go get github.com/go-ini/ini

[database]
host = localhost
port = 3306
user = root
password = 123456
dbname = myapp

[server]
addr = :8080
timeout = 30
enable_gzip = true

package main

import (
    "fmt"
    "log"

    "github.com/go-ini/ini"
)

func main() {
    cfg, err := ini.Load("config.ini")
    if err != nil {
        log.Fatal("无法加载配置文件:", err)
    }

    // 获取 database 段
    dbHost := cfg.Section("database").Key("host").String()
    dbPort, _ := cfg.Section("database").Key("port").Int()
    dbUser := cfg.Section("database").Key("user").String()
    dbPass := cfg.Section("database").Key("password").String()
    dbName := cfg.Section("database").Key("dbname").String()

    // 获取 server 段
    srvAddr := cfg.Section("server").Key("addr").String()
    timeout, _ := cfg.Section("server").Key("timeout").Int64()
    enableGzip, _ := cfg.Section("server").Key("enable_gzip").Bool()

    fmt.Printf("数据库: %s@%s:%d/%s\n", dbUser, dbHost, dbPort, dbName)
    fmt.Printf("服务地址: %s, 超时: %ds, Gzip: %v\n", srvAddr, timeout, enableGzip)
}

type DatabaseConfig struct {
    Host     string `ini:"host"`
    Port     int    `ini:"port"`
    User     string `ini:"user"`
    Password string `ini:"password"`
    DBName   string `ini:"dbname"`
}

type ServerConfig struct {
    Addr      string `ini:"addr"`
    Timeout   int64  `ini:"timeout"`
    EnableGzip bool  `ini:"enable_gzip"`
}

type AppConfig struct {
    Database DatabaseConfig `ini:"database"`
    Server   ServerConfig   `ini:"server"`
}

func main() {
    var appConfig AppConfig

    err := ini.MapTo(&appConfig, "config.ini")
    if err != nil {
        log.Fatal("映射配置失败:", err)
    }

    fmt.Printf("数据库主机: %s\n", appConfig.Database.Host)
    fmt.Printf("服务端口: %s\n", appConfig.Server.Addr)
}

// 读取带默认值的字段
timeout := cfg.Section("server").Key("timeout").MustInt(60)
logLevel := cfg.Section("server").Key("log_level").MustString("info")