/**
	 * 从流对象解析出字符串内容
	 * @param inputStream
	 * @return str
	 */
	private String getStrContent(ServletInputStream inputStream) {
		if (inputStream == null) {
			return "";
		}
		String str = "";
		StringBuilder sb = new StringBuilder();
		String line;
		try {
			BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
			while ((line = br.readLine()) != null) {
			    sb.append(line);
			}
			str = sb.toString();
			System.out.println("content = "+str );
		} catch (IOException e) {
			logger.info("接收佳付通返回的异步支付结果通知  从流对象解析字符串参数异常 = "+e.getMessage());
			//e.printStackTrace();
			return str;
		}

		return str;
	}