使用数据库数据填充jTable

因此，您需要某种方式“告知”模型已加载的表。您可以使用侦听器回叫机制，但是使用a可能更容易

SwingWorker

这将允许您在后台线程中对数据库进行调用，并在完成后从EDT中更新UI。

import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.ResultSetmetaData;import java.util.Vector;import java.util.concurrent.ExecutionException;import java.util.logging.Level;import java.util.logging.Logger;import javax.swing.JTable;import javax.swing.SwingWorker;import javax.swing.table.DefaultTableModel;import javax.swing.table.TableModel;import sun.applet.Main;public class DataLoadWorker extends SwingWorker<TableModel, TableModel> {    private final JTable table;    public DataLoadWorker(JTable table) {        this.table = table;    }    @Override    protected TableModel doInBackground() throws Exception {        Vector data = new Vector();        Vector columns = new Vector();        PreparedStatement ps = null;        ResultSet rs = null;        try { String stmt = "SELECt * FROM APP.DATAVAULT"; ps = Main.getPreparedStatement(stmt); rs = ps.executeQuery(); ResultSetmetaData md = rs.getmetaData(); int columnCount = md.getColumnCount(); //store column names   for (int i = 1; i <= columnCount; i++) {     columns.add(md.getColumnName(i)); } columns.ensureCapacity(columnCount); Vector row; while (rs.next()) {     row = new Vector(columnCount);     for (int i = 1; i <= columnCount; i++) {         row.add(rs.getString(i));     }     data.add(row);     //Debugging      } // List.setModel(tableModel);        } finally { try {     ps.close(); } catch (Exception e) { } try {     rs.close(); } catch (Exception e) { }        }        DefaultTableModel tableModel = new DefaultTableModel(data, columns);        return tableModel;    }    @Override    protected void done() {        try { TableModel model = get(); table.setModel(model);        } catch (InterruptedException | ExecutionException ex) { ex.printStackTrace();        }    }}

你的榜样也行不通。

该

Vector

columns

data

try-catch

DefaultTableModel tableModel = newDefaultTableModel(data, columns);

至少应该转储任何异常的堆栈跟踪，这将帮助您找到实际错误的位置，因此

System.out.println(e.getMessage());

e.printStackTrace();

Logger

log4j

您也是资源，也就是说，如果打开，则应将其关闭。当您调用

ps.close()

rs.close()

将它们添加到

finally

try-catch