您好，当我使用按钮mostrar显示记录时，所有记录都会显示，但是当我使用按钮agregar添加新记录时，该按钮不显示记录，那是什么？我做错了吗？该方法不错，但是似乎tableview中看不到最后一条记录，这是我的代码，请帮助。
班级
package application;
import javafx.collections.*;
import java.net.URL;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ResourceBundle;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.*;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.input.MouseEvent;
public class Mostraregistros implements Initializable {
ObservableList <cliente> data =FXCollections.observableArrayList();
@FXML TableView<cliente> tablacliente;
@FXML TableColumn<cliente, String> nombrescol;
@FXML TableColumn<cliente,String > apellidoscol;
@FXML TableColumn<cliente, Integer> clienteid;
@FXML private Button mtn;
@Override
public void initialize(URL arg0, ResourceBundle arg1) {
mtn.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
Alert alert = new Alert(AlertType.INFORMATION);
alert.setTitle("Informacion");
alert.setHeaderText(null);
alert.setContentText("Mostrando Todos los Registros");
alert.showAndWait();
nombrescol.setCellValueFactory(new PropertyValueFactory <cliente, String>("nombres"));
apellidoscol.setCellValueFactory(new PropertyValueFactory <cliente, String>("apellidos"));
clienteid.setCellValueFactory(new PropertyValueFactory <cliente, Integer>("id_cliente"));
tablacliente.setItems(data);
}
});
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 cliente(
rs.getString("nombre"),
rs.getString("apellido"),
rs.getInt("id")
));
}
if(conn!=null)
System.out.println("conexion exitosa");
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
fxml代码
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.cell.*?>
<?import application.cliente.*?>
<?import application.Mostraregistros.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane prefHeight="634.0" prefWidth="626.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.ConexionSQL">
<children>
<Pane layoutX="5.0" layoutY="1.0" prefHeight="581.0" prefWidth="977.0">
<children>
<TextField fx:id="nm" layoutX="125.0" layoutY="70.0" prefHeight="32.0" prefWidth="205.0" text="nombres" />
<TextField fx:id="ap" layoutX="125.0" layoutY="133.0" prefHeight="32.0" prefWidth="205.0" text="apellidos" />
<Label layoutX="27.0" layoutY="70.0" prefHeight="32.0" prefWidth="137.0" text="NOMBRES" />
<Button fx:id="btn" layoutX="21.0" layoutY="216.0" mnemonicParsing="false" onAction="#btn" prefHeight="43.0" prefWidth="84.0" text="AGREGAR" />
<Label layoutX="27.0" layoutY="141.0" text="APELLIDOS" />
<TableView fx:id="tablacliente" layoutX="346.0" layoutY="47.0" prefHeight="448.0" prefWidth="553.0">
<columns>
<TableColumn fx:id="clienteid" prefWidth="225.0" text="CLIENTE ID"/>
<TableColumn fx:id="nombrescol" prefWidth="206.0" text="NOMBRES"/>
<TableColumn fx:id="apellidoscol" prefWidth="161.0" text="APELLIDOS"/>
</columns>
</TableView>
<Button fx:id="mtn" layoutX="138.0" layoutY="216.0" mnemonicParsing="false" prefHeight="43.0" prefWidth="144.0" text="MOSTRAR REGISTROS" />
</children>
</Pane>
</children>
</AnchorPane>
这是agregar按钮代码和insert代码
package application;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.scene.control.*;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.input.MouseEvent;
public class ConexionSQL extends Mostraregistros{
@FXML private TextField nm;
@FXML private TextField ap;
@FXML private Button btn;
@FXML
private void btn(ActionEvent event) {
btn.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
Alert alert = new Alert(AlertType.INFORMATION);
alert.setTitle("Informacion");
alert.setHeaderText(null);
alert.setContentText("Registro Insertado Exitosamente");
alert.showAndWait();
}
});
Connection conn=null;
try {
conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=prueba", "sa", "milkas87");
Statement insertar=conn.createStatement();
insertar.executeUpdate("insert into cliente (nombre, apellido) values ('"+nm.getText()+"', '"+ap.getText()+"')");
if(conn!=null)
System.out.println("conexion exitosa");
} catch (SQLException e) {
e.printStackTrace();
}
}
}
这是cliente class
package application;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
public class cliente{
private StringProperty nombres;
private StringProperty apellidos;
private IntegerProperty id_cliente;
public cliente ( String nombres, String apellidos, Integer id_cliente) {
this.nombres= new SimpleStringProperty (nombres);
this.apellidos= new SimpleStringProperty ( apellidos);
this.id_cliente=new SimpleIntegerProperty (id_cliente);
}
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);
}
}