解析yaml文件

介绍

YAML Ain’t Markup Language，一种非常简介的非标记语言，可以快速的对Yaml进行编码和解码。

官网地址：https://gopkg.in/yaml.v2

GoDoc：https://godoc.org/gopkg.in/yaml.v2

json和yaml文件都可解析

yaml文件

mysql:
  user: root
  password: 123456
  host: 192.198.1.1
  port: 3306
  dbname: mdb
redis:
  host: 192.168.1.1
  port: 1234
  auth: 123456
nginx_proxy:
  counter: 3
  nginx_list: [
    192.168.1.1,
    192.168.1.2,
    192.168.1.3
  ]

代码实现

package main
 
import (
	"fmt"
	"gopkg.in/yaml.v2"
	"io/ioutil"
	"log"
)
 
type MySQLConfig struct {
	User     string `yaml:"user"`
	Password string `yaml:"password"`
	Host     string `yaml:"host"`
	Port     int    `yaml:"port"`
	DbName   string `yaml:"dbname"`
}
type RedisConfig struct {
	Host string `yaml:"host"`
	Port int    `yaml:"port"`
	Auth string `yaml:"auth"`
}
type NginxProxyConfig struct {
	Counter   int      `yaml:"counter"`
	NginxList []string `yaml:"nginx_list"`
}
 
type ServiceYaml struct {
	MySQL      MySQLConfig      `json:"mysql"`
	Redis      RedisConfig      `json:"redis"`
	NginxProxy NginxProxyConfig `json:"nginx_proxy"`
}
 
func main() {
	filename := "/web/config.yaml"
	y := new(ServiceYaml)
	yamlFile, err := ioutil.ReadFile(filename)
	if err != nil {
		fmt.Printf("read file err %v\n", err)
		return
	}
 	
    # 也可以用这个来检测yaml文件是否有语法错误 
   
	err = yaml.Unmarshal(yamlFile, y) # 
	if err != nil {
		log.Fatalf("yaml unmarshal: %v\n", err)
		return
	}
 
	fmt.Printf("MySQL host : %s, port : %d, user : %s, password : %s, db_name : %s \n",
		y.MySQL.Host, y.MySQL.Port, y.MySQL.User, y.MySQL.Password, y.MySQL.DbName)
 
	fmt.Printf("Redis host : %s, port %d, auth : %s\n",
		y.Redis.Host, y.Redis.Port, y.Redis.Auth)
 
	fmt.Printf("Vip Counter: %d, Vip List : %v\n", y.NginxProxy.Counter, y.NginxProxy.NginxList)
 
	n, err := yaml.Marshal(y)
	if err != nil {
		log.Fatalf("marshal err : %v\n", err)
		return
	}
	fmt.Printf("yaml marshal : %v\n", string(n))
}