Javafx dynamically populate table rows and columnheads from sql query [duplicate] - javafx

Question

I've been trying to load a TableView with data queried from a database, but can't seem to get it to work.
This is my first attempt at trying to populate a TableView with database query items – in case my code seems mungled and far from good.
The FXML was done via JavaFX SceneBuilder.
This is the database query class:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.scene.control.TableView;
public class StudentInfo {
static String JDBC_DRIVER = "org.h2.Driver";
static String DB_URL = "jdbc:h2:file:C:/WAKILI/WAKILIdb";
// Database credentials
static final String USER = "sa";
static final String PASS = "";
public static Connection conn = null;
#FXML
private TableView<StudentInfo> lovelyStudents;
private ObservableList data;
// Public static ObservableList<COA> getAllCOA(){
public void getAllstudentInfo() {
Statement st = null;
ResultSet rs;
String driver = "org.h2.Driver";
try {
Class.forName(driver);
conn = DriverManager.getConnection(DB_URL, USER, PASS);
st = conn.createStatement();
String recordQuery = ("SELECT id, KIWI FROM KIWI");
rs = st.executeQuery(recordQuery);
while (rs.next()) {
ObservableList row = FXCollections.observableArrayList();
for (int i = 1; i <= rs.getMetaData().getColumnCount(); i++) {
row.add(rs.getString(i));
System.out.println(row);
}
data.add(row);
}
lovelyStudents.setItems(data);
} catch (ClassNotFoundException | SQLException ex) {
// CATCH SOMETHING
}
}
}
This is the FXML script generated via JavaFX scene builder:
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="400.0" prefWidth="700.0" xmlns:fx="http://javafx.com/fxml" fx:controller="wakiliproject.SampleController">
<children>
<TableView prefHeight="400.0" prefWidth="700.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columns>
<TableColumn prefWidth="75.0" text="Column X" />
</columns>
</TableView>
</children>
</AnchorPane>

Answer 1

Here is the best solution for the filling data to the tableView From the database.
import java.sql.Connection;
import java.sql.ResultSet;
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellDataFeatures;
import javafx.scene.control.TableView;
import javafx.stage.Stage;
import javafx.util.Callback;
/**
*
* #author Narayan
*/
public class DynamicTable extends Application{
//TABLE VIEW AND DATA
private ObservableList<ObservableList> data;
private TableView tableview;
//MAIN EXECUTOR
public static void main(String[] args) {
launch(args);
}
//CONNECTION DATABASE
public void buildData(){
Connection c ;
data = FXCollections.observableArrayList();
try{
c = DBConnect.connect();
//SQL FOR SELECTING ALL OF CUSTOMER
String SQL = "SELECT * from CUSTOMer";
//ResultSet
ResultSet rs = c.createStatement().executeQuery(SQL);
/**********************************
* TABLE COLUMN ADDED DYNAMICALLY *
**********************************/
for(int i=0 ; i<rs.getMetaData().getColumnCount(); i++){
//We are using non property style for making dynamic table
final int j = i;
TableColumn col = new TableColumn(rs.getMetaData().getColumnName(i+1));
col.setCellValueFactory(new Callback<CellDataFeatures<ObservableList,String>,ObservableValue<String>>(){
public ObservableValue<String> call(CellDataFeatures<ObservableList, String> param) {
return new SimpleStringProperty(param.getValue().get(j).toString());
}
});
tableview.getColumns().addAll(col);
System.out.println("Column ["+i+"] ");
}
/********************************
* Data added to ObservableList *
********************************/
while(rs.next()){
//Iterate Row
ObservableList<String> row = FXCollections.observableArrayList();
for(int i=1 ; i<=rs.getMetaData().getColumnCount(); i++){
//Iterate Column
row.add(rs.getString(i));
}
System.out.println("Row [1] added "+row );
data.add(row);
}
//FINALLY ADDED TO TableView
tableview.setItems(data);
}catch(Exception e){
e.printStackTrace();
System.out.println("Error on Building Data");
}
}
#Override
public void start(Stage stage) throws Exception {
//TableView
tableview = new TableView();
buildData();
//Main Scene
Scene scene = new Scene(tableview);
stage.setScene(scene);
stage.show();
}
}
Here is the Reference
Thanks..

