public static String getCellTag(int column){
		if(column<0)
			throw new IllegalArgumentException("输入的列序列号不能小于0");
		StringBuilder tag = new StringBuilder();
		while (column > 25){
			column = (column%25)-1;
			tag.append(CELL_TAGS[column/25]);
		}
		tag.append(CELL_TAGS[column]);
		return tag.toString();
	}