Java：将map中的key转化为小写

public static Map<String, Object> transformUpperCase(Map<String, Object> orgMap) { Map<String, Object> resultMap = new HashMap<>(); if (orgMap == null || orgMap.isEmpty()) { return resultMap; } Set<String> keySet = orgMap.keySet(); for (String key : keySet) { String newKey = key.toLowerCase(); newKey = newKey.replace("_", ""); resultMap.put(newKey, orgMap.get(key)); } return resultMap;