Exception异常规范

把异常的栈轨迹以String形式返回

    /**
     * 把异常的栈轨迹以String形式返回,而不是直接打印到console
     * @author King
     * @time 2015-04-29
     * @return
     */
    public static String getLongInfo(Throwable e){
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw, true);
        e.printStackTrace(pw);
        pw.flush();
        sw.flush();
        return sw.toString();
    }