我写了一个将数据转换为RDF的函数,我需要将此RDF上传到fuseki服务器。如何使用Java将RDF代码上传到fuseki服务器?
我试图从here实现代码如下
public class GenerateRDF {
public void setRDF(String[] personalData) {
String serviceURI = "http://localhost:3030/Date";
DatasetAccessorFactory factory = null;
DatasetAccessor accessor;
accessor = factory.createHTTP(serviceURI);
String name = personalData[0];
String nationality = personalData[1];
String date = personalData[2];
String address = personalData[3];
String mobile = personalData[4];
String email = personalData[5];
String website = personalData[6];
String profesional = personalData[7];
String education = personalData[8];
String communication = personalData[9];
String digital = personalData[10];
String professional = personalData[11];
String management = personalData[12];
String certifications = personalData[13];
InputStream in = null;
Model model = ModelFactory.createDefaultModel();
Resource node = model.createResource(personURI)
.addProperty(FOAF.name, name)
.addProperty(FOAF.member, nationality)
.addProperty(FOAF.birthday, date)
.addProperty(FOAF.homepage, address)
.addProperty(FOAF.phone, mobile)
.addProperty(FOAF.yahooChatID, email)
.addProperty(FOAF.weblog, website)
.addProperty(FOAF.plan, profesional)
.addProperty(FOAF.knows, education)
.addProperty(FOAF.depiction, communication)
.addProperty(FOAF.interest, digital)
.addProperty(FOAF.publications, professional)
.addProperty(FOAF.maker, management)
.addProperty(FOAF.made, certifications);
String base = "http://test-projects.com/";
model.read(in, base, "RDF/XML");
accessor.putModel(model);
model.write(System.out);
}
}
它返回以下异常:
异常在线程 “AWT-EventQueue的-0” 显示java.lang.NullPointerException 在java.io.FilterInputStream.read(Unknown Source) at org.apache.xerces.impl.XMLEntityManager $ RewindableInputStream.readAndBuffer(Unknown Source) at org.apache.xerces.impl.XMLEntityManager.setupCurrentE ntity(未知来源) 在org.apache.xerces.impl.XMLEntityManager.startEntity(未知来源) 在org.apache.xerces.impl.XMLEntityManager.startDocumentEntity(未知来源) 在org.apache.xerces.impl.XMLDocumentScannerImpl .setInputSource(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers。 XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at com.hp.hpl.jena.rdf.arp.impl.RDFXMLParser.parse(RDFXMLParser.java:151) at com.hp.hpl.jena.rdf.arp.ARP.load(ARP.java:119) at org.apache.jena.riot.lang .LangRDFXML.parse(LangRDFXML.java:142) at org.apache.jena.riot.RDFParserRegistry $ ReaderRIOTFactoryImpl $ 1.read(RDFParserRegistry.java:142) at org.apache.jena.riot.RDFDataMgr.process(RDFDataMgr。 java:760) at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:258) at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:244) at org.apache。 jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:69) at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:274) at GenerateRDF.setRDF(GenerateRDF。 java:59) at PersonalInfo $ 2.actionPerformed(PersonalInfo.java:251) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton $ Handler。的actionPerformed(未知来源) 在javax.swing.DefaultButtonModel.fireActionPerformed(未知来源) 在javax.swing.DefaultButtonModel.setPressed(未知来源) 在javax.swing.plaf.basic.BasicButtonListener.mouseReleased(未知来源) 在java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.Ligh tweightDispatcher.retargetMouseEvent(未知来源) 在java.awt.LightweightDispatcher.processMouseEvent(未知来源) 在java.awt.LightweightDispatcher.dispatchEvent(未知来源) 在java.awt.Container.dispatchEventImpl(未知来源) 在java的。 awt.Window.dispatchEventImpl(来源不明) 在java.awt.Component.dispatchEvent(来源不明) 在java.awt.EventQueue.dispatchEventImpl(来源不明) 在java.awt.EventQueue.access $ 500(来源不明) 在java.awt.EventQueue $ 3。运行(来源不明) 在java.awt.EventQueue中的$ 3.run(来源不明) 在java.security.AccessController.doPrivileged(本机方法) 在java.security.ProtectionDomain $ JavaSecurityAccessImpl.doIntersectionPrivilege(来源不明) 是java .security.ProtectionDomain $ JavaSecurityAccessImpl.doIntersectionPrivilege(来源不明) 在java.awt.EventQueue中的$ 4.run(来源不明) 在java.awt.EventQueue中的$ 4.run(来源不明) 在java.security.AccessController.doPrivileged( (未知源) at java.awt.EventDispatchThread.pumpOneEventFor过滤器(来源不明) 在java.awt.EventDispatchThread.pumpEventsForFilter(来源不明) 在java.awt.EventDispatchThread.pumpEventsForHierarchy(来源不明) 在java.awt.EventDispatchThread.pumpEvents(来源不明) 在java.awt中。 EventDispatchThread.pumpEvents(来源不明) 在java.awt.EventDispatchThread.run(来源不明)
有没有办法解决这个问题?我接受的解决方案......
你是对的,对不起!没有文件,我需要将RDF代码上传到Fuseki服务器。 –