Golang Practice Records Reading Yaml Configuration Files

# yaml test sample# null or NULL is a keyword and cannot be written
# Several values ​​indicating that bool is true or falseresult_true: 
  - y
  - Y
  - yes
  - Yes
  - YES
  - true
  - True
  - TRUE
  - on
  - On
  - ON

# Another form of arrayresult_false: [n, N, no, No, NO , false, False, FALSE , off, Off, OFF]

# Name# stringname: conf file

# Version# If pressing floating point, 2.0 will be converted to 2# If pressing a string, leave it as it isversion: 2.0

# Boolean class, convert to 1 or 0need: true

# timetime: 2020-10-03T09:21:13

empty: nul

#Object# Adding double quotes will escape \n, which means a line breakmy:
  name: late \n lee
  name1: "late \n lee"
  age: 99
  
# piecetext: |
  hello
  world!

# arrayfruit:
  - apple
  - apple1
  - apple2
  - apple3
  - apple4
  - apple5

# Multi-level arraymulti:
  sta:
    - 110 210 ddd 99
    - 133 135 1 2 1588 1509
    - 310-410
    - 333-444

# Multi-levelloginfo:
  log:
    dir: log

# Multi-level objectmymap:
  dir: "mymap"
  map_data:
    - name: "Online"
      attri: "Online Electronics"
      url: ""
    - name: "Offline"
      attri: "Offline电子"
      url: ""
    # more

package test

import (
	"fmt"
	"os"
	"testing"

	"/spf13/viper"
)

var (
	cfgFile string
)

type mapUrl_t struct {
	Name  string `json:"name"`
	Attri string `json:"attri"`
	Url   string `json:"url"`
}

func TestYaml(t *) {
	("test of yaml...")

	// 2 ways to set configuration files	if cfgFile != "" {
		// Use config file from the flag.
		(cfgFile)
	} else {
		("./")
		("config")
		("yaml")
	}

	() // read in environment variables that match

	// Read	err := ()
	if err != nil {
		("'' file read error:", err)
		(0)
	}

	name := ("name") // Read string	version := ("version")

	need := ("need") // Read Boolean	theTime := ("time")
	empty := ("empty")
	text := ("text")

	("need: %v name: %v\nversion: %v \ntime: %v \nempty: %s \ntext: %v\n", need, name, version, theTime, empty, text)

	// Multi-level reading	name = ("")
	name1 := ("my.name1")
	age := ("")
	("name: %v, name1: %v age: %v \n", name, name1, age)

	// String array	newSta := ("")
	for idx, value := range newSta {
		("sta[%d]: %v\n", idx, value)
	}

	fruit := ("fruit")
	("fruit: %v\n", fruit)

	// Read non-existent fields, the string is empty, and the value is 0	bad := ("bad")
	bad1 := ("")
	("bad: [%v] bad1: [%v]\n", bad, bad1)

	// Read on, off and other values ​​according to values ​​and strings	result := ("result_true")
	("result true: [%v]\n", result)
	result1 := ("result_true")
	("result1 true: [%v]\n", result1)

	result = ("result_false")
	("result false: [%v]\n", result)
	result1 = ("result_false")
	("result1 false: [%v]\n", result1)

	logdir := ("")
	("logdir: %v\n", logdir)

	// Multi-level object	// tmpMap := make([]mapUrl_t, 0, 20)
	var tmpMap []mapUrl_t

	("mymap.map_data", &tmpMap)

	for _, item := range tmpMap {
		("name: %v url: %v\n", , )
	}
}

go test -v -run TestYaml

test of yaml...
need: true name: conf file
version: 2
time: 2020-10-03T09:21:13
empty: nul
text: hello
world!

name: late \n lee, name1: late
 lee age: 99
sta[0]: 110 210 ddd 99
sta[1]: 133 135 1 2 1588 1509
sta[2]: 310-410
sta[3]: 333-444
fruit: [apple apple1 apple2 apple3 apple4 apple5]
bad: [] bad1: [0]
result true: [[1 1 1 1 1 1 1 1 1 1 1]]
result1 true: [[true true true true true true true true true true true]]
result false: [[0 0 0 0 0 0 0 0 0 0 0]]
result1 false: [[false false false false false false false false false false false]]
logdir: log
name: Online url: 
name: Offline url: