7-4 panic和recover

最新推荐文章于 2025-05-21 00:24:27 发布

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本文探讨了Go语言中错误处理的重要性，通过示例代码详细解释了如何使用defer和recover来捕获并处理运行时错误，避免程序崩溃，提供了一种优雅地处理异常情况的方法。

代码：https://github.com/NIGHTFIGHTING/go_learning/blob/master/src/errhandling/recover/recover.go

package main

import (
    //"errors"
    "fmt"
)

func tryRecover() {
    defer func() {
        r := recover()
        if err, ok := r.(error); ok {
            fmt.Println("Error occurred:", err)
        } else {
            //panic(r)
            panic(fmt.Sprintf(
                "I don't know what to do: %v", r))
            //panic: 123 [recovered]
                //panic: I don't know what to do: 123
        }
    }()
    //panic(errors.New("this is an error"))
    //b := 0
    //a := 5/b
    //fmt.Println(a)
    //Error occurred: runtime error: integer divide by zero

    panic(123)
}

func main() {
    tryRecover()
}