问如何配置RDF4J Rio写入器写入带有特殊字符的IRIs？

EN

import org.eclipse.rdf4j.model.BNode;
import org.eclipse.rdf4j.model.IRI;
import org.eclipse.rdf4j.model.Model;
import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
import org.eclipse.rdf4j.model.util.ModelBuilder;
import org.eclipse.rdf4j.rio.*;
import org.eclipse.rdf4j.rio.helpers.BasicWriterSettings;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;

public class ExamplePathVariable {

    private final static Logger LOG = Logger.getLogger(ExamplePathVariable.class.getCanonicalName());
    public static void main(String[] args) {

        SimpleValueFactory rdf = SimpleValueFactory.getInstance();
        ModelBuilder modelBuilder = new ModelBuilder();

        BNode subject = rdf.createBNode();
        IRI predicate = rdf.createIRI("http://example.org/onto#hasURI");

        // IRI with special characters !
        IRI object = rdf.createIRI("http://example.org/{token}");

        modelBuilder.add(subject, predicate, object);

        String turtleStr = writeToString(RDFFormat.TURTLE, modelBuilder.build());
        LOG.log(Level.INFO, turtleStr);
    }

    static String writeToString(RDFFormat format, Model model) {
        OutputStream out = new ByteArrayOutputStream();

        try {
            Rio.write(model, out, format,
                    new WriterConfig().set(BasicWriterSettings.INLINE_BLANK_NODES, true));
        } finally {
            try {
                out.close();
            } catch (IOException e) {
                LOG.log(Level.WARNING, e.getMessage());
            }
        }

        return out.toString();
    }
}

INFO: 
[] <http://example.org/onto#hasURI> <http://example.org/%7Btoken%7D> .