java数组转为以逗号分隔的字符串

/**
	 * 将数组转换成以逗号分隔的字符串
	 * 
	 * @param needChange
	 *            需要转换的数组
	 * @return 以逗号分割的字符串
	 */
	public static String arrayToStrWithComma(String[] needChange) {
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < needChange.length; i++) {
			sb.append(needChange[i]);
			if ((i + 1) != needChange.length) {
				sb.append(",");
			}
		}
		return sb.toString();
	}