious code.
      </description>
      <version>5.0</version>
   </product>
   <product href="http://www.playfield.com/calc">
      <name>Playfield Calc</name>
      <price currency="usd">299</price>
      <description>Clear picture on your data.</description>
      <version>1.5</version>
   </product>
   <product href="http://www.playfield.com/db">
      <name>Playfield DB</name>
      <price currency="cad">599</price>
      <description>Organize your data.</description>
   </product>
</products>

howto.xsl:

<?xml version="1.0"?>
<xsl:stylesheet version="2.0" xmlns:htm="http://www.w3.org/1999/xhtml" 
        xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" omit-xml-declaration="yes"/>   
<xsl:template match="/products">  
	<html ang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">
      <head>
         <title>Cascading Style Sheet</title>
         <link rel="stylesheet" type="text/css" href="table.css" title="Style"/>
      </head>
      <body>
        <table>
          <tr class="header">
             <td>Name</td>
             <td>Price</td>
             <td>Description</td>
          </tr>
          <xsl:apply-templates/>
        </table>
      </body>
   </html>
</xsl:template>

<xsl:template match="product[position() mod 2 = 1]">
   <tr class="odd">
      <td><xsl:value-of select="name"/></td>
      <td><xsl:value-of select="price"/></td>
      <td><xsl:value-of select="description"/></td>
   </tr>
</xsl:template>

<xsl:template match="product">
   <tr class="even">
      <td><xsl:value-of select="name"/></td>
      <td><xsl:value-of select="price"/></td>
      <td><xsl:value-of select="description"/></td>
   </tr>
</xsl:template>

</xsl:stylesheet>

table.css:

.header { background-color: #999999; font-weight: bold; }
.odd { background-color: normal; }
.even { background-color: #dfdfdf; }

package sunflowerbbs.com;

import javax.xml.transform.*;

import org.xhtmlrenderer.pdf.ITextFontResolver;
import org.xhtmlrenderer.pdf.ITextRenderer;

import java.io.*;

public class HowToXSLT {
	public static void main(String[] args) throws Exception{
		try {

			TransformerFactory tFactory = TransformerFactory.newInstance();

			Transformer transformer = tFactory
					.newTransformer(new javax.xml.transform.stream.StreamSource(
							"howto.xsl"));

			transformer.transform(new javax.xml.transform.stream.StreamSource(
					"howto.xml"), new javax.xml.transform.stream.StreamResult(
					new FileOutputStream("howto.html")));
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		convertHtmlToPdf("howto.html","product.pdf");
		
	}

	public static boolean convertHtmlToPdf(String inputFile, String outputFile)
			throws Exception {

		OutputStream os = new FileOutputStream(outputFile);
		ITextRenderer renderer = new ITextRenderer();
		String url = new File(inputFile).toURI().toURL().toString();

		renderer.setDocument(url);

		// 解决中文支持问题
		// ITextFontResolver fontResolver = renderer.getFontResolver();
		// fontResolver.addFont("C:/Windows/Fonts/SIMSUN.TTC",
		// BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
		// 解决图片的相对路径问题
		// renderer.getSharedContext().setBaseURL("file:/D:/");
		renderer.layout();
		renderer.createPDF(os);

		os.flush();
		os.close();
		return true;
	}

}