我一直在尝试使用从数据库中查询的数据加载TableView,但似乎无法使其工作。
这是我尝试使用数据库查询项填充数据库的第一次尝试,以防我的代码看起来很糟糕且远非好用。
FXML是通过JavaFx SceneBuilder完成的。
这是数据库查询类:
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
}
}
}
这是通过JavaFx场景构建器生成的FXML脚本:
<?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>
答案 0 :(得分:14)
以下是从tableView中填充数据的最佳解决方案。
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();
}
}
以下是Reference
谢谢..
答案 1 :(得分:1)
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;
}
答案 2 :(得分:0)
如果数据库包含不同类型的数据,不仅是字符串,那么列类型的分配最好使其动态:
@model WebApplication1.Models.Class1
@{
ViewBag.Title = "Index1";
}
<br />
@Html.DropDownListFor(m => m.psudetail, new SelectList(Model.psudetail, "S_no", "Section_PSU"), "--Select PSU--")
在此示例中,SQL数据库“ sqlbase_schema”包含具有三列的表“ sqlbase_table”:“ id”(Integer(INT(11))),“ name”(String(VARCHAR(45))),“已结婚( Boolean(TINYINT(1)));