/**
 * 數字校驗（正、負、小數）
 * @param s
 * @return
 */
public static boolean isNumeric(String s) {
	if (s != null && !"".equals(s.trim()))
		return s.matches("^-?\\d+(\\.\\d+)?$");
	else
		return false;
}

/**
 * List排序
 * @param resultList Map陣列
 * @param orderColumn 排序列名
 * @param isString 是否按字串排序，否則按數字排序
 * @param isAsc 是否正序
 * @throws Exception
 */
public static void listSort(List> resultList, final String orderColumn, final boolean isString,
		final boolean isAsc) throws Exception {
	// 返回的結果集
	Collections.sort(resultList, new Comparator>() {
		public int compare(Map o1, Map o2) {
			String s1 = StringUtils.getString(o1.get(orderColumn));
			String s2 = StringUtils.getString(o2.get(orderColumn));
			if (isString) {
				return s1.compareTo(s2) * (isAsc ? 1 : -1);
			} else {
				if (s1.equals(""))
					return isAsc ? -1 : 1;
				if (s2.equals(""))
					return isAsc ? 1 : -1;
				if (!isNumeric(s1) && !isNumeric(s2))
					return s1.compareTo(s2) * (isAsc ? 1 : -1);
				;
				if (!isNumeric(s1))
					return isAsc ? -1 : 1;
				if (!isNumeric(s2))
					return isAsc ? 1 : -1;
				return new BigDecimal(s1).compareTo(new BigDecimal(s2)) * (isAsc ? 1 : -1);
			}
		}
	});
}

public static void main(String[] args) throws Exception {
	List> list = new ArrayList>();

	Map map1 = new HashMap();
	Map map2 = new HashMap();
	Map map3 = new HashMap();
	Map map4 = new HashMap();
	Map map5 = new HashMap();

	map1.put("number", null);
	map2.put("number", "44a");
	map3.put("number", -3);
	map4.put("number", "36c");
	map5.put("number", 11.1234);
	list.add(map1);
	list.add(map2);
	list.add(map3);
	list.add(map4);
	list.add(map5);

	listSort(list, "number", false, false);

	System.out.println(list);
}