Answer 2

If Database contains different types of data, not only String, then column type assigning is better to make dynamic:
package sample;
import javafx.application.Application;
import javafx.beans.property.*;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Stage;
import java.sql.*;
import java.util.ArrayList;
import java.util.TimeZone;
//Author: Yerbol
//SQL database "sqlbase_schema" contains a Table "sqlbase_table" with 3 columns: "id" (Integer(INT(11))), "name" (String(VARCHAR(45))), "married" (Boolean(TINYINT(1)));
public class Main extends Application {
private TableView<Person> tableView = new TableView<>();
#Override
public void start(Stage primaryStage) throws SQLException, ClassNotFoundException {
//Show window
buildData();
Parent root = tableView;
primaryStage.setScene(new Scene(root, 300, 275));
primaryStage.show();
}
public void buildData() throws ClassNotFoundException, SQLException {
Connection dbConnection;
//SQL Database connection params
String dbHost = "localhost";
String dbPort = "3306";
String dbUser = "root";
String dbPassword = "12345";
String dbName = "sqlbase_schema";
String dbTableName = "sqlbase_table";
String select = "SELECT * FROM " + dbTableName;
String connectionString = "jdbc:mysql://" + dbHost + ":" + dbPort +"/" + dbName+"?useLegacyDatetimeCode=false&amp&serverTimezone=" + TimeZone.getDefault().getID();
Class.forName("com.mysql.cj.jdbc.Driver");
//Connecting to Database
dbConnection = DriverManager.getConnection(connectionString, dbUser, dbPassword);
//Extracting data from Databasee
ResultSet resultSet = null;
try {
PreparedStatement preparedStatement = dbConnection.prepareStatement(select);
resultSet = preparedStatement.executeQuery();
} catch (SQLException e) {
e.printStackTrace();
}
ObservableList dbData = FXCollections.observableArrayList(dataBaseArrayList(resultSet));
//Giving readable names to columns
for(int i=0 ; i<resultSet.getMetaData().getColumnCount(); i++) {
TableColumn column = new TableColumn<>();
switch (resultSet.getMetaData().getColumnName(i+1)) {
case "id":
column.setText("ID #");
break;
case "name":
column.setText("Person Name");
break;
case "married":
column.setText("Marital Status");
break;
default: column.setText(resultSet.getMetaData().getColumnName(i+1)); //if column name in SQL Database is not found, then TableView column receive SQL Database current column name (not readable)
break;
}
column.setCellValueFactory(new PropertyValueFactory<>(resultSet.getMetaData().getColumnName(i+1))); //Setting cell property value to correct variable from Person class.
tableView.getColumns().add(column);
}
//Filling up tableView with data
tableView.setItems(dbData);
}
public class Person {
IntegerProperty id = new SimpleIntegerProperty(); //variable names should be exactly as column names in SQL Database Table. In case if you want to use <int> type instead of <IntegerProperty>, then you need to use getter/setter procedures instead of xxxProperty() below
StringProperty name = new SimpleStringProperty();
BooleanProperty married = new SimpleBooleanProperty();
public IntegerProperty idProperty() { //name should be exactly like this [IntegerProperty variable name (id) + (Property) = idProperty] (case sensitive)
return id;
}
public StringProperty nameProperty() {
return name;
}
public BooleanProperty marriedProperty() {
return married;
}
public Person(int idValue, String nameValue, boolean marriedValue) {
id.set(idValue);
name.set(nameValue);
married.set(marriedValue);
}
Person(){}
}
//extracting data from ResulSet to ArrayList
private ArrayList dataBaseArrayList(ResultSet resultSet) throws SQLException {
ArrayList<Person> data = new ArrayList<>();
while (resultSet.next()) {
Person person = new Person();
person.id.set(resultSet.getInt("id"));
person.name.set(resultSet.getString("name"));
person.married.set(resultSet.getBoolean("married"));
data.add(person);
}
return data;
}
public static void main(String[] args) {
launch(args);
}
}
In this example SQL database "sqlbase_schema" contains a Table "sqlbase_table" with 3 columns: "id" (Integer(INT(11))), "name" (String(VARCHAR(45))), "married (Boolean(TINYINT(1)));

Answer 3

public TableView queryToTable(String sql) {
TableView result = new TableView();
ObservableList data = FXCollections.observableArrayList();
jdbcTemplate.query(sql, (rs)->{
for(int i=0 ; i<rs.getMetaData().getColumnCount(); i++){
final int j = i;
TableColumn col = new TableColumn(rs.getMetaData().getColumnName(i+1));
col.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList,String>,ObservableValue<String>>(){
public ObservableValue<String> call(TableColumn.CellDataFeatures<ObservableList, String> param) {
return new SimpleStringProperty(param.getValue().get(j).toString());
}
});
result.getColumns().addAll(col);
}
while(rs.next()){
ObservableList<String> row = FXCollections.observableArrayList();
for(int i=1 ; i<=rs.getMetaData().getColumnCount(); i++)
row.add(rs.getString(i));
data.add(row);
}
return null;
});
return result;
}