app.go

package main



type Bot struct {
	User     string   `json:"user"`
	Nick     string   `json:"nick"`
	Server   string   `json:"server"`
	Port     string   `json:"port"`
	Channels []string `json:"channels"`
	Symbol   string   `json:"symbol"`
}

config.json

{
  "user": "test",
  "nick": "test",
  "server": "test.net",
  "port": "6667",
  "channels": ["#foo"],
  "symbol": "$"
}

main.go

package main

import (
	"bufio"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net"
	"net/textproto"
	"strings"
)

func main() {
	file, err := ioutil.ReadFile("./config.json")
	if err != nil {
		panic(err)
	}
	bot := &Bot{}
	json.Unmarshal([]byte(file), &bot)

	fmt.Println(string(bot.user))
}