O_1. SPARQL 실행

SPARQL Endpoint에 질의하기

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private void query() {

String queryString =

"SELECT * {" +

"?s ?p ?o ." +

"} limit 10" ;

Query query = QueryFactory.create(queryString);

query.serialize(new IndentedWriter(System.out, true));

System.out.println();

QueryExecution qexec = QueryExecutionFactory.sparqlService("http://dbpedia.org/sparql", query);

System.out.println("Results: ");

try {

ResultSet rs = qexec.execSelect();

for (; rs.hasNext();) {

QuerySolution rb = rs.nextSolution();

RDFNode x = rb.get("s");

RDFNode y = rb.get("p");

RDFNode z = rb.get("o");

System.out.println("    " + x + "    " + y + "     " + z );

}

} finally {

qexec.close();

}

}