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JavaFxアプリケーション内のアンケートから質問を保存してロードします。 JAXBを使ってクラスを.xmlファイルに保存するメソッドは正常に動作しますが、うまくいけばunmallallerを動作させることができません。ロードする.xmlを選択するたびに、何も起こりません。エラーはありません。異なる質問の値は、保存された質問に変更されません。JAXB：XMLアンマーシャラーは何もロードしていません
私はステップごとにガイドthisに従っていますが、見つからない部分があります。
ロード・メソッド：
public void loadQuestions(File file) throws Exception{
JAXBContext context = JAXBContext.newInstance(QuestionListWrapper.class);
Unmarshaller um = context.createUnmarshaller();
QuestionListWrapper wrapper = (QuestionListWrapper) um.unmarshal(file);
survey.getQuestions().clear();
survey.getQuestions().addAll(wrapper.getQuestions());
}
@FXML private Button bLoad;
@FXML
private void handleLoad() throws Exception{
Stage stage = (Stage) bLoad.getScene().getWindow();
FileChooser fileChooser = new FileChooser();
FileChooser.ExtensionFilter extFilter = new FileChooser.ExtensionFilter("XML files (*.xml)", "*.xml");
fileChooser.getExtensionFilters().add(extFilter);
File file = fileChooser.showOpenDialog(stage);
if (file != null){
loadQuestions(file);
}
}
質問クラス：
package survey.model;
import javafx.beans.property.*;
public class Question {
private StringProperty text;
private BooleanProperty answer;
private StringProperty comment;
private StringProperty information;
public Question() {
text = new SimpleStringProperty("");
answer = new SimpleBooleanProperty(false);
comment = new SimpleStringProperty("");
information = new SimpleStringProperty("");
}
public String getInformation() {
return information.get();
}
public StringProperty informationProperty() {
return information;
}
public void setInformation(String information) {
this.information.set(information);
}
public String getComment() { return comment.get(); }
public StringProperty commentProperty() {
return comment;
}
public void setComment(String comment) {
this.comment.set(comment);
}
public Question(String text) {
setText(text);
}
public boolean isAnswer() {
return answer.get();
}
public BooleanProperty answerProperty() {
return answer;
}
public void setAnswer(boolean answer) {
this.answer.set(answer);
}
public String getText() {
return text.get();
}
public StringProperty textProperty() {
return text;
}
public void setText(String text) {
this.text.set(text);
}
}
調査クラス：
package survey.model;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
public class Survey {
private ObservableList<Question> questions = FXCollections.observableArrayList();
public ObservableList<Question> getQuestions() {
return questions;
}
}
QuestionListWrapper：
package survey.model;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import java.util.List;
@XmlRootElement(name = "questions")
public class QuestionListWrapper {
private List<Question> questions;
@XmlElement(name = "question")
public List<Question> getQuestions(){
return questions;
}
public void setQuestions(List<Question> questions){
this.questions = questions;
}
}
XML：
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<questions>
<question>
<answer>true</answer>
<comment></comment>
<information>asfd</information>
<text>Der Stelleninhaber wird in verschiedenen Tätigkeitsbereichen eingesetzt (z.B. durch ein vorhandenes Rotationssystem).</text>
</question>
<question>
<answer>true</answer>
<comment></comment>
<information>sdasd</information>
<text>Die Zuteilung und Erweiterung von Tätigkeitsbereichen erfolgt unter Berücksichtigung der Fähigkeiten, Kenntnisse und Wünsche des Stelleninhabers.</text>
</question>
<question>
<answer>false</answer>
<comment>asdasd</comment>
<information>sadsad</information>
<text>Gleiche Teiltätigkeiten wiederholen sich so häufig, dass die Arbeit monoton und eintönig erscheint.</text>
</question>
<question>
<answer>false</answer>
<comment></comment>
<information>asdsad</information>
<text>Die Arbeit wird hauptsächlich in einer Körperhaltung ausgeführt</text>
</question>
</questions>
誰が欠けているものか、間違っているかもしれないものを知っていますか？前もって感謝します！
EDIT： 私はSurveyとQuestionListWrapperのメソッドが同じ名前を持っているので、多分それは正しくロードされないと思ったので、私は、QuestionListWrapperからgetQuestions()の名前を変更しました。
java.lang.NullPointerException
at com.sun.xml.internal.bind.v2.runtime.reflect.Lister$CollectionLister.addToPack(Lister.java:289)
at com.sun.xml.internal.bind.v2.runtime.reflect.Lister$CollectionLister.addToPack(Lister.java:253)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.Scope.add(Scope.java:106)
at com.sun.xml.internal.bind.v2.runtime.property.ArrayERProperty$ReceiverImpl.receive(ArrayERProperty.java:198)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.endElement(UnmarshallingContext.java:597)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.SAXConnector.endElement(SAXConnector.java:165)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:609)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2967)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:841)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:770)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:243)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:214)
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:157)
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:162)
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:171)
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:189)
at survey.view.moduleAabController.loadQuestions(moduleAabController.java:306)
at survey.view.moduleAabController.handleLoad(moduleAabController.java:325)
at survey.view.moduleAabController.handleButtonAction(moduleAabController.java:258)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8413)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)
「何も起こらない」？まあ、明らかに何かが起こる。何かエラーがありますか？あなたのXMLと 'QuestionListWrapper'はどのように見えますか？ – lexicore
@lexicore質問を更新しました。私は何の誤りもありません。 'survey 'の質問の値は、.xmlをアプリケーションにロードするときに変更されません。 – jeypeu
@lexicore可能性のあるエラーソースが見つかりました（EDITを参照）。 – jeypeu