GO生成UUID
<h1 id="uuid简介">uuid简介</h1><p>通用唯一识别码（英语：universally unique identifier，简称uuid）是一种软件建构的标准，亦为自由软件基金会组织在分散式计算环境领域的一部份。<br>
uuid的目的，是让分散式系统中的所有元素，都能有唯一的辨识信息，而不需要通过中央控制端来做辨识信息的指定。<br>
如此一来，每个人都可以创建不与其它人冲突的uuid。<br>
在这样的情况下，就不需考虑数据库创建时的名称重复问题。目前最广泛应用的uuid，是微软公司的全局唯一标识符（guid），而其他重要的应用，则有linux ext2/ext3文件系统、luks加密分区、gnome、kde、mac os x等等。</p>
<hr>
<p>目前，golang中并没有uuid的标准库，所以需要借助第三方库。<br>
下面介绍几个用的比较多的uuid第三方库</p>
<h1 id="githubcomgoogleuuid">github.com/google/uuid</h1>
<p>谷歌出品的go语言uuid库<code>github.com/google/uuid</code></p>
<h2 id="生成纯数字类型uuid">生成纯数字类型uuid</h2>
<pre><code class="language-go">package main
import (
"fmt"
"github.com/google/uuid"
)
func main() {
u1 := uuid.New()
u2, _ := uuid.NewRandom()
fmt.Println(u1.ID())
fmt.Println(u2.ID())
}
/* -- 输出 --
3507369127
1284741309
*/
</code></pre>
<h2 id="生成字符串类型uuid">生成字符串类型uuid</h2>
<pre><code class="language-go">package main
import (
"fmt"
"github.com/google/uuid"
)
func main() {
u1 := uuid.New()
u2, _ := uuid.NewRandom()
fmt.Println(u1.String())
fmt.Println(u2.String())
}
/* -- 输出 --
494e09ff-29ec-426a-a3a1-362078085557
8451e91a-4251-4cb8-ac82-6bd1fb684a61
*/
</code></pre>
<h1 id="githubcomsatorigouuid">github.com/satori/go.uuid</h1>
<p>GitHub上还有一个uuid库<code>github.com/satori/go.uuid</code>，但是只能生成字符串类型的uuid。</p>
<pre><code class="language-go">package main
import (
"fmt"
"github.com/satori/go.uuid"
)
func main() {
u1 := uuid.NewV4()
fmt.Println(u1.String())
}
/* -- 输出 --
36a657b9-f529-4037-b6f7-9a1cb8060996
*/
</code></pre>
<h1 id="githubcomrsxid">github.com/rs/xid</h1>
<pre><code class="language-go">package main
import (
"fmt"
"github.com/rs/xid"
)
func main() {
id := xid.New()
fmt.Printf("github.com/rs/xid: %s\n", id.String())
}
//github.com/rs/xid: cdoup9qma9lh444rnjsg
</code></pre>
<h1 id="githubcomsegmentioksuid">github.com/segmentio/ksuid</h1>
<pre><code class="language-go">package main
import (
"fmt"
"github.com/segmentio/ksuid"
)
func main() {
id := ksuid.New()
fmt.Printf("github.com/segmentio/ksuid:%s\n", id.String())
}
//github.com/segmentio/ksuid:2HWp8gYl9YD2e1mWN4wt3M0xFW0
</code></pre>
<h1 id="githubcomkjkbetterguid">github.com/kjk/betterguid</h1>
<pre><code class="language-go">package main
import (
"fmt"
"github.com/kjk/betterguid"
)
func main() {
id := betterguid.New()
fmt.Printf("github.com/kjk/betterguid: %s\n", id)
}
//github.com/kjk/betterguid: -NGp05ol0KJTby4X5oda
</code></pre>
<h1 id="githubcomoklogulid">github.com/oklog/ulid</h1>
<pre><code class="language-go">package main
import (
"fmt"
"math/rand"
"time"
"github.com/oklog/ulid"
)
func main() {
t := time.Now().UTC()
entropy := rand.New(rand.NewSource(t.UnixNano()))
id := ulid.MustNew(ulid.Timestamp(t), entropy)
fmt.Printf("github.com/oklog/ulid: %s\n", id.String())
}
//github.com/oklog/ulid: 01GHTG8V9HC9NJPFGGZB9RV4M9
</code></pre>
<h1 id="githubcomsonysonyflake">github.com/sony/sonyflake</h1>
<pre><code class="language-go">package main
import (
"fmt"
"github.com/sony/sonyflake"
)
func main() {
flake := sonyflake.NewSonyflake(sonyflake.Settings{})
id, err := flake.NextID()
if err != nil {
fmt.Printf("flake.NextID() failed with %s\n", err)
}
fmt.Printf("github.com/sony/sonyflake: %x\n", id)
}
//github.com/sony/sonyflake: 6070cf552000bc8
</code></pre>
<h1 id="githubcomchiltssid">github.com/chilts/sid</h1>
<pre><code class="language-go">package main
import (
"fmt"
"github.com/chilts/sid"
)
func genSid() {
id := sid.Id()
fmt.Printf("github.com/chilts/sid: %s\n", id)
}
//github.com/chilts/sid: 1668410535227050000-0834787600488830456
</code></pre>
</div>
<div id="MySignature" role="contentinfo">
<p>本文来自博客园，作者：厚礼蝎，转载请注明原文链接：https://www.cnblogs.com/guangdelw/p/16891643.html</p><br><br>
来源：https://www.cnblogs.com/guangdelw/p/16891643.html
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