java 获取 reuqest payload 里的数据

	public static String getBody(HttpServletRequest request) throws IOException {
	    String body = null;
	    StringBuilder stringBuilder = new StringBuilder();
	    BufferedReader bufferedReader = null;
	    try {
	        InputStream inputStream = request.getInputStream();
	        if (inputStream != null) {
	            bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
	            char[] charBuffer = new char[128];
	            int bytesRead = -1;
	            while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
	                stringBuilder.append(charBuffer, 0, bytesRead);
	            }
	        } else {
	            stringBuilder.append("");
	        }
	    } catch (IOException ex) {
	        throw ex;
	    } finally {
	        if (bufferedReader != null) {
	            try {
	                bufferedReader.close();
	            } catch (IOException ex) {
	                throw ex;
	            }
	        }
	    }

	    body = stringBuilder.toString();
	    return body;
	}