Java Exception异常信息怎么打印、记录，几种方式自己选

客官°小女子只卖身不卖艺 2023-09-24 12:44 45阅读 0赞

1. 啥都不做，直接就被抛出来

![7521a6b06afe4e64aa373f3bc5eb9afd.png][]

效果：

![7aa3c2ca6e0f4611b3d2e381752e943d.png][]

2.打印栈信息

![537ebf2a480d4fd8b8304f86ffe42a60.png][]

3.通过 printStackTrace 的构造方法 直接 转换成字符串

public static void main(String[] args) throws IOException {
            try {
                int a=10;
                int b=0;
                System.out.println(a/b);
            } catch (Exception e) {
                String exceptionStr = getExceptionStr(e);
                System.out.println(exceptionStr);
            }
        }

核心方法：

public static String getExceptionStr(Exception e) throws IOException {
            //读取异常栈信息
            ByteArrayOutputStream arrayOutputStream=new ByteArrayOutputStream();
            e.printStackTrace(new PrintStream(arrayOutputStream));
            //通过ByteArray转换输入输出流
            BufferedReader fr=new BufferedReader(new InputStreamReader(new ByteArrayInputStream(arrayOutputStream.toByteArray())));
            String str;
            StringBuilder exceptionStr=new StringBuilder();
            while ((str=fr.readLine())!=null){
                exceptionStr.append(str);
            }
            //关闭流
            fr.close();
            return exceptionStr.toString();
        }

效果:

![72a7b3c6feeb4cd4bf7103c333ab7307.png][]

![09b1a615b31c43fc89c594dd3e9f09d2.png][]

[7521a6b06afe4e64aa373f3bc5eb9afd.png]: https://img-blog.csdnimg.cn/7521a6b06afe4e64aa373f3bc5eb9afd.png
[7aa3c2ca6e0f4611b3d2e381752e943d.png]: https://img-blog.csdnimg.cn/7aa3c2ca6e0f4611b3d2e381752e943d.png
[537ebf2a480d4fd8b8304f86ffe42a60.png]: https://img-blog.csdnimg.cn/537ebf2a480d4fd8b8304f86ffe42a60.png
[72a7b3c6feeb4cd4bf7103c333ab7307.png]: https://img-blog.csdnimg.cn/72a7b3c6feeb4cd4bf7103c333ab7307.png
[09b1a615b31c43fc89c594dd3e9f09d2.png]: https://img-blog.csdnimg.cn/09b1a615b31c43fc89c594dd3e9f09d2.png