把异常转换为字符串

    public static String getStackMsg(Exception e){        StringBuffer sb=new StringBuffer();        StackTraceElement[] stackArray=e.getStackTrace();        for (int i = 0; i < stackArray.length; i++) {            StackTraceElement element=stackArray[i];            sb.append(element.toString()+"\r\n");        }        return sb.toString();    }