将集合转换成指定分隔符和前后缀的字符串

	public static String collectionToDelimitedString(Collection<?> coll, String delim, String prefix, String suffix) {
		if (CollectionUtils.isEmpty(coll)) {
			return "";
		}
		StringBuilder sb = new StringBuilder();
		Iterator it = coll.iterator();
		while (it.hasNext()) {
			sb.append(prefix).append(it.next()).append(suffix);
			if (it.hasNext())
				;
			sb.append(delim);
		}

		return sb.toString();
	}