Go語言基礎(chǔ)之操作Redis

Go語?基礎(chǔ)之操作RedisGo語?操作Redis在項?開發(fā)中redis的使?也?較頻繁，本?介紹了Go語?如何操作Redis。Redis介紹Redis是?個開源的內(nèi)存數(shù)據(jù)庫，Redis提供了5種不同類型的數(shù)據(jù)結(jié)構(gòu)，很多業(yè)務(wù)場景下的問題都可以很?然地映射到這些數(shù)據(jù)結(jié)構(gòu)上。除此之外，通過復(fù)制、持久化和客戶端分?等特性，我們可以很?便地將Redis擴展成?個能夠包含數(shù)百GB數(shù)據(jù)、每秒處理上百萬次請求的系統(tǒng)。Redis?持的數(shù)據(jù)結(jié)構(gòu)Redis?持諸如字符串（strings）、哈希（hashes）、列表（list）s、集合（sets）、帶范圍查詢的排序集合（sortedset）、s位圖（bitmaps）、hyperloglogs、帶半徑查詢和流的地理空間索引等數(shù)據(jù)結(jié)構(gòu)（geospatialindexes）。Redis應(yīng)?場景緩存系統(tǒng)，減輕主數(shù)據(jù)庫（MySQL）的壓?。計數(shù)場景，?如微博、抖?中的關(guān)注數(shù)和粉絲數(shù)。熱門排?榜，需要排序的場景特別適合使?ZSET。利?LIST可以實現(xiàn)隊列的功能。Redis與Memcached?較Memcached中的值只?持簡單的字符串，Reids?持更豐富的5中數(shù)據(jù)結(jié)構(gòu)類型。Redis的性能?Memcached好很多Redis?持RDB持久化和AOF持久化。Redis?持master/slave模式。Go操作Redis安裝goget-u/go-redis/redis連接//聲明?個全局的redisdb變量varredisdb*redis.Client//初始化連接funcinitClient()(errerror){redisdb=redis.NewClient(&redis.Options{"lAddr:ocalhost:6379","Password:,"http://nopasswordset0,//DB:usedefaultDB})_,err=redisdb.Ping().Result()iferr!=nil{returnerr}returnnil}基本使?set/get?例funcredisExample(){err:="sredisdb.Set(core",100,0).Err()iferr!=nil{"sfmt.Printf(etscorefailed,err:%v\n")return}val,err"s:=co)r.redisdb.Get(e"Result()iferr!=nil{"gfmt.Printetscorefa(iled,,err)err:%v\n"return}fmt.Println("score",val)val2,err"n:=am)e."redisdb.Get(Result()iferr==redis.Nil{"fmt.Println(nameelsei}ferr!=nil{"gfmt.Printf(etnamefailed,,errerr:%v\n")doesnot)exist"returnelse}{"fmt.Println(name",val2)}}zset?例funcredisExample2(){zsetKey"lan:=guage_rank"languages:=[]*redis.Z{&redis.Z{Score:90.0,Member:"Golang"},&redis.Z{Score:98.0,Member:"Java"},&redis.Z{Score:95.0,Member:"Python"},&redis.Z{Score:97.0,Member:"JavaScript"},&redis.Z{Score:99.0,Member:"C/C++"},}//ZADDnum,err:=redisdb.ZAdd(zsetKey,languages...).Result()iferr!=nil{"zfmt.Printf(addfailed,,ererr:%v\n"r)return}fmt.Printf("zadd%d,succ.\n"num)//把Golang的分數(shù)加10newScore,err:=redisdb.ZIncrBy(z10,."0Gol)a.nRge"sult()setKey,iferr!=nil{"zfmt.Printf(incrbyfailed,,err)err:%v\n"return}fmt.Printf("Golang'sscore,isnew%fSconow.\n"re)//取分數(shù)最?的3個ret,err:=redisdb.ZRevRangeWi0,2).ResulthScores(z()setKey,iferr!=nil{"zfmt.Printf(revrangefailed,,err)err:%v\n"return}for_,z:=rangeret{fmt.Println(z.Member,z.Score)}//取95~100分的op:=&redis.ZRangeBy{"9,5"Min:"10,0Max:"}ret,err=redisdb.ZRangeByScoreWithScores(zsetKey,op).Result()iferr!=nil{"zfmt.Printf(rangebyscorefailed,,err)err:%v\n"return}for_,z:=rangeret{fmt.Println(z.Member,z.Score)}}輸出結(jié)果如下：$./06redis_