golang redis

安装

下载第三方包:

go get -u github.com/go-redis/redis

连接

// 定义一个rdis客户端
var redisdb *redis.Client
// 初始化
func initClient() (err error) {
    redisdb = redis.NewClient(&redis.Options{
        Addr:     "localhost:6379", // post端口
        Password: "", // 密码
        DB:       0,  // 使用redis的库
    })
    _, err = redisdb.Ping().Result()
    if err != nil {
        fmt.Println("连接失败")
        return 
    }
    return 
}

使用

set/get示例

func redisExample() {
    err := redisdb.Set("score", 100, 0).Err()
    if err != nil {
        fmt.Printf("set score failed, err:%v\n", err)
        return
    }
    val, err := redisdb.Get("score").Result()
    if err != nil {
        fmt.Printf("get score failed, err:%v\n", err)
        return
    }
    fmt.Println("score", val)
    val2, err := redisdb.Get("name").Result()
    if err == redis.Nil {
        fmt.Println("name does not exist")
    } else if err != nil {
        fmt.Printf("get name failed, err:%v\n", err)
        return
    } else {
        fmt.Println("name", val2)
    }
}

zset示例

func redisExample2() {
    zsetKey := "language_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++"},
    }
    // ZADD
    num, err := redisdb.ZAdd(zsetKey, languages...).Result()
    if err != nil {
        fmt.Printf("zadd failed, err:%v\n", err)
        return
    }
    fmt.Printf("zadd %d succ.\n", num)
    // 把Golang的分数加10
    newScore, err := redisdb.ZIncrBy(zsetKey, 10.0, "Golang").Result()
    if err != nil {
        fmt.Printf("zincrby failed, err:%v\n", err)
        return
    }
    fmt.Printf("Golang's score is %f now.\n", newScore)
    // 取分数最高的3个
    ret, err := redisdb.ZRevRangeWithScores(zsetKey, 0, 2).Result()
    if err != nil {
        fmt.Printf("zrevrange failed, err:%v\n", err)
        return
    }
    for _, z := range ret {
        fmt.Println(z.Member, z.Score)
    }
    // 取95~100分的
    op := &redis.ZRangeBy{
        Min: "95",
        Max: "100",
    }
    ret, err = redisdb.ZRangeByScoreWithScores(zsetKey, op).Result()
    if err != nil {
        fmt.Printf("zrangebyscore failed, err:%v\n", err)
        return
    }
    for _, z := range ret {
        fmt.Println(z.Member, z.Score)
    }
}

输出结果如下：

$ ./06redis_demo 
zadd 0 succ.
Golang's score is 100.000000 now.
Golang 100
C/C++ 99
Java 98
JavaScript 97
Java 98
C/C++ 99
Golang 100