TextUtils

	/**
	 * 计算关键字在文本中出现的次数
	 * @param text
	 * @param key
	 * @return
	 */
	public static int count(String text, String key) {
		int count = 0, start = 0;
		while ((start = text.indexOf(key, start)) >= 0) {
			start += key.length();
			count++;
		}
		return count;
	}