我有一个 JFXButtons 的 JFXListView。用于正常工作的代码。我不知道发生了什么，但是当单击该 JFXListView 的 JFXButton 时出现以下异常：
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.ConnectException: Connection refused to host: 192.168.1.2; nested exception is:
java.net.ConnectException: Connection refused: connect
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:393)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:283)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:260)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:161)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:227)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:179)
at com.sun.proxy.$Proxy7.paramService(Unknown Source)
at javafxcyberwind.UtilisateurController.lambda$getServices$13(UtilisateurController.java:164)
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.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.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.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.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$MouseEventNotification.run(GlassViewEventHandler.java:394)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$353(GlassViewEventHandler.java:432)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:431)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.rmi.ConnectException: Connection refused to host: 192.168.1.2; nested exception is:
java.net.ConnectException: Connection refused: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:338)
at sun.rmi.registry.RegistryImpl_Stub.lookup(RegistryImpl_Stub.java:112)
at java.rmi.Naming.lookup(Naming.java:101)
at javafxcyberwind.Cloud_ServeurIMPL.paramService(Cloud_ServeurIMPL.java:244)
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.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:361)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
... 1 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at java.net.Socket.<init>(Socket.java:434)
at java.net.Socket.<init>(Socket.java:211)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 23 more
那就是发生异常的控制器：
package javafxcyberwind;
import static javafxcyberwind.LoginController.R;
public class UtilisateurController implements Initializable, ControlledScreen {
ScreensController myController;
@FXML
private JFXListView li_se;
@FXML
private StackPane st_dl;
@FXML
private AnchorPane pn_us, pn_li;
@FXML
private Rectangle rec;
ServerSocket sv;
private int p1, k;
IP ip = new IP();
File selectedFile;
boolean t = false;
private final String urep = "c:/Utilisateur/";
@Override
public void initialize(URL url, ResourceBundle rb) {
File p = new File(urep);
p.mkdir();
String[] entries = p.list();
for (String s : entries) {
File currentFile = new File(p.getPath(), s);
currentFile.delete();
}
li_se.getItems().clear();
}
@FXML
public void getServices(ActionEvent e) {
try {
li_se.getItems().clear();
for (Object service : R.ListeService()) {
JFXButton b = new JFXButton("" + service);
b.setStyle("-fx-rippler-fill:black;-fx-text-fill:black;-fx-font-size:16px;-fx-background-color:orange;-fx-background-radius:5px;");
b.setOnAction((ActionEvent event) -> {
try {
VBox vBox = new VBox(10);
JFXListView li_par = new JFXListView();
JFXTextField[] fields = new JFXTextField[22];
TextFieldEntier[] fEntiers = new TextFieldEntier[22];
TextFieldReel[] fRéels = new TextFieldReel[22];
ChoiceBox<String> choiceBox = new ChoiceBox<>();
choiceBox.getStylesheets().add(getClass().getResource("/choise-box.css").toExternalForm());
choiceBox.getItems().addAll("true", "false");
ArrayList<Object> tab = new ArrayList<>();
JFXButton folder = new JFXButton("Ouvrir le répertoire");
folder.setDisable(true);
ObservableList<String> ListParam = FXCollections.observableArrayList(R.paramService(b.getText()));
JFXDialogLayout content = new JFXDialogLayout();
content.setHeading(new Text(b.getText()));
content.setBody(vBox);
