使用Apache FOP+XML-FO生成PDF文档

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package tst.word;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.FormattingResults;
import org.apache.fop.apps.MimeConstants;
import org.apache.fop.apps.PageSequenceResults;
import org.xml.sax.InputSource;
public class PDFWithFOP {
 public static void main(String[] args) throws Exception{
  new PDFWithFOP().run();
  System.out.println("success");
 }
 public void run() throws Exception{
  File fo=new File("D:\\newtst\\helloworld.fo");
  File pdf=new File("D:\\newtst\\helloworld.pdf");
  convertFO2PDF(fo,pdf);
 }
 public void convertFO2PDF(File fo, File pdf) throws Exception {
        //Construct driver
  FopFactory factory=FopFactory.newInstance();
  FOUserAgent userAgent=factory.newFOUserAgent();
  OutputStream out=null;
  out=new FileOutputStream(pdf);
  out=new BufferedOutputStream(out);
  Fop fop=factory.newFop(MimeConstants.MIME_PDF,userAgent,out);
  TransformerFactory transformerFactory=TransformerFactory.newInstance();
  Transformer transformer=transformerFactory.newTransformer();
  Source source=new StreamSource(fo);
  Result res=new SAXResult(fop.getDefaultHandler());
  transformer.transform(source,res);
  out.close();
   }
}

关键在于XML-FO对XML的描述。可通过XSTL转换的方式生成FO，也可通过自己的程序去生成FO。
通过FOP可最终产生PDF、RTF等等各种文档类型。

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