package main

import (
	"fmt"
)

type TryTarget func()

type CatchTarget func()

func TryAndCatch(target TryTarget,catch CatchTarget) {
	defer func() {
		if err := recover(); err != nil {
			catch()
		}
	}()
	target()
}

func main() {
	TryAndCatch(func() {
		panic("抛出异常")
	},func() {
		fmt.Println("异常恢复")
	})
}

先别说话，亮出代码，关于golang程序的异常处理涉及到三个关键字:

1.panic 把异常抛出去，一旦抛出异常该函数将立刻终止运行，下一步自动跳转到defer语句中

2.defer 语句中执行recover捕获异常，获取异常的具体信息