package db import "fmt" type Config struct { Address string `json:"address"` Account string `json:"account"` Password string `json:"password"` DatabaseName string `json:"databaseName"` } func (cfg *Config) MakeSourceString() string { return fmt.Sprintf( "%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=true&loc=%s", cfg.Account, cfg.Password, cfg.Address, cfg.DatabaseName, "Asia%2FShanghai", ) }