How to Generate a UUID in Golang

1. Generate UUID Using google/uuid Package in Golang
2. Generate UUID Using pborman/uuid Package in Golang

The universal unique identifier (UUID) is a software construction standard usually used to detect information since a duplicate value is near zero. It comprises 32 hexadecimal values that are divided into five blocks.

In this article, you’ll learn how to construct a UUID in Golang.

Generate UUID Using google/uuid Package in Golang

We will be using the google/uuid package to generate UUID. Let’s look at the code snippet below.

Example 1:

package main

import (
	"fmt"
	"github.com/google/uuid"
	"strings"
)

func main() {
	uuidWithHyphen := uuid.New()
	fmt.Println(uuidWithHyphen)
	uuid := strings.Replace(uuidWithHyphen.String(), "-", "", -1)
	fmt.Println(uuid)
}

Output:

0df82b55-f543-488a-97d2-20f09fd260ff
0df82b55f543488a97d220f09fd260ff

Here is another example of generating a UUID using the google/uuid package. To begin, you must first install the package.

go get github.com/google/uuid

Then, run the code below.

Example 2:

package main

import (
	"fmt"
	"github.com/google/uuid"
)

func main() {
	uuidValue := uuid.New()
	fmt.Printf("%s", uuidValue)
}

Output:

ce547c40-acf9-11e6-80f5-76304dec7eb7

Generate UUID Using pborman/uuid Package in Golang

Using the pborman/uuid package, we will generate a UUID.

Example:

package main

import (
	"fmt"
	"github.com/pborman/uuid"
	"strings"
)

func main() {
	uuidWithHyphen := uuid.NewRandom()
	fmt.Println(uuidWithHyphen)
	uuid := strings.Replace(uuidWithHyphen.String(), "-", "", -1)
	fmt.Println(uuid)
}

Output:

e995011c-987f-40d2-8f4c-03473b4cdbe0
e995011c987f40d28f4c03473b4cdbe0