怎么获取resultset对象中的所有列的名字？？

Question

ResultSet result = sta.executeQuery(sqlStr);
            ResultSetMetaData reMeta = result.getMetaData();
            int columnCount = reMeta.getColumnCount();
            HashMap signRecord = null;
            String columnName = null;
            while(result.next())
            {
                signRecord = new HashMap();
                for(int i=1;i<=columnCount;i++)
                {
                    columnName = reMeta.getColumnName(i);
                    signRecord.put(columnName,result.getObject(i));
                }
                resultList.add(signRecord);
            }
            result.close();