因为在开发中使用toml进行配置，并使用了 viper 这多功能解析库来解析 toml配置文件。遇到 编组失败

如 配置文件：

[database]
[database.db1]
[database.db1.dev]
driver = "mysql"
dsn = "cusr:97tDudcd@tcp(192.168.6.182:3306)/hue?charset=utf8mb4&parseTime=true"
maxOpenConns = 1000
maxIdleConns = 200
connMaxLifeTime = 50

[database.db1.pro]
driver = "mysql"
dsn = "cusr:97tDudcd@tcp(192.168.6.182:3306)/hue?charset=utf8mb4&parseTime=true"
maxOpenConns = 1000
maxIdleConns = 200
connMaxLifeTime = 50

[database.db1.test]
driver = "mysql"
dsn = "cusr:97tDudcd@tcp(192.168.6.182:3306)/hue?charset=utf8mb4&parseTime=true"
maxOpenConns = 1000
maxIdleConns = 200
connMaxLifeTime = 50


[database.db2]
[database.db2.dev]
driver = "mysql"
dsn = "cusr:97tDudcd@tcp(192.168.6.182:3306)/hue?charset=utf8mb4&parseTime=true"
maxOpenConns = 1000
maxIdleConns = 200
connMaxLifeTime = 50

[database.db2.dev]
driver = "mysql"
dsn = "cusr:97tDudcd@tcp(192.168.6.182:3306)/hue?charset=utf8mb4&parseTime=true"
maxOpenConns = 1000
maxIdleConns = 200
connMaxLifeTime = 50

[database.db3]
[database.db3.dev]
driver = "mysql"
dsn = "cusr:97tDudcd@tcp(192.168.6.182:3306)/hue?charset=utf8mb4&parseTime=true"
maxOpenConns = 1000
maxIdleConns = 200
connMaxLifeTime = 50

# and more 后面还有 db4 db5 db6 。。。。

使用 golang进行 解析：

type singleConf struct {
    driver          string `toml:"driver"`
    dsn             string `toml:"dsn"`
    maxOpenConns    int    `toml:"maxOpenConns"`
    maxIdleConns    int    `toml:"maxIdleConns"`
    connMaxLifeTime int    `toml:"connMaxLifeTime"`
}

type envConf struct {
    dev singleConf
    pro singleConf
    test singleConf
}

type tomlConf struct {
    database map[string]envConf
}

var TomlConf tomlConf

func init() {
    confDir, _ := filepath.Abs(path.Dir("."))
    confDir = confDir + "/conf/"
    fmt.Println(confDir)
    viper.AddConfigPath(confDir)
    viper.SetConfigType("toml")
    viper.SetConfigName("db")
    if err := viper.ReadInConfig(); err != nil {
        panic(err)
    }
    if err := viper.Unmarshal(&TomlConf); err != nil {
        panic(err)
    }
    fmt.Println(TomlConf.database)
}

打印之后 是 一个空的 map