GoLang中panic和recover作用详解

func processFile(filename string) {
    if filename == "" {
        panic("Filename cannot be empty!")
    }
    // ... other code
}

func handlePanic() {
    if r := recover(); r != nil {
        fmt.Println("Recovered from panic:", r)
        // You can perform additional recovery actions here
    }
}
func processFile(filename string) {
    defer handlePanic() // defer a function to recover from panic
    if filename == "" {
        panic("Filename cannot be empty!")
    }
    // ... other code
}

package main
import (
    "fmt"
    "encoding/json"
    "os"
)
type Config struct {
    Port    int
    Timeout int
    // 其他配置项...
}
func readConfig(filename string) (*Config, error) {
    file, err := os.Open(filename)
    if err != nil {
        return nil, err
    }
    defer file.Close()
    decoder := json.NewDecoder(file)
    var config Config
    if err := decoder.Decode(&config); err != nil {
        panic(fmt.Sprintf("Failed to decode config file: %v", err))
    }
    return &config, nil
}
func main() {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered from panic:", r)
        }
    }()
    config, err := readConfig("config.json")
    if err != nil {
        fmt.Printf("Error reading config file: %v\n", err)
        return
    }
    fmt.Println("Config:", config)
}