import java.util.*;

/**
 * 描述:
 *
 * @author LingCoder
 * @version 1.0
 * @description TODO
 * @date 2018/11/13 15:41
 */
public class MapUnderline2Hump {
    /**
     * 將Map中的key由下劃線轉換為駝峰
     *
     * @param map
     * @return
     */
    public static Map<String, Object> formatHumpName(Map<String, String> map) {
        Map<String, Object> newMap = new HashMap<String, Object>();
        Iterator<Map.Entry<String, String>> it = map.entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry<String, String> entry = it.next();
            String key = entry.getKey();
            String newKey = toFormatCol(key);
            newMap.put(newKey, entry.getValue());
        }
        return newMap;
    }

    public static String toFormatCol(String colName) {
        StringBuilder sb = new StringBuilder();
        String[] str = colName.toLowerCase().split("_");
        int i = 0;
        for (String s : str) {
            if (s.length() == 1) {
                s = s.toUpperCase();
            }
            i++;
            if (i == 1) {
                sb.append(s);
                continue;
            }
            if (s.length() > 0) {
                sb.append(s.substring(0, 1).toUpperCase());
                sb.append(s.substring(1));
            }
        }
        return sb.toString();
    }

    /**
     * 將List中map的key值命名方式格式化為駝峰
     *
     * @param
     * @return
     */
    public static List<Map<String, Object>> formatHumpNameForList(List<Map<String, String>> list) {
        List<Map<String, Object>> newList = new ArrayList<Map<String, Object>>();
        for (Map<String, String> o : list) {
            newList.add(formatHumpName(o));
        }
        return newList;
    }

}