public List<StockInfo> findLimitUpStocksOn(String date) {
List<StockInfo> list = new ArrayList<>();
for (Map.Entry<String, List<StockInfo>> entry : cache.entrySet()) {
for (StockInfo stock : entry.getValue()) {
if (stock.getTradeDate().equals(date) && stock.isLimitUp()) {
list.add(stock);
}
}
}
return list;
}
