Go YAML解析:必填字段

package main

import (
    "fmt"
    "io/ioutil"
    "log"

    "gopkg.in/yaml.v2"
)

type Config struct {
    RequiredField string `yaml:"required_field,omitempty,required"`
    OptionalField string `yaml:"optional_field,omitempty"`
}

func main() {
    // 读取YAML文件内容
    yamlFile, err := ioutil.ReadFile("config.yaml")
    if err != nil {
        log.Fatalf("Failed to read YAML file: %v", err)
    }

    // 解析YAML文件
    var config Config
    err = yaml.Unmarshal(yamlFile, &config)
    if err != nil {
        log.Fatalf("Failed to parse YAML: %v", err)
    }

    // 检查必填字段
    if config.RequiredField == "" {
        log.Fatal("Required field is missing")
    }

    // 打印解析结果
    fmt.Printf("Required Field: %s\n", config.RequiredField)
    fmt.Printf("Optional Field: %s\n", config.OptionalField)
}