Question

package rdf;

import com.hp.hpl.jena.db.DBConnection;
import com.hp.hpl.jena.db.IDBConnection;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.ModelMaker;
import com.hp.hpl.jena.rdf.model.Property;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.rdf.model.Statement;
import com.hp.hpl.jena.rdf.model.StmtIterator;
import com.hp.hpl.jena.util.FileManager;
import com.hp.hpl.jena.util.PrintUtil;

public class DbModelTester {

/**
 * @param args
 */

public static final String RDF_FILE = "http://www.liyangyu.com/foaf.rdf";
public static final String ONTOLOGY_FILE = "http://xmlns.com/foaf/0.1/";
private static String className = "com.mysql.jdbc.Driver";
private static String DB_URL = "jdbc:mysql://localhost:3306/myFoafModel";
private static String DB_USER = "root";
private static String DB_PASSWD = "passwd";
private static String DB_TYPE = "MySQL";
private static String DOCUMENT_NAME = "myFoafRDF";
private static String ONTOLOGY_NAME = "foaf.owl";

public static void main(String[] args) {
    // TODO Auto-generated method stub
    IDBConnection conn = null;
    ModelMaker maker = null;
    try{
        Class.forName(className);
        conn = new DBConnection(DB_URL, DB_USER, DB_PASSWD, DB_TYPE);
    } catch(Exception e){
        e.printStackTrace();
    }
    maker = ModelFactory.createModelRDBMaker(conn);
    Model m = null;
    if ( !maker.hasModel(DOCUMENT_NAME) == true ) {
        System.out.println( "Loading instance document - one time only" );
        m = maker.createModel(DOCUMENT_NAME);
        FileManager.get().readModel(m,RDF_FILE);
    } else {
        m = maker.getModel(DOCUMENT_NAME);
    }
    printStatements(m, null, null, null);

    // close the connection
    try {
        conn.close();
    } catch(Exception e) { e.printStackTrace(); }

}
private static void printStatements(Model m, Resource s, Property p, Resource o) {
    for (StmtIterator i = m.listStatements(s,p,o); i.hasNext(); ) {
        Statement stmt = i.nextStatement();
        System.out.println(" - " + PrintUtil.print(stmt));
    }
}
}

当我运行此代码时，我收到此错误

线程“main”中的异常java.lang.Error：未解决的编译问题：对于ModelFactory类型，未定义createModelRDBMaker（IDBConnection）方法在rdf.DbModelTester.main（DbModelTester.java:41）

我想使用Jena在MySql中保留RDF模型。我正在使用最新版本的Jena（apache-jena-2.11.1）并使用MySql 5.5。

我想使用Jena在MySql中保留RDF模型

0 个答案: