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我有一个正在由ResultSet填充的JTable。有什么方法可以计算特定列的总和并将其添加到同一个表的最后一行?JTable计算列总和
public static DefaultTableModel buildTableModel(ResultSet rs)
throws SQLException {
ResultSetMetaData metaData = rs.getMetaData();
// names of columns
Vector<String> columnNames = new Vector<String>();
int columnCount = metaData.getColumnCount();
for (int column = 1; column <= columnCount; column++) {
columnNames.add(metaData.getColumnName(column));
}
// data of the table
Vector<Vector<Object>> data = new Vector<Vector<Object>>();
while (rs.next()) {
Vector<Object> vector = new Vector<Object>();
for (int columnIndex = 1; columnIndex <= columnCount; columnIndex++) {
vector.add(rs.getObject(columnIndex));
}
data.add(vector);
}
return new DefaultTableModel(data, columnNames);
}
public static void main(String[] args) throws Exception {
// The Connection is obtained
ResultSet rs = stmt.executeQuery("select * from product_info");
// It creates and displays the table
JTable table = new JTable(buildTableModel(rs));
// Closes the Connection
JOptionPane.showMessageDialog(null, new JScrollPane(table));
}
如果有一个名为qty的列是否有一种方法可以在表的底部获取总数?
你能分享你到目前为止的代码? – Mureinik
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