您好,我需要在表格视图中显示日期列;在数据库中,我将字段fecha_nacimiento
声明为date
,我使用了datepicker
将该数据插入数据库,到目前为止该操作还可以,因此下一步是格式化表格视图单元格可以正确显示日期数据,在此站点的帮助下,我做到了,但是当我需要从数据库中检索日期数据时,我得到了一个错误,像这样:
Caused by: java.lang.UnsupportedOperationException
at java.sql.Date.toInstant(Unknown Source)
这是我的controller
代码
public void initialize(URL arg0, ResourceBundle arg1) {
clienteid.setCellValueFactory(new PropertyValueFactory <Persona, Integer>("id_cliente"));
nombrescol.setCellValueFactory(new PropertyValueFactory <Persona, String>("nombres"));
apellidoscol.setCellValueFactory(new PropertyValueFactory <Persona, String>("apellidos"));
//fechacli.setCellValueFactory(new PropertyValueFactory <Persona, LocalDate>("fechacliente"));//
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
fechacli.setCellFactory(column -> {
return new TableCell<Persona, LocalDate>() {
@Override
protected void updateItem(LocalDate item, boolean empty) {
super.updateItem(item, empty);
if (item == null || empty) {
setText(null);
} else {
setText(formatter.format(item));
}
}
};
});
seleccionaregistros();
seleccionanombre();
seleccionapellido();
}
public void seleccionaregistros() {
ObservableList <Persona> data =FXCollections.observableArrayList();
Connection conn=null;{
try {
conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=prueba", "sa", "milkas87");
Statement mostrar=conn.createStatement();
ResultSet rs;
rs= mostrar.executeQuery("select * from cliente");
while ( rs.next() )
{
data.add(new Persona(
rs.getString("nombre"),
rs.getString("apellido"),
rs.getInt("id"),
rs.getDate(4).toInstant().atZone(ZoneId.systemDefault()).toLocalDate())
);
tablacliente.setItems(data);
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
这是我的persona class
代码
package application;
import java.time.LocalDate;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
public class Persona {
private StringProperty nombres;
private StringProperty apellidos;
private IntegerProperty id_cliente;
private ObjectProperty <LocalDate>fechacliente;
public Persona (String nombres, String apellidos, Integer id_cliente, LocalDate fechacliente) {
this.nombres= new SimpleStringProperty (nombres);
this.apellidos= new SimpleStringProperty ( apellidos);
this.id_cliente=new SimpleIntegerProperty (id_cliente);
this.fechacliente= new SimpleObjectProperty<>(fechacliente);
}
public LocalDate getFechaCliente() {
return fechacliente.get();
}
public void setFechaCliente(LocalDate fechacliente) {
this.fechacliente = new SimpleObjectProperty<>(fechacliente);
}
public ObjectProperty<LocalDate> fechaClienteProperty() {
return fechacliente;
}
public String getNombres() {
return nombres.get();
}
public void setNombres(String nombres) {
this.nombres=new SimpleStringProperty (nombres);
}
public String getApellidos() {
return apellidos.get();
}
public void setApellidos(String apellidos) {
this.apellidos=new SimpleStringProperty ( apellidos);
}
public Integer getId_cliente() {
return id_cliente.get();
}
public void setid_cliente(Integer id_cliente) {
this.id_cliente=new SimpleIntegerProperty (id_cliente);
}
}
id一直在读取,我发现无法截断或传递Localdate和Date之间的数据,因此任何帮助都将真正有用。问候。
这里的所有错误:
javafx.fxml.LoadException:
/C:/Users/ROA%20PC/eclipse-workspace/Conexion/bin/application/Vista.fxml
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at application.Main.start(Main.java:23)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.UnsupportedOperationException
at java.sql.Date.toInstant(Unknown Source)
at application.ConexionController.seleccionaregistros(ConexionController.java:190)
at application.ConexionController.initialize(ConexionController.java:92)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548)
... 17 more
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: Root cannot be null
at javafx.scene.Scene.<init>(Scene.java:336)
at javafx.scene.Scene.<init>(Scene.java:235)
at application.Main.start(Main.java:27)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
... 1 more
Exception running application application.Main
答案 0 :(得分:0)
java.sql.Date是一个不包含时间信息的java.util.Date子类,因此您无法将其转换为Instant类。
幸运的是,有一个toLocalDate方法可以做到这一点,将其直接转换为LocalDate。
应该是这样的:
rs.getDate(4).toLocalDate();
有关更多信息,请查看JavaDoc https://docs.oracle.com/javase/8/docs/api/java/sql/Date.html#toInstant--