日志、字符串拼接

/*
 * @,@Author: ,: lxcos
 * @,@Date: ,: 2020-10-31 17:36:39
 */
package main

import (
    "github.com/sirupsen/logrus"
)

func main() {
    customFormatter := new(logrus.TextFormatter)
    customFormatter.TimestampFormat = "2006-01-02 15:04:05"
    customFormatter.FullTimestamp = true
    logrus.SetFormatter(customFormatter)
    logrus.Info("Hello Walrus after FullTimestamp=true")
}

关于字符串拼接效率：

单词调用字符串拼接性能 + > strings.Join > bytes.Buffer > fmt.Sprintf
大量数据拼接推荐bytes.buffer{}，bytes.buffer的性能是非常高的。

随机字符串生成器：

func RandomString(n int, allowedChars ...[]rune) string {
    var letters []rune

    if len(allowedChars) == 0 {
        letters = defaultLetters
    } else {
        letters = allowedChars[0]
    }

    b := make([]rune, n)
    for i := range b {
        b[i] = letters[rand.Intn(len(letters))]
    }

    return string(b)
}

-------------------------------------------------------------------------------------

func GetNoceStr() string {
    char := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789=_"
    rand.NewSource(time.Now().UnixNano()) // 产生随机种子
    var s bytes.Buffer
    for i := 0; i < 32; i ++ {
        s.WriteByte(char[rand.Int63() % int64(len(char))])
    }
    return s.String()
}