我一直在寻找答案，但我仍然无法找到正确的方法（或者可能是我的代码中的错误）。我正在使用javafx和scenebuilder。 mySQL是我正在使用的数据库。请帮助:(
package cedproject;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.AnchorPane;
import java.sql.*;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Group;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;
/**
* FXML Controller class
*
* @author My Lightstream
*/
public class FXMLController implements Initializable {
public java.sql.PreparedStatement ps;
public java.sql.ResultSet rs;
@FXML
private AnchorPane donationWindow;
//@FXML
//private TableView<?> tblView;
@FXML
TableView<userdata> tblView= new TableView<>();
@FXML
private TableColumn<?, ?> colOR;
@FXML
private TableColumn<?, ?> colAmount;
@FXML
private Button btnNew;
@FXML
private TextField txtSearch;
private static java.sql.Connection con;
private static Statement stat;
private PreparedStatement prep;
private ObservableList<userdata> data;
@FXML
private Button btnLoad;
@FXML
private Group gp;
// </userdata>
/**
@FXML
private Button btnNew;
@FXML
private AnchorPane donationWindow;
/**
* Initializes the controller class.
*/
@Override
public void initialize(URL url, ResourceBundle rb) {
try{
ps = new Connect().connectDatabase();
ps.execute();
tblView.getItems().setAll(this.data);
}catch(Exception e){
}
lagay();
}
public void lagay(){
try{
String query = "select * from receipt";
tblView.getItems().clear();
ps = con.prepareStatement("select * from receipt");
rs = ps.executeQuery(query);
}catch(Exception e){
System.out.println("mali ka shunga");
}
ObservableList<userdata> data = FXCollections.observableArrayList();
try{
while(rs.next()){
data.add(new userdata(
rs.getInt("ORNUM"),
rs.getInt("AMOUNT")
));}
}catch(Exception e){}
}
public void tableView()throws Exception{
tblView.getItems().clear();
rs = ps.executeQuery("SELECT ORNUM,AMOUNT FROM RECEIPT");
ObservableList<userdata> data = FXCollections.observableArrayList();
TableColumn column1 = new TableColumn("ORNUM");
column1.setCellValueFactory(new javafx.scene.control.cell.PropertyValueFactory<>("ornum"));
TableColumn column2 = new TableColumn("Amount");
column2.setCellValueFactory(new javafx.scene.control.cell.PropertyValueFactory<>("amount"));
tblView.getColumns().addAll(column1,column2);
tblView.getChildrenUnmodifiable();
}
@FXML
public void handleButtonAction2(ActionEvent event) {
}
@FXML
public void activated(MouseEvent event) {
}
private void onClicked(ActionEvent event) throws SQLException {
/* tblView.getItems().clear();
rs = ps.executeQuery("SELECT ORNUM,AMOUNT FROM RECEIPT");
ObservableList<userdata> data = FXCollections.observableArrayList();
TableColumn column1 = new TableColumn("ORNUM");
column1.setCellValueFactory(new PropertyValueFactory<>("ORNUM"));
TableColumn column2 = new TableColumn("Amount");
column2.setCellValueFactory(new PropertyValueFactory<>("Amount"));
tblView.getColumns().addAll(column1,column2);*/
ObservableList<userdata> data = FXCollections.observableArrayList();
try{ String query = "select * from receipt";
tblView.getItems().clear();
ps = con.prepareStatement(query);
rs = ps.executeQuery("SELECT * from receipt");
while(rs.next()){
tblView.getItems().add(new userdata(
rs.getInt("ORNUM"),
rs.getInt("AMOUNT")
));
tblView.setItems(data);
}
ps.close();
rs.close();
}catch(Exception e){
}
}
@FXML
private void onClicked(MouseEvent event) throws Exception {
System.out.println("gawin mo");
ObservableList<userdata> data = FXCollections.observableArrayList();
System.out.println("ginawa");
tableView();
try{
String query = "select * from receipt";
tblView.getItems().clear();
ps = new Connect().connectDatabase();
ps = new Connect().connectDatabase();
rs = ps.executeQuery(query);
while(rs.next()){
tblView.getItems().add(new userdata(
rs.getInt("ORNUM"),
rs.getInt("AMOUNT")
));
tblView.setItems(data);
}
}catch(Exception e){
System.out.print("asdqweasd");
}
}
/**
*
* @param event
*/
/* @FXML
public void konekplis(SortEvent<C> event) {
}*/
}
package cedproject;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
/**
*enter code here
* @author My Lightstream
*/
public class userdata {
public SimpleIntegerProperty Ornum;
public SimpleIntegerProperty Amount;
public userdata(Integer ornum, Integer amount) {
this.Ornum = new SimpleIntegerProperty(ornum);
this.Amount = new SimpleIntegerProperty(amount);
}
userdata(String string) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
userdata(String string, String string0, String string1, String string2, String string3, String string4) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
public Integer getOrnum() {
return Ornum.get();
}
public Integer getAmount() {
return Amount.get();
}
public void setOrnum(Integer ornum) {
this.Ornum.set(ornum);
}
public void setAmount(Integer amount) {
this.Amount.set(amount);
}
}
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.effect.*?>
<?import java.lang.*?>
<?import java.net.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" fx:id="donationWindow" onDragDetected="#activated" prefHeight="482.0" prefWidth="696.0" styleClass="mainFxmlClass" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="cedproject.FXMLController">
<stylesheets>
<URL value="@fxml.css" />
</stylesheets>
<children>
<AnchorPane layoutY="8.0" prefHeight="482.0" prefWidth="696.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<TableView fx:id="tblView" layoutX="21.0" layoutY="87.0" prefHeight="181.0" prefWidth="655.0">
<columns>
<TableColumn fx:id="colOR" prefWidth="326.0" text="OR Number" />
<TableColumn fx:id="colAmount" prefWidth="325.0" text="Amount" />
</columns>
</TableView>
<Button fx:id="btnNew" layoutX="500.0" layoutY="35.0" mnemonicParsing="false" onAction="#handleButtonAction2" prefHeight="25.0" prefWidth="78.0" text="NEW" />
<Button layoutX="587.0" layoutY="35.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="78.0" text="EDIT" />
<TextField fx:id="txtSearch" layoutX="40.0" layoutY="35.0" prefHeight="25.0" prefWidth="204.0" promptText="Search" />
<TextArea editable="false" layoutX="19.0" layoutY="336.0" prefHeight="132.0" prefWidth="655.0">
<effect>
<DropShadow height="14.0" radius="6.5" width="14.0" />
</effect>
</TextArea>
<Label layoutX="26.0" layoutY="305.0" prefHeight="17.0" prefWidth="68.0" text="Description:" />
<Button fx:id="btnLoad" layoutX="424.0" layoutY="35.0" mnemonicParsing="false" onMouseClicked="#onClicked" prefHeight="25.0" prefWidth="68.0" text="Load" />
<Group fx:id="gp" />
</children>
<cursor>
<Cursor fx:constant="DEFAULT" />
</cursor>
</AnchorPane>
</children>
</AnchorPane>
请帮助:(