golang读取toml配置文件

第三方开源库

github.com/BurntSushi/toml

第三方开源库的使用

主要使用该库的这个函数：

// DecodeFile is just like Decode, except it will automatically read the
// contents of the file at `fpath` and decode it for you.
func DecodeFile(fpath string, v interface{}) (MetaData, error) {
	bs, err := ioutil.ReadFile(fpath)
	if err != nil {
		return MetaData{}, err
	}
	return Decode(string(bs), v)
}

该函数功能是从toml文件中读取数据到定义好的结构体中。

官方例子：

package main

import (
	"fmt"
	"time"

	"github.com/BurntSushi/toml"
)

type tomlConfig struct {
	Title   string
	Owner   ownerInfo
	DB      database `toml:"database"`
	Servers map[string]server
	Clients clients
}

type ownerInfo struct {
	Name string
	Org  string `toml:"organization"`
	Bio  string
	DOB  time.Time
}

type database struct {
	Server  string
	Ports   []int
	ConnMax int `toml:"connection_max"`
	Enabled bool
}

type server struct {
	IP string
	DC string
}

type clients struct {
	Data  [][]interface{}
	Hosts []string
}

func main() {
	var config tomlConfig
	if _, err := toml.DecodeFile("example.toml", &config); err != nil {
		fmt.Println(err)
		return
	}

	fmt.Printf("Title: %s\n", config.Title)
	fmt.Printf("Owner: %s (%s, %s), Born: %s\n",
		config.Owner.Name, config.Owner.Org, config.Owner.Bio,
		config.Owner.DOB)
	fmt.Printf("Database: %s %v (Max conn. %d), Enabled? %v\n",
		config.DB.Server, config.DB.Ports, config.DB.ConnMax,
		config.DB.Enabled)
	for serverName, server := range config.Servers {
		fmt.Printf("Server: %s (%s, %s)\n", serverName, server.IP, server.DC)
	}
	fmt.Printf("Client data: %v\n", config.Clients.Data)
	fmt.Printf("Client hosts: %v\n", config.Clients.Hosts)
}

其中读取的toml文件如下：

# This is a TOML document. Boom.

title = "TOML Example"

[owner]
name = "Tom Preston-Werner"
organization = "GitHub"
bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
dob = 1979-05-27T07:32:00Z # First class dates? Why not?

[database]
server = "192.168.1.1"
ports = [ 8001, 8001, 8002 ]
connection_max = 5000
enabled = true

[servers]

  # You can indent as you please. Tabs or spaces. TOML don't care.
  [servers.alpha]
  ip = "10.0.0.1"
  dc = "eqdc10"

  [servers.beta]
  ip = "10.0.0.2"
  dc = "eqdc10"

[clients]
data = [ ["gamma", "delta"], [1, 2] ] # just an update to make sure parsers support it

# Line breaks are OK when inside arrays
hosts = [
  "alpha",
  "omega"
]