0
我一直在寻找现在的答案。编辑单元格后编辑/更新JTable
我有一个JTable，用来自本地SQLite-DB的数据填充。
现在这里的目标是，用户选择单元格（1 -max。available），编辑单元格并在Jtable中看到他的输入。此外，我想为SQL语句保存这个输入。
现在，当用户输入并离开单元格时，我停留在该点上。 我没有得到JTable来显示更改。
我试图重绘，我试过TableModelListener，但没有成功。 JTable保持不变。 这可能不是一个大问题。但我可以在这里使用一些帮助。 如何达到显示更新的JTable（包括用户输入）的目标？
package views;
import java.awt.EventQueue;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.WindowConstants;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import main.DatenHolen;
public class GUI extends JFrame {
private static final long serialVersionUID = 1L;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new GUI().setVisible(true);
}
});
}
private JButton btLoad;
public JTable table;
final static String DB_PATH = "C:\\DB.db"; //
private JButton btnDBNeuSpeichern;
private JButton btnDatenbankVergleich;
private JButton btnAusgewhlteDateienLoeschen;
private JButton btnZuLoeschendeDateien;
public GUI() throws HeadlessException {
createComponents(); //Formular und Bestandteile aufbauen
createEvents(); //Events und Logiken erstellen
}
private void createComponents() {
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(null);
btLoad = new JButton("Datenbank laden");
btLoad.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
loadData();
}
});
btLoad.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
}
});
btLoad.setBounds(537, 25, 183, 28);
getContentPane().add(btLoad);
btnDBNeuSpeichern = new JButton("Laufwerke neu in DB laden");
btnDBNeuSpeichern.setBounds(537, 65, 183, 28);
getContentPane().add(btnDBNeuSpeichern);
btnDatenbankVergleich = new JButton("Datenbank mit bisheriger vergleichen");
btnDatenbankVergleich.setBounds(537, 105, 273, 28);
getContentPane().add(btnDatenbankVergleich);
btnAusgewhlteDateienLoeschen = new JButton("Ausgewählte Dateien löschen");
btnAusgewhlteDateienLoeschen.setBounds(537, 145, 205, 28);
getContentPane().add(btnAusgewhlteDateienLoeschen);
btnZuLoeschendeDateien = new JButton("Zu löschende Dateien selektieren");
btnZuLoeschendeDateien.setBounds(537, 183, 205, 28);
getContentPane().add(btnZuLoeschendeDateien);
setSize(918, 850);
}
private void createEvents() {
btnDBNeuSpeichern.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
}
});
}
private void loadData() {
DatenHolen DBLaden = new DatenHolen(); // DBQuers-Object
table = new JTable(DBLaden.run(DB_PATH)); //DB_PATH is the SQLite-DB including path ; Method is returning TableModel and therefore populating the Jtable
table.getModel().addTableModelListener(new TableModelListener(){
@Override
public void tableChanged(TableModelEvent arg0) {
}
});
}
}
这里去我JTableModel级
package main;
import javax.swing.table.DefaultTableModel;
public class TableModelSpezial extends DefaultTableModel{
private static final long serialVersionUID = 1L;
public boolean isCellEditable(int rowIndex, int columnIndex)
{
return true; //falls Änderung auf eine Zeile beschränkt wird, zb 1. dann columnIndex==0;
}
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
System.out.println(aValue);
System.out.println(rowIndex);
System.out.println(columnIndex);
// fireTableCellUpdated(rowIndex, columnIndex);
}
}
// TableModel的& SQL_Build
package main;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.Vector;
import javax.swing.table.TableModel;
public class DatenHolen extends Thread{
public TableModelSpezial tableModel= new TableModelSpezial();
public TableModel run(String DB_PATH) {
try (Connection conn = DriverManager.getConnection("jdbc:sqlite:" + DB_PATH); //put up conn to db
Statement stmt = conn.createStatement()) {
ResultSet rs = stmt.executeQuery(" select* from dateien");
ResultSetMetaData metaData = rs.getMetaData();
// Names of columns
Vector<String> columnNames = new Vector<String>();
int columnCount = metaData.getColumnCount();
for (int i = 1; i <= columnCount; i++) { //Test 1=2, damit i=1 die Spaltennummerierung darstellt
columnNames.add(metaData.getColumnName(i));
}
// Data of the table
Vector<Vector<Object>> data = new Vector<Vector<Object>>();
while (rs.next()) {
Vector<Object> vector = new Vector<Object>();
for (int i = 1; i <= columnCount; i++) {
vector.add(rs.getObject(i));
}
data.add(vector);
System.out.println(vector);
}
tableModel.setDataVector(data, columnNames);
} catch (Exception e) {
e.printStackTrace();
}
return tableModel;
}
}
另请参阅https://docs.oracle.com/javase/tutorial/uiswing/components/table.html#modelchange – Fildor