JFXDialog dialog = new JFXDialog(st_dl, content, JFXDialog.DialogTransition.CENTER);
k = 0;
ListParam.stream().map((st) -> {
if (st.equals("double")) {
fRéels[k] = new TextFieldReel();
fRéels[k].setPadding(new Insets(11));
Label lb = new Label("Argument ( Réel ) : ");
lb.setPadding(new Insets(7));
lb.setStyle("-fx-min-Width:178;-fx-text-fill:white;-fx-background-color:orange;-fx-background-radius:5px;");
HBox hb = new HBox(10);
hb.getChildren().add(lb);
hb.getChildren().add(fRéels[k]);
li_par.getItems().add(hb);
}
return st;
}).map((st) -> {
if (st.equals("java.lang.String")) {
fields[k] = new JFXTextField();
fields[k].setMinHeight(35);
fields[k].setMinWidth(157);
Label lb = new Label("Argument ( Texte ) : ");
lb.setMinWidth(178);
lb.setPadding(new Insets(7));
lb.setStyle("-fx-text-fill:white;-fx-background-color:orange;-fx-background-radius:5px;");
HBox hb = new HBox(10);
hb.getChildren().add(lb);
hb.getChildren().add(fRéels[k]);
li_par.getItems().add(hb);
}
return st;
}).map((st) -> {
if (st.equals("int")) {
fEntiers[k] = new TextFieldEntier();
fEntiers[k].setPadding(new Insets(11));
Label lb = new Label("Argument ( Entier ) : ");
lb.setPadding(new Insets(7));
lb.setStyle("-fx-min-Width:178;-fx-text-fill:white;-fx-background-color:orange;-fx-background-radius:5px;");
HBox hb = new HBox(10);
hb.getChildren().add(lb);
hb.getChildren().add(fEntiers[k]);
li_par.getItems().add(hb);
}
return st;
}).map((st) -> {
if (st.equals("boolean")) {
Label lb = new Label("Argument ( " + st + " ) : ");
lb.setMinWidth(178);
lb.setPadding(new Insets(7));
lb.setStyle("-fx-text-fill:white;-fx-background-color:orange;-fx-background-radius:5px;");
HBox hb = new HBox(10);
hb.getChildren().add(lb);
hb.getChildren().add(choiceBox);
li_par.getItems().add(hb);
}
return st;
}).map((st) -> {
if (st.equals("java.io.File")) {
fields[k] = new JFXTextField();
fields[k].setMinHeight(35);
fields[k].setMinWidth(157);
Label lb = new Label("Argument ( Fichier ) : ");
lb.setMinWidth(178);
lb.setPadding(new Insets(7));
lb.setStyle("-fx-text-fill:white;-fx-background-color:orange;-fx-background-radius:5px;");
HBox hb = new HBox(10);
hb.getChildren().add(lb);
hb.getChildren().add(fields[k]);
li_par.getItems().add(hb);
int x = k;
fields[k].addEventHandler(MouseEvent.MOUSE_CLICKED, (javafx.scene.input.MouseEvent e1) -> {
FileChooser fc = new FileChooser();
selectedFile = fc.showOpenDialog(null);
if (selectedFile != null) {
fields[x].setText(selectedFile.getAbsolutePath());
}
});
}
return st;
}).forEachOrdered((_item) -> {
k++;
});
JFXButton exe = new JFXButton("Exécuter");
WeatherIconView weatherIcon = new WeatherIconView(WeatherIcon.CLOUD);
weatherIcon.setSize("30");
weatherIcon.setFill(Color.DODGERBLUE);
exe.setGraphic(weatherIcon);
exe.setStyle("-fx-text-fill:DODGERBLUE;-fx-background-color:white;-fx-background-radius:5px;");
exe.setPadding(new Insets(10));
JFXTextField res = new JFXTextField();
res.setMinWidth(150);
Label re = new Label("Résultat");
HBox hb = new HBox(10);
hb.getChildren().add(re);
hb.getChildren().add(res);
hb.setAlignment(Pos.CENTER_RIGHT);
hb.getChildren().add(folder);
li_par.setMaxHeight(180);
li_par.setMinWidth(384);
vBox.getChildren().add(li_par);
vBox.setAlignment(Pos.CENTER_RIGHT);
vBox.getChildren().add(exe);
vBox.getChildren().add(hb);
exe.setOnAction((ActionEvent e2) -> {
tab.clear();
try {
int k1 = 0;
for (String st : ListParam) {
if (st.equals("int")) {
tab.add(Integer.valueOf(fEntiers[k1].getText()));
}
if (st.equals("double")) {
tab.add(Double.valueOf(fRéels[k1].getText()));
}
if (st.equals("boolean")) {
tab.add(Boolean.valueOf(choiceBox.getValue()));
}
if (st.equals("java.lang.String")) {
tab.add(fields[k1].getText());
}
if (st.equals("java.io.File")) {
Fichier f = new Fichier(selectedFile.getName());
tab.add(f);
p1 = (int) ((Math.random() * (9000 - 5000)) + 5000);
R.uploadToCloud(p1, selectedFile.getName());
Socket s = new Socket(ip.IPserveur(), p1);
