Golang使用预定义的结构和动态值解析YAML

package main

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

    "gopkg.in/yaml.v2"
)

type Config struct {
    Server   ServerConfig   `yaml:"server"`
    Database DatabaseConfig `yaml:"database"`
}

type ServerConfig struct {
    Host string `yaml:"host"`
    Port int    `yaml:"port"`
}

type DatabaseConfig struct {
    Username string `yaml:"username"`
    Password string `yaml:"password"`
}

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

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

    // 打印解析后的数据
    fmt.Printf("服务器配置：Host=%s, Port=%d\n", config.Server.Host, config.Server.Port)
    fmt.Printf("数据库配置：Username=%s, Password=%s\n", config.Database.Username, config.Database.Password)
}