Java如何获取e.printStackTrace()打印的信息

某些情况下，我们需要获取应用打印的异常信息，这时就可以借助StringWriter和PrintWriter两个类来获取异常信息，具体用法如下：

try{
            throw new NullPointerException();
        }catch (Exception e){
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw,true));
            String infomsg = sw.toString();
            System.out.println(infomsg);
        }