Summary of the method of Golang parsing yaml files

//Download the external package firstgo get -u /yaml.v2

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

package main

import (
    "database/sql"
    "fmt"
    "/yaml.v3"
    "io/ioutil"
    "time"
)

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/"

func main() {
    data, err := (cfgFile)//Read the path to the configuration file    if err != nil {
        ("err: %v\n", err)
        return
    }

    var conf Conn
    if err := (data, &conf); err != nil {//Deserialize the information in the yaml file to the conf structure        ("err: %v\n", err)
        return
    }
    yml, _ := (conf)//Serialize to yaml file    ("conf: %#v\n", conf)
    ("%s\n", yml)

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

    //Connect the database    user := 
    password := 
    host := 
    port := 
    database := 
    dataSourceName := user + ":" + password + "@tcp(" + host + ":" + port + ")/" + database + "?charset=utf8&parseTime=True"
    conn, err := ("mysql", dataSourceName)
    if err != nil {
        return
    }
    ( * 30)     //The maximum connection timeout time should be less than the link timeout time of the database itself    (10)                  //Maximum number of idle connections (the connection that can be obtained at the same time during concurrency is also the interoperable connection that is put back into the pool after use, thereby improving performance)    (100)                 //The maximum number of open connections, 0 is not limited
    //Remember to close the connection after ending    defer ()
}

conf: {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: {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

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