Java读取HttpServletRequest的post数据流

public String readPostData(HttpServletRequest request) {
        StringBuilder result = new StringBuilder();
        try {
            String line;
            BufferedReader reader = request.getReader();
            while (null != (line = reader.readLine())) {
                result.append(line);
            }
        } catch (Exception e) {
            Log.info(e.getMessage());
        }
        return result.toString();
    }