Map key大小写转换

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public class MapUtil {

public static Map<String, Object> keyToLowerCase(Map<String, Object> orgMap) {
    Map<String, Object> resultMap = new HashMap<>();

    if (orgMap == null || orgMap.isEmpty()) {
        return resultMap;
    }

    Set<Map.Entry<String,Object>> entrySet = orgMap.entrySet();
    for (Map.Entry<String, Object> entry : entrySet) {
        String key = entry.getKey();
        Object value = entry.getValue();
        resultMap.put(key.toLowerCase(), value);
    }

    return resultMap;
}

public static Map<String, Object> keyToUpperCase(Map<String, Object> orgMap) {
    Map<String, Object> resultMap = new HashMap<>();

    if (orgMap == null || orgMap.isEmpty()) {
        return resultMap;
    }

    Set<Map.Entry<String,Object>> entrySet = orgMap.entrySet();
    for (Map.Entry<String, Object> entry : entrySet) {
        String key = entry.getKey();
        Object value = entry.getValue();
        resultMap.put(key.toUpperCase(), value);
    }

    return resultMap;
}

}