How to generate random string in Golang?

In Golang, random strings can be generated by using the RandStringBytes function in the crypto/rand package. This function accepts two parameters, the first parameter specifies the length of the random string to be generated, and the second parameter is a byte array specifying the range of characters to use.

How to generate random strings in Golang?

Generating random strings in Golang is very simple, just use the RandStringBytes function in the crypto/rand package.

Syntax

func RandStringBytes(n int, alphabet []byte) ([]byte, error)

Where:

• n Specifies the length of the random string to be generated.
• alphabet is a byte array specifying the range of characters to use.

Usage

The following is an example of using the RandStringBytes function to generate a random string:

package main

import (
    "crypto/rand"
    "fmt"
)

func main() {
    n := 10
    charset := []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
    b, err := rand.RandStringBytes(n, charset)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Printf("随机字符串：%s\n", b)
}

Practical case

Generate a random alphanumeric string of the specified length:

package main

import (
    "crypto/rand"
    "fmt"
)

func main() {
    n := 10
    charset := []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
    b, err := rand.RandStringBytes(n, charset)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Printf("随机字符串：%s\n", b)
}

Generate a random lowercase alphanumeric string of the specified length:

package main

import (
    "crypto/rand"
    "fmt"
)

func main() {
    n := 10
    charset := []byte("abcdefghijklmnopqrstuvwxyz")
    b, err := rand.RandStringBytes(n, charset)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Printf("随机字符串：%s\n", b)
}

Generate the specified Random hexadecimal string of length:

package main

import (
    "crypto/rand"
    "fmt"
)

func main() {
    n := 10
    charset := []byte("0123456789abcdef")
    b, err := rand.RandStringBytes(n, charset)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Printf("随机字符串：%s\n", b)
}

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