go默认的 log 输出的日志样式比较难看，所以通过以下方式进行了美化和格式化，而且加入了 unicode 的ascii码，进行色彩渲染。

package mainimport ("fmt""log""os""runtime""strings""time"
)// 自定义日志格式
type CustomLogger struct {logger *log.Logger
}var levelColors map[string]string = map[string]string{"DEBUG":    "[97;46m", // 蓝色"INFO":     "[97;42m", // 绿色"WARNING":  "[97;43m", // 黄色"ERROR":    "[97;41m", // 红色"CRITICAL": "[97;45m", // 红色加粗"SUCCESS":  "[97;42m", // 绿色加粗
}// 初始化自定义日志
func NewCustomLogger() *CustomLogger {return &CustomLogger{logger: log.New(os.Stdout, "", 0), // 输出到标准输出，不带前缀}
}// 自定义日志格式
func (l *CustomLogger) formatLog(level string, message string) string {// 获取当前时间now := time.Now().Format("2006-01-02 15:04:05.000")// 获取调用栈信息pc, file, line, ok := runtime.Caller(3) // 跳过三层调用栈caller := "unknown"if ok {funcName := runtime.FuncForPC(pc).Name()caller = fmt.Sprintf("%s:%d", file, line)if index := strings.LastIndex(funcName, "."); index != -1 {caller = fmt.Sprintf("%s.%s:%d", funcName[:index], funcName[index+1:], line)}}// 构建日志格式return fmt.Sprintf("[32m%s[0m |%s%s[0m| [35m%s[0m - [33m%s[0m",now, levelColors[level], level, caller, message)
}// 日志输出函数
func (l *CustomLogger) Log(level string, message string) {logLine := l.formatLog(level, message)l.logger.Println(logLine)
}// 不同级别的日志函数
func (l *CustomLogger) Info(message string) {l.Log("INFO", message)
}func (l *CustomLogger) Infof(format string, v ...any) {message := fmt.Sprintf(format, v...)l.Log("INFO", message)
}func (l *CustomLogger) Error(message string) {l.Log("ERROR", message)
}func (l *CustomLogger) Errorf(format string, v ...any) {message := fmt.Sprintf(format, v...)l.Log("ERROR", message)
}func (l *CustomLogger) Debug(message string) {l.Log("DEBUG", message)
}func (l *CustomLogger) Debugf(format string, v ...any) {message := fmt.Sprintf(format, v...)l.Log("DEBUG", message)
}

下面是实际展示效果: