实际上我想显示同一类型的3个人以及他们的数据类型。我尝试了一些代码，但它仍然无效。哪里可能是错的？
这里是我的jsp文件中的代码
<%
model=FileManager.get().loadModel("data.rdf");
out.print("<tr><th scope='row'><b>Sarapan Pagi</b></th>");
out.print("<th scope='row'>");
queryString=
"PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax=ns#>"+
"PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>" +
"prefix owl: <http://www.w3.org/2002/07/owl#>" +
"prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>" +
"prefix ab: <http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#>" +
"SELECT ?x " +
"WHERE{"+
" ?x rdf:type ab:KumpBijirin." +
" FILTER (? x= :BiskutKrimKraker)." +
"}";
query=QueryFactory.create(queryString);
qexec=QueryExecutionFactory.create(query,model);
try{
ResultSet results=qexec.execSelect();
while (results.hasNext()){
QuerySolution soln=results.nextSolution();
Literal name=soln.getLiteral("x");
out.print(name);
}
}finally{
qexec.close();
}out.print("</th></tr>"); %>
这是我的一些data.rdf文件。
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#AcarTimun">
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMakanMalam"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMakanTengahHari"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#KumpSayur"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#MenuHidanganSampingan"/>
<hasKalori rdf:datatype="http://www.w3.org/2001/XMLSchema#float">33.3</hasKalori>
<hasKarbohidrat rdf:datatype="http://www.w3.org/2001/XMLSchema#float">7.7</hasKarbohidrat>
<hasLemak rdf:datatype="http://www.w3.org/2001/XMLSchema#float">0.2</hasLemak>
<hasProtein rdf:datatype="http://www.w3.org/2001/XMLSchema#float">0.7</hasProtein>
<hasSaizHidangan rdf:datatype="http://www.w3.org/2001/XMLSchema#int">1hidangan</hasSaizHidangan>
</owl:NamedIndividual>
<!-- http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#AirKosong -->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#AirKosong">
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMakanMalam"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMakanTengahHari"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMinumMalam"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMinumPagi"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#MenuMinuman"/>
<hasKalori rdf:datatype="http://www.w3.org/2001/XMLSchema#float">0.0</hasKalori>
<hasKarbohidrat rdf:datatype="http://www.w3.org/2001/XMLSchema#float">0.0</hasKarbohidrat>
<hasLemak rdf:datatype="http://www.w3.org/2001/XMLSchema#float">0.0</hasLemak>
<hasProtein rdf:datatype="http://www.w3.org/2001/XMLSchema#float">0.0</hasProtein>
<hasSaizHidangan rdf:datatype="http://www.w3.org/2001/XMLSchema#float">1gelas</hasSaizHidangan>
</owl:NamedIndividual>
<!-- http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#Anggur -->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#Anggur">
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMakanMalam"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMakanTengahHari"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#KumpBuah"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#MenuPencuciMulut"/>
<hasKalori rdf:datatype="http://www.w3.org/2001/XMLSchema#float">63.2</hasKalori>
<hasKarbohidrat rdf:datatype="http://www.w3.org/2001/XMLSchema#float">15.0</hasKarbohidrat>
<hasLemak rdf:datatype="http://www.w3.org/2001/XMLSchema#float">0.0</hasLemak>
<hasProtein rdf:datatype="http://www.w3.org/2001/XMLSchema#float">0.8</hasProtein>
<hasSaizHidangan rdf:datatype="http://www.w3.org/2001/XMLSchema#int">8biji</hasSaizHidangan>
</owl:NamedIndividual>
<!-- http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#AsamLaksaPenang -->
<owl:NamedIndividual rdf:about="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#AsamLaksaPenang">
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMakanMalam"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#JenisMakanTengahHari"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#KumpBijirin"/>
<rdf:type rdf:resource="http://www.semanticweb.org/user/ontologies/2016/3/untitled-ontology-23#MenuHidanganUtama"/>
<hasKalori rdf:datatype="http://www.w3.org/2001/XMLSchema#float">432.0</hasKalori>
<hasKarbohidrat rdf:datatype="http://www.w3.org/2001/XMLSchema#float">53.0</hasKarbohidrat>
<hasLemak rdf:datatype="http://www.w3.org/2001/XMLSchema#float">2.0</hasLemak>
<hasProtein rdf:datatype="http://www.w3.org/2001/XMLSchema#float">21.1</hasProtein>
<hasSaizHidangan rdf:datatype="http://www.w3.org/2001/XMLSchema#int">1mangkuk</hasSaizHidangan>
</owl:NamedIndividual>