java - 找不到类 FOP

Question

你好，我正在尝试使用 FOP 将 xml 文件转换为 pdf，但我一直遇到错误，现在我遇到了错误

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/xmlgraphics/io/ResourceResolver
at org.apache.fop.apps.FopConfParser.<init>(FopConfParser.java:122)
at org.apache.fop.apps.FopFactory.newInstance(FopFactory.java:132)
at run.ExampleFO2PDF.main(ExampleFO2PDF.java:62)

我在构建路径中有 FOP 库以及 xmlgraphics 和 commons logging 和 Avalon 框架

这是我要运行的代码

        import java.io.BufferedOutputStream;
        import java.io.File;
        import java.io.FileNotFoundException;
        import java.io.FileOutputStream;
        import java.io.IOException;
        import java.io.OutputStream;

        import javax.xml.transform.Result;
        import javax.xml.transform.Source;
        import javax.xml.transform.Transformer;
        import javax.xml.transform.TransformerConfigurationException;
        import javax.xml.transform.TransformerException;
        import javax.xml.transform.TransformerFactory;
        import javax.xml.transform.sax.SAXResult;
        import javax.xml.transform.stream.StreamSource;

        import org.apache.fop.apps.*;
        import org.xml.sax.SAXException;

       public class pdf{
        public static void main(String[] args) throws SAXException, IOException, TransformerException
  {
        FopFactory fopFactory = FopFactory.newInstance(new File("."));
                OutputStream out = new BufferedOutputStream(new FileOutputStream(new File("D:/temp/myfile.pdf")));
                try {
                  Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, out);
                  TransformerFactory factory = TransformerFactory.newInstance();
                  Transformer transformer = factory.newTransformer(); // identity transformer
                  Source src = new StreamSource(new File("D:/temp/test.xml"));
                  Result res = new SAXResult(fop.getDefaultHandler());
                  transformer.transform(src, res);
                } finally {
                  //Clean-up
                  out.close();
                }
           }

    }

Answer 1

abstract interface org.apache.fop.apps.MimeConstants implements org.apache.xmlgraphics.util.MimeConstants

org.apache.xmlgraphics.util.MimeConstants 属于 xmlgraphics-commons-1.5.jar。只需将 xmlgraphics-commons-1.5.jar 添加到您的类路径中，即可解决问题。