45 lines
973 B
Go
45 lines
973 B
Go
package util
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import (
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"encoding/base64"
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"fmt"
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qrcode "github.com/skip2/go-qrcode"
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"github.com/spf13/cast"
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"math/rand"
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"time"
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)
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func RandomStr(length int) string {
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str := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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bytes := []byte(str)
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result := []byte{}
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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for i := 0; i < length; i++ {
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result = append(result, bytes[r.Intn(len(bytes))])
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}
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return string(result)
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}
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func CutTail(str string, length int) string {
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if len(str) <= length {
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return str
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}
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return str[0:length]
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}
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func FloatCut(f float64) float64 {
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return cast.ToFloat64(fmt.Sprintf("%.2f", f))
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}
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func CreateQrcodeBase64V2(content string, level qrcode.RecoveryLevel, size int) (string, error) {
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var png []byte
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//固定方法
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png, err := qrcode.Encode(content, level, size)
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if err != nil {
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return "", err
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}
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//文件流需要使用base64编码后才可使用
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return base64.StdEncoding.EncodeToString(png), nil
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}
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