Go实战--golang中使用redis(redigo和go-redis/redis)
go get github.com/alphazero/Go-Redis 目前这五种 开源库redigo的使用github地址: 文档地址: 获取: go get github.com/garyburd/redigo/redis 连接redis package main import ( "fmt" "github.com/garyburd/redigo/redis" ) func main() { c,err := redis.Dial("tcp","127.0.0.1:6379") if err != nil { fmt.Println("Connect to redis error",err) return } defer c.Close() } 读写 package main import ( "fmt" "github.com/garyburd/redigo/redis" ) func main() { c,err) return } defer c.Close() _,err = c.Do("SET","mykey","superWang") if err != nil { fmt.Println("redis set failed:",err) } username,err := redis.String(c.Do("GET","mykey")) if err != nil { fmt.Println("redis get failed:",err) } else { fmt.Printf("Get mykey: %v n",username) } } 如何设置过期呢,可以使用SET的附加参数: package main import ( "fmt" "time" "github.com/garyburd/redigo/redis" ) func main() { c,"superWang","EX","5") if err != nil { fmt.Println("redis set failed:",username) } time.Sleep(8 * time.Second) username,err = redis.String(c.Do("GET",username) } } 输出: 批量写入读取 MGET key [key …] 批量写入读取对象(Hashtable) 检测值是否存在 package main import ( "fmt" "github.com/garyburd/redigo/redis" ) func main() { c,err) } is_key_exit,err := redis.Bool(c.Do("EXISTS","mykey1")) if err != nil { fmt.Println("error:",err) } else { fmt.Printf("exists or not: %v n",is_key_exit) } } 输出: 删除 package main import ( "fmt" "github.com/garyburd/redigo/redis" ) func main() { c,username) } _,err = c.Do("DEL","mykey") if err != nil { fmt.Println("redis delelte failed:",username) } } 输出: 读写json到redis package main import ( "encoding/json" "fmt" "github.com/garyburd/redigo/redis" ) func main() { c,err) return } defer c.Close() key := "profile" imap := map[string]string{"username": "666","phonenumber": "888"} value,_ := json.Marshal(imap) n,err := c.Do("SETNX",key,value) if err != nil { fmt.Println(err) } if n == int64(1) { fmt.Println("success") } var imapGet map[string]string valueGet,err := redis.Bytes(c.Do("GET",key)) if err != nil { fmt.Println(err) } errShal := json.Unmarshal(valueGet,&imapGet) if errShal != nil { fmt.Println(err) } fmt.Println(imapGet["username"]) fmt.Println(imapGet["phonenumber"]) } 设置过期时间 // 设置过期时间为24小时 n,_ := rs.Do("EXPIRE",24*3600) if n == int64(1) { fmt.Println("success") } 列表操作 redis 127.0.0.1:6379> LPUSH runoobkey redis (integer) 1 redis 127.0.0.1:6379> LPUSH runoobkey mongodb (integer) 2 redis 127.0.0.1:6379> LPUSH runoobkey mysql (integer) 3 redis 127.0.0.1:6379> LRANGE runoobkey 0 10 1) "mysql" 2) "mongodb" 3) "redis" 代码实现: package main import ( "fmt" "github.com/garyburd/redigo/redis" ) func main() { c,err = c.Do("lpush","runoobkey","redis") if err != nil { fmt.Println("redis set failed:",err) } _,"mongodb") if err != nil { fmt.Println("redis set failed:",err) } _,"mysql") if err != nil { fmt.Println("redis set failed:",err) } values,_ := redis.Values(c.Do("lrange","0","100")) for _,v := range values { fmt.Println(string(v.([]byte))) } } 输出: 管道 请求/响应服务可以实现持续处理新请求,即使客户端没有准备好读取旧响应。这样客户端可以发送多个命令到服务器而无需等待响应,最后在一次读取多个响应。这就是管道化(pipelining),这个技术在多年就被广泛使用了。距离,很多POP3协议实现已经支持此特性,显著加速了从服务器下载新邮件的过程。 连接支持使用Send(),Flush(),Receive()方法支持管道化操作 Send(commandName string,args ...interface{}) error Flush() error Receive() (reply interface{},err error) Send向连接的输出缓冲中写入命令。Flush将连接的输出缓冲清空并写入服务器端。Recevie按照FIFO顺序依次读取服务器的响应。下例展示了一个简单的管道: c.Send("SET","foo","bar") c.Send("GET","foo") c.Flush() c.Receive() // reply from SET v,err = c.Receive() // reply from GET Do方法组合了Send,Flush和 Receive方法。Do方法先写入命令,然后清空输出buffer,最后接收全部挂起响应包括Do方发出的命令的结果。如果任何响应中包含一个错误,Do返回错误。如果没有错误,Do方法返回最后一个响应。 开源库go-redis/redis的使用github地址: 文档地址: 获取: go get -u github.com/go-redis/redis 应用: package main import ( "fmt" "github.com/go-redis/redis" ) func main() { client := redis.NewClient(&redis.Options{ Addr: "127.0.0.1:6379",Password: "",// no password set DB: 0,// use default DB }) pong,err := client.Ping().Result() fmt.Println(pong,err) err = client.Set("key","value",0).Err() if err != nil { panic(err) } val,err := client.Get("key").Result() if err != nil { panic(err) } fmt.Println("key",val) val2,err := client.Get("key2").Result() if err == redis.Nil { fmt.Println("key2 does not exists") } else if err != nil { panic(err) } else { fmt.Println("key2",val2) } } 输出: PONG key value key2 does not exists (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |