Go--解析yaml文件

yaml 文件是目前最常用的配置文件，使用go语言编写代码和工具时，也会用到yaml文件，将服务配置及中间件等信息定义到yaml文件中，后续可根据实际场景来选用。

//先下载外部包
go get -u gopkg.in/yaml.v2

1、定义yaml配置文件

conf/test.yaml

ck:
  host: 11.11.11.11
  port: 9001
  database: db2
  username: test2
  password: 123ck456
user: test
password: 123yy456
host: 10.10.10.10
port: 3306
dbname: db1

2、主程序

package main

import (
    "fmt"
    "gopkg.in/yaml.v3"
    "io/ioutil"
)

type Conn struct {
    Ck struct {
        Host     string `yaml:"host"`
        Port     string `yaml:"port"`
        Database string `yaml:"database"`
        Username string `yaml:"username"`
        Password string `yaml:"password"`
    }
}
type Mysql struct {
    User     string `yaml:"user"`
    Password string `yaml:"password"`
    Host     string `yaml:"host"`
    Port     string `yaml:"port"`
    DBname   string `yaml:"dbname"`
}

const cfgFile = "conf/test.yaml"

func main() {
    data, err := ioutil.ReadFile(cfgFile)　　//读取配置文件的路径
    if err != nil {
        fmt.Printf("err: %v\n", err)
        return
    }

    var conf Conn
    if err := yaml.Unmarshal(data, &conf); err != nil {　　//将yaml文件中的信息反序列化给conf结构体
        fmt.Printf("err: %v\n", err)
        return
    }
    yml, _ := yaml.Marshal(conf)　　//序列化为yaml文件
    fmt.Printf("conf: %#v\n", conf)
    fmt.Printf("%s\n", yml)

    var confs Mysql
    if err := yaml.Unmarshal(data, &confs); err != nil {
        fmt.Printf("err: %v\n", err)
        return
    }
    yaml, _ := yaml.Marshal(confs)
    fmt.Printf("conf: %#v\n", confs)
    fmt.Printf("%s\n", yaml)
}

3、输出结果

conf: main.Conn{Ck:struct { Host string "yaml:\"host\""; Port string "yaml:\"por
t\""; Database string "yaml:\"database\""; Username string "yaml:\"username\"";
Password string "yaml:\"password\"" }{Host:"11.11.11.11", Port:"9001", Database:
"db2", Username:"test2", Password:"123ck456"}}
ck:
    host: 11.11.11.11
    port: "9001"
    database: db2
    username: test2
    password: 123ck456

conf: main.Mysql{User:"test", Password:"123yy456", Host:"10.10.10.10", Port:"330
6", DBname:"db1"}
user: test
password: 123yy456
host: 10.10.10.10
port: "3306"
dbname: db1

将yaml文件中的信息反序列化给Config结构体