使用Java在jtable和数据库中添加行

String[] columnNames = {"列1", "列2", "列3"};
DefaultTableModel model = new DefaultTableModel(columnNames, 0);
JTable table = new JTable(model);

Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/database", "username", "password");
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery("SELECT * FROM table");

while (resultSet.next()) {
    Object[] rowData = {resultSet.getString("列1"), resultSet.getString("列2"), resultSet.getString("列3")};
    model.addRow(rowData);
}

resultSet.close();
statement.close();
connection.close();