Apache FOP embedded，如何使用配置文件

Question

我正在使用Apache FOP将SVG渲染为PDF。这个SVG有一种特殊的字体，我也想在生成的PDF中使用。

我使用的配置文件如下所示：

<?xml version="1.0"?>
<fop version="1.0">
    <base>.</base>
    <source-resolution>72</source-resolution>
    <target-resolution>72</target-resolution>
    <default-page-settings height="11.00in" width="8.50in" />
    <renderers>
        <renderer mime="application/pdf">
            <filterList>
                <value>flate</value>
            </filterList>
            <fonts>
                <font
                    metrics-url="path/to/metrics.xml"
                    kerning="yes"
                    embed-url="path/to/font.ttf">
                    <font-triplet name="font name" style="normal" weight="normal" />
                </font>
            </fonts>
        </renderer>
    </renderers>
</fop>

我从示例配置中复制并粘贴了它，并编辑了所有不需要的渲染器。现在我尝试使用这样的配置：

public void convertSVG2PDF(String svg, OutputStream out) throws IOException, TranscoderException {

        // Create transcoder
        AbstractFOPTranscoder transcoder = new PDFTranscoder();
        DefaultConfigurationBuilder cfgBuilder = new DefaultConfigurationBuilder();
        Configuration cfg;

        try {
            File configFile = new File("path/to/config.xml");

            cfg = cfgBuilder.buildFromFile(configFile);
            transcoder.configure(cfg);
            System.err.println(cfg.getValue());
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }

        // Setup input
        Reader in = new java.io.StringReader(svg);

        try {
            TranscoderInput input = new TranscoderInput(in);
            // Setup output
            try {
                TranscoderOutput output = new TranscoderOutput(out);
                // Do the transformation
                transcoder.transcode(input, output);
            } finally {
                out.close();
            }
        } finally {
            in.close();
        }
    }

这将呈现一个完美的PDF，但是没有使用字体。当我尝试cfg.getValue()时，我也会收到这条消息

文件/path/to/conf.xml:1:20中没有与配置元素“fop”关联的值

我还尝试将配置重命名为。xconf，但这并没有改变什么。

Answer 1

试试这个...它对我有用：

FopFactory fopFactory;
fopFactory = FopFactory.newInstance();



File configFile = new File("path/to/config.xml");
fopFactory.setUserConfig(configFile);

Answer 2

这适用于版本fop 2.3

File xconf = new File(this.fopConfigFile.toURI()); 
FopConfParser parser = null;
try {
  //parsing configuration 
  parser = new FopConfParser(xconf);
} catch (SAXException e) {
    throw new UncheckedIOException(new IOException(e));
} catch (IOException e) {
    throw new UncheckedIOException(e);
}  
//building the factory with the user options
FopFactoryBuilder builder = parser.getFopFactoryBuilder(); 
this.fopFactory = builder.build();
Fop fop = this.fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);

文档 ： https://xmlgraphics.apache.org/fop/2.3/upgrading.html