go语言中的配置管理神器 --viper 二 实战

Server:
  RunMode: debug
  HttpPort: :8080
  ReadTimeout: 60
  WriteTimeout: 60
App:
  DefaultPageSize: 10
  MaxPageSize: 100
  LogSavePath: storage/logs
  LogFileName: tools
  LogFileExt: .log
Database:
  DBType: mysql
  Username: root  # 填写你的数据库账号
  Password: root  # 填写你的数据库密码
  Host: 127.0.0.1:3306
  DBName: douyin
  TablePrefix: blog_
  Charset: utf8
  ParseTime: True
  MaxIdleConns: 10
  MaxOpenConns: 30 在global文件夹下添加setting.go文件，并添加以下内容package global

import "studyviper/setting"

var (
	ServerSetting   *setting.ServerSettingS
	AppSetting      *setting.AppSettingS
	DatabaseSetting *setting.DatabaseSettingS
) 添加global文件时把几个类实例化为全局变量，方便将来其他需要的方法调用。创建配置类 创建配置类的目的是把配置文件中的属性加载如实体类里面，方便其他程序进行读取配置信息的操作。
在setting文件夹下的section.go文件夹下添加下面的内容:package setting

import "time"

type ServerSettingS struct {
	RunMode      string
	HttpPort     string
	ReadTimeout  time.Duration
	WriteTimeout time.Duration
}

type AppSettingS struct {
	DefaultPageSize int
	MaxPageSize     int
	LogSavePath     string
	LogFileName     string
	LogFileExt      string
}

type DatabaseSettingS struct {
	DBType       string
	UserName     string
	Password     string
	Host         string
	DBName       string
	TablePrefix  string
	Charset      string
	ParseTime    bool
	MaxIdleConns int
	MaxOpenConns int
}

package setting

import "github.com/spf13/viper"

type Setting struct {
	vp *viper.Viper
}

// 实例化setting对象
func NewSetting() (*Setting, error) {
	vp := viper.New()          //创建viper对象
	vp.SetConfigName("config") //配置文件的名称
	vp.AddConfigPath("./config/")
	vp.SetConfigType("yaml") //配置文件的拓展名
	err := vp.ReadInConfig() //读取配置文件的内容
	if err != nil {
		return nil, err
	}

	return &Setting{vp}, nil
}
//可以选择 Unmarshaling 所有的值或特定得值到 struct，map 
func (s *Setting) ReadSection(k string, v interface{}) error {

	err := s.vp.UnmarshalKey(k, v)
	if err != nil {
		return err
	}

	return nil
}

package main

import (
	"fmt"
	"studyviper/global"
	"studyviper/setting"
)

func main() {
	setting, err := setting.NewSetting()
	if err != nil {
		fmt.Println("初始化viper出错")
	}
	err = setting.ReadSection("Server", &global.ServerSetting)
	if err != nil {
		fmt.Println("读取Server配置出错")
	}
	fmt.Println(global.ServerSetting)
	err = setting.ReadSection("App", &global.AppSetting)
	if err != nil {
		fmt.Println("读取APP配置出错")
	}
	fmt.Println(global.AppSetting)
	err = setting.ReadSection("Database", &global.DatabaseSetting)
	if err != nil {
		fmt.Println("读取Database配置出错")
	}
	fmt.Println(global.DatabaseSetting)

}