[英]How can i save the data from the cell after editing in jTable(autosave)?
I have a JTable which is populated with data from a vector and I want it to be autosaved in the database after editing the data. 我有一个JTable,其中填充了来自矢量的数据,我希望在编辑数据后将其自动保存在数据库中。
Vector columnNames = new Vector();
Vector data = new Vector();
Connection conn = dbConnect.connect();
String sql = "Select date, frequency, type, payeereceivee, amount, comments from schedule where date ='" + outputdate + "'";
Statement statement = conn.createStatement();
ResultSet resultSet = statement.executeQuery(sql);
ResultSetMetaData metaData = resultSet.getMetaData();
int columns = metaData.getColumnCount();
for (int i = 1; i <= columns; i++) {
columnNames.addElement(metaData.getColumnName(i));
}
while (resultSet.next()) {
Vector row = new Vector(columns);
for (int i = 1; i <= columns; i++) {
row.addElement(resultSet.getObject(i));
}
data.addElement(row);
}
resultSet.close();
statement.close();
tbl = new JTable(data, columnNames);
TableColumn column;
for (int i = 0; i < tbl.getColumnCount(); i++) {
column = tbl.getColumnModel().getColumn(i);
column.setMaxWidth(250);
}
What is meant by the comments above is to create your own TableModel
(for example by extending DefaultTableModel
) and override/implement setValueAt
to update the DB. 上面的注释意味着创建自己的
TableModel
(例如,通过扩展DefaultTableModel
)并重写/实现setValueAt
以更新数据库。
See the snippet below for that matter. 请参阅下面的代码段。 Make sure that you don't perform the DB-update on the EDT (Event Dispatching Thread, if you are unaware of what it is, check out "concurrency in Swing"), by using a
SwingWorker
for example. 请确保您不要在EDT执行DB更新(事件指派线程,如果你不知道它是什么,看看“Swing中的并发”),通过使用
SwingWorker
的例子。
import java.awt.BorderLayout;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
public class TestTable2 {
protected void initUI() {
Vector<String> columnNames = new Vector<String>();
Vector<Vector<Object>> data = new Vector<Vector<Object>>();
Connection conn = dbConnect.connect();
String sql = "Select date, frequency, type, payeereceivee, amount, comments from schedule where date ='" + outputdate + "'";
Statement statement = conn.createStatement();
ResultSet resultSet = statement.executeQuery(sql);
ResultSetMetaData metaData = resultSet.getMetaData();
int columns = metaData.getColumnCount();
for (int i = 1; i <= columns; i++) {
columnNames.addElement(metaData.getColumnName(i));
}
while (resultSet.next()) {
Vector row = new Vector(columns);
for (int i = 1; i <= columns; i++) {
row.addElement(resultSet.getObject(i));
}
data.addElement(row);
}
resultSet.close();
statement.close();
JTable tbl = new JTable(new DefaultTableModel(data, columnNames) {
@Override
public void setValueAt(Object aValue, int row, int column) {
// Here update DB with a SwingWorker and the new provided value
super.setValueAt(aValue, row, column);
}
});
TableColumn column;
for (int i = 0; i < tbl.getColumnCount(); i++) {
column = tbl.getColumnModel().getColumn(i);
column.setMaxWidth(250);
}
JFrame frame = new JFrame(TestTable2.class.getSimpleName());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JScrollPane scrollpane = new JScrollPane(tbl);
frame.add(scrollpane, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
UnsupportedLookAndFeelException {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TestTable2().initUI();
}
});
}
}
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