在Apache Tomcat中集成Apache Fuseki并从Java Servlet运行SPARQL查询

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.jena.query.*;
import org.apache.jena.rdfconnection.RDFConnection;

@WebServlet("/sparqlQuery")
public class SparqlQueryServlet extends HttpServlet {
    private static final String FUSEKI_ENDPOINT = "http://localhost:3030/mydataset/query";

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String queryString = "SELECT ?s ?p ?o WHERE { ?s ?p ?o } LIMIT 10";
        executeQuery(queryString, response);
    }

    private void executeQuery(String queryString, HttpServletResponse response) throws IOException {
        RDFConnection conn = RDFConnection.create(FUSEKI_ENDPOINT);
        QueryExecution qexec = conn.query(queryString);
        ResultSet results = qexec.execSelect();
        ResultSetFormatter.outputAsJSON(response.getWriter(), results);
        qexec.close();
    }
}