/**

	 * 格式化字符串

	 */

	static String dataFormat(String data){

		String formatedData = "";

		// 浮点数正则表达式

		Pattern pattern = Pattern.compile("^(-?\\d+)(\\.\\d+)?$");

		if(data == null) return null;

		else {

			if(data.equals("")) formatedData = "";

			else if(!data.contains(",")){

				try {

					formatedData += new BigDecimal(data).setScale(2, BigDecimal.ROUND_HALF_UP);

				} catch (Exception e) {

					// 排除数据错误的情况 比如“-” “null”类型的

					formatedData += data;

				}

			} else{

				while(data.length() != 0){

					int position = data.indexOf(",");

					if(data.indexOf(",") != -1){

						String tempString = data.substring(0, position);

						if(pattern.matcher(tempString).matches() ){

							formatedData += new BigDecimal(tempString).setScale(2, BigDecimal.ROUND_HALF_UP);

							formatedData += ",";

							data = data.substring(position + 1);

						}else if (tempString.equals("")) {

							formatedData += ",";

							data = data.substring(position + 1);

						}else{

							return "格式不正确";

						}

					}else{

						// 最后一个值

						formatedData += new BigDecimal(data).setScale(2, BigDecimal.ROUND_HALF_UP);

						formatedData += ",";

						data = "";

					}

				}

			}

		}

		return formatedData;

	}