https://www.nowcoder.com/feed/main/detail/db5a5628fdbc4e3ab40b70107765c0d1?sourceSSR=search

https://segmentfault.com/a/1190000020379007

https://blog.csdn.net/cuidiwhere/article/details/8138700

异常机制可以帮助我们定位错误，给出错误出现的原因，帮助我们解决问题。