java异常信息打印

如果你不仅想在日志中查看异常信息，也想把异常信息保存起来作为数据查看，那么你可以这样做

    public void printException(Exception e) {
        ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
        e.printStackTrace(new PrintStream(arrayOutputStream));

        BufferedReader fr = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(arrayOutputStream.toByteArray())));
        String str;
        StringBuilder eStr = new StringBuilder();

        try {
            while((str = fr.readLine()) != null){
                eStr.append("\n"+str);
            }

        } catch (Exception e1) {
            e1.printStackTrace();
        }finally {
            try {
                fr.close();
            } catch (IOException e2) {
                e2.printStackTrace();
            }
        }
        System.out.println(eStr.toString());
    }

异常信息打印的出效果跟控制台看到的一致