Go 数据库连接方法，配置独立

根据需要进行调整，配置单独保存在配置文件中，需要的包 在import中下载即可

package utilimport ("database/sql""fmt"_ "github.com/go-sql-driver/mysql""github.com/robfig/config")var (DB_NAME,DB_USER,DB_PASS,DB_HOST,DB_PORT string)func init() {c, _ := config.ReadDefault("config/config.ini")DB_USER, _ = c.String("DB", "DB_USER")DB_PASS, _ = c.String("DB", "DB_PASS")DB_HOST, _ = c.String("DB", "DB_HOST")DB_NAME, _ = c.String("DB", "DB_NAME")DB_PORT, _ = c.String("DB", "DB_PORT")fmt.Println("\n当前服务器IP及端口为：", DB_HOST, DB_PORT, DB_USER, DB_PASS, DB_NAME)}func GetDbConnetion() (db *sql.DB, errstr error) {db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8", DB_USER, DB_PASS, DB_HOST, DB_PORT, DB_NAME))if err != nil {fmt.Println("\nconnection mysql error")return db, err}//defer db.Close()db.SetMaxOpenConns(2000)db.SetMaxIdleConns(1000)err = db.Ping()if err != nil {fmt.Println("\nopen mysql error ", err)return db, err}return db, nil}