rs = stmt.executeQuery(strsql);
ResultSetMetaData rsmd = rs.getMetaData();
int count = rsmd.getColumnCount();
for (int i = 1; i <= count; i++)
{
list.add(new String[] { rsmd.getColumnName(i),rsmd.getColumnTypeName(i),Integer.toString(rsmd.isNullable(i))});
}