golang:第三方库：用vipper解析yaml配置文件

一，安装第三方库

$ go get github.com/spf13/viper

二，代码

1，配置文件

Database:
  DBType: mysql
  UserName: dbusername
  Password: dbpassword
  Host: 127.0.0.1:3306
  DBName: dbname
  Charset: utf8
  ParseTime: True
  MaxIdleConns: 10
  MaxOpenConns: 30

2, 代码:封装:

package setting

import (
	"github.com/spf13/viper"
)

type Setting struct {
	vp *viper.Viper
}

var sections = make(map[string]interface{})

//读取配置
func NewSetting() (*Setting, error) {
	vp := viper.New()
	vp.SetConfigName("config")
	//vp.AddConfigPath("config")
	vp.AddConfigPath(".")
	vp.SetConfigType("yaml")
	err := vp.ReadInConfig()
	if err != nil {
		return nil, err
	}

	s := &Setting{vp}
	return s, nil
}

//读取指定的一段
func (s *Setting) ReadSection(k string, v interface{}) error {
	err := s.vp.UnmarshalKey(k, v)
	if err != nil {
		return err
	}

	if _, ok := sections[k]; !ok {
		sections[k] = v
	}
	return nil
}

//重新加载
func (s *Setting) ReloadAllSection() error {
	for k, v := range sections {
		err := s.ReadSection(k, v)
		if err != nil {
			return err
		}
	}

	return nil
}

3,代码：读取到struct中

package config

import (
	"fmt"
	"industry/pkg/setting"
)

//数据库配置的struct类型
type DatabaseSettingS struct {
	DBType       string
	UserName     string
	Password     string
	Host         string
	DBName       string
	Charset      string
	ParseTime    bool
	MaxIdleConns int
	MaxOpenConns int
}

//定义全局变量
var (
	DatabaseSetting *DatabaseSettingS
)

//读取配置到全局变量
func SetupSetting() error {
	s, err := setting.NewSetting()
	if err != nil {
		return err
	}
	err = s.ReadSection("Database", &DatabaseSetting)
	if err != nil {
		return err
	}


	fmt.Println("setting:")
	//fmt.Println(ServerSetting)
	fmt.Println(DatabaseSetting)
	return nil
}

 4,main.go中做初始化:

func init() {

	err := config.SetupSetting()
	if err != nil {
		log.Fatalf("init.setupSetting err: %v", err)
	}


    //其他逻辑
}

三，测试效果:

$ go run main.go
setting:
&{mysql dbusername dbpassword 127.0.0.1:3306 dbname utf8 true 10 30}