ObjectOutputStream out;
FileInputStream inf = new FileInputStream(new File(selectedFile.getAbsolutePath()));
out = new ObjectOutputStream(s.getOutputStream());
byte buf[] = new byte[1024];
int n;
while ((n = inf.read(buf)) != -1) {
out.write(buf, 0, n);
}
out.close();
}
k1++;
}
if (R.retourService(b.getText()).equals("int") || R.retourService(b.getText()).equals("double") || R.retourService(b.getText()).equals("boolean") || R.retourService(b.getText()).equals("class java.lang.String")) {
R.envoieDemande(b.getText(), "", 0, tab.toArray());
res.setText("" + R.getResult());
}
if (R.retourService(b.getText()).equals("class java.io.File")) {
p1 = (int) ((Math.random() * (9000 - 5000)) + 5000);
LocateRegistry.createRegistry(p1);
Utilisateur_MethodsPAIRIMPL U = new Utilisateur_MethodsPAIRIMPL();
Naming.bind("rmi://" + InetAddress.getLocalHost().getHostAddress() + ":" + p1 + "/" + R.getEmail(), U);
R.envoieDemande(b.getText(), InetAddress.getLocalHost().getHostAddress(), p1, tab.toArray());
res.setText(urep + R.getResfile());
folder.setDisable(false);
}
} catch (RemoteException | InvocationTargetException ex) {
Alert alert = new Alert(Alert.AlertType.ERROR);
alert.setTitle("Erreur");
alert.setHeaderText("Erreur");
alert.setContentText("Veuillez choisir une option");
ButtonType btn_annuler = new ButtonType("Annuler");
ButtonType btn_réessayer = new ButtonType("Réessayer");
alert.setGraphic(new ImageView("icon/erreur.png"));
alert.getButtonTypes().setAll(btn_réessayer, btn_annuler);
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
ex.printStackTrace(pw);
TextArea area = new TextArea(sw.toString());
alert.getDialogPane().setExpandableContent(area);
Stage stage = (Stage) alert.getDialogPane().getScene().getWindow();
stage.getIcons().add(new Image("icon/erreur.png"));
Optional<ButtonType> res1 = alert.showAndWait();
if (res1.get() == btn_réessayer) {
alert.close();
}
if (res1.get() == btn_annuler) {
dialog.close();
alert.close();
}
} catch (IOException | AlreadyBoundException ex) {
Logger.getLogger(UtilisateurController.class.getName()).log(Level.SEVERE, null, ex);
}
});
JFXButton button = new JFXButton("Terminer " + b.getText());
button.setOnAction((ActionEvent evt) -> {
dialog.close();
});
content.setActions(button);
dialog.setOverlayClose(false);
dialog.show();
dialog.setOnDialogOpened((evt) -> {
pn_li.setDisable(true);
pn_us.setDisable(true);
});
dialog.setOnDialogClosed((evt) -> {
pn_li.setDisable(false);
pn_us.setDisable(false);
});
folder.setOnAction((ActionEvent evt) -> {
try {
Desktop.getDesktop().open(new File(urep));
} catch (IOException ex) {
Logger.getLogger(UtilisateurController.class.getName()).log(Level.SEVERE, null, ex);
}
});
} catch (RemoteException ex) {
Logger.getLogger(UtilisateurController.class.getName()).log(Level.SEVERE, null, ex);
}
});
li_se.getItems().add(b);
}
if (!li_se.isExpanded()) {
li_se.setExpanded(true);
li_se.depthProperty().set(1);
}
} catch (RemoteException ex) {
Logger.getLogger(UtilisateurController.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
这是远程方法 paramService ：
@Override
public ArrayList paramService(String service) throws RemoteException {
ArrayList par = null;
try {
Connection c = DriverManager.getConnection("jdbc:mysql://192.168.1.2:3306/Cyberwind", "cloud", "");
Statement sta = c.createStatement();
ResultSet res = sta.executeQuery("SELECT `email`, `ip`, `port` FROM `connexion` WHERE `service` = '" + service + "' ORDER BY RAND() LIMIT 1");
res.next();
Participant_MethodsPAIR S = (Participant_MethodsPAIR) Naming.lookup("rmi://" + res.getString("ip") + ":" + res.getInt("port") + "/" + res.getString("email"));
P = S.peer();
par = P.getServiceParameterType(service);
res.close();
} catch (SQLException | NotBoundException | MalformedURLException ex) { Logger.getLogger(Cloud_ServeurIMPL.class.getName()).log(Level.SEVERE, null, ex);
}
return par;
}
如何删除此 RemoteException ？