java數組轉為以逗号分隔的字元串

/**
	 * 将數組轉換成以逗号分隔的字元串
	 * 
	 * @param needChange
	 *            需要轉換的數組
	 * @return 以逗号分割的字元串
	 */
	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();
	}