javabean:
mport java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import com.hp.hpl.jena.query.Query;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.QueryExecutionFactory;
import com.hp.hpl.jena.query.QueryFactory;
import com.hp.hpl.jena.query.QuerySolution;
import com.hp.hpl.jena.query.ResultSet;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
/**
* @author Vision
*
*/
public class view {
/**
* @param args
*/
public String filePath = "src\\ontology\\test.rdf-xml.owl";// 本体文件
Model model;//定义本体模型
ResultSet results;
/**
* 构造函数，加载本体模型
*/
public view() {
model = ModelFactory.createDefaultModel();
loadModel();
}
/**
* 提交sparql的查询，输出返回结果
* @param queryStr
* @return
*/
public boolean runQuery(String queryStr) {
Query query = QueryFactory.create(queryStr);
QueryExecution qe = QueryExecutionFactory.create(query, model);
ResultSet results = qe.execSelect();
return false;
}
public ResultSet getRs() {
return results;
}
/**
* 加载本地文件形式的本体模型，失败系统退出
*
* @return
*/
private void loadModel() {
InputStreamReader in;
try {
FileInputStream file = new FileInputStream(filePath);
in = new InputStreamReader(file, "UTF-8");//处理中文
model.read(in, null);
/*
* 基于规则的推理代码段，有必要的加 String rule = "[owl:inverseOf: (?pa
* owl:inverseOf ?pb) (?a ?pa ?b)->(?b ?pb ?a)]"; Reasoner reasoner =
* new GenericRuleReasoner(Rule.parseRules(rule)); model =
* ModelFactory.createInfModel(reasoner, model);
*/
in.close();
} catch (FileNotFoundException e) {
System.out.println("无法打开本体文件，程序将终止");
System.exit(0);
} catch (IOException e) {
e.printStackTrace();
System.exit(0);
}
}
public static void main(String[] args) {
view myLearn=new view();
String queryStr="prefix test: <http://vision.pku.edu.cn/test.owl#>"+
"select * "+
"from <http://vision.pku.edu.cn/test.owl>"+
"where "+
"{"+
"?book test:hasName ?hasName."+
"}";
myLearn.runQuery(queryStr );
}
}
jsp程序：
<%
String queryStr="prefix test: <http://vision.pku.edu.cn/test.owl#>"+
"select * "+
"from <http://vision.pku.edu.cn/test.owl>"+
"where "+
"{"+
"?book test:hasName ?hasName."+
"}";
bean1.runQuery(queryStr);
ResultSet results = bean1.getRs();
while (results.hasNext())
{
QuerySolution soln = results.nextSolution();
System.out.print(soln.get("book").toString());
System.out.print("\t");
System.out.print(soln.get("hasName").toString());
System.out.print("\t");
}
%>
[返回] W3CHINA.ORG讨论区 - 语义网·描述逻辑·本体·RDF·OWL →
W3CHINA.ORG讨论区 - Web新技术讨论 → 『 Semantic Web(语义Web)/描述逻辑/本体 』 → [求助]大家看下jsp+javabean+owl程序错在哪里
(订阅本版)
2009/10/18 18:12:00
新浪微博
[求助]大家看下jsp+javabean+owl程序错在哪里
