golang操作redis主要有两个库，go-redis和redigo
go-redis对函数的封装更简洁, 而且支持连接哨兵及集群模式的Redis

import “github.com/go-redis/redis/v8”

1 连接redisServer

(1) 法一

  1. import "github.com/go-redis/redis/v8"
  3. rdb = redis.NewClient(&redis.Options{
  4.     Addr:      "localhost:6379",
  5.     Password: "", // no password set
  6.     DB:          0,  // use default DB
  7. })

(2) 法二

  1. opt, err := redis.ParseURL("redis://<user>:<pass>@localhost:6379/<db>")
  2. if err != nil {
  3.     panic(err)
  4. }
  6. rdb = redis.NewClient(opt)

2 set/get

  1. func redisExample() {
  2.     rdb := RedisClient
  3.     err := rdb.Set("score", 100, 0).Err()
  4.     if err != nil {
  5.         fmt.Printf("set score failed, err:%v\n", err)
  6.         return
  7.     }
  9.     val, err := rdb.Get("score").Result()
  10.     if err != nil {
  11.         fmt.Printf("get score failed, err:%v\n", err)
  12.         return
  13.     }
  14.     fmt.Println("score", val)
  16.     val2, err := rdb.Get("name").Result()
  17.     if err == redis.Nil {
  18.         fmt.Println("name does not exist")
  19.     } else if err != nil {
  20.         fmt.Printf("get name failed, err:%v\n", err)
  21.         return
  22.     } else {
  23.         fmt.Println("name", val2)
  24.     }
  25. }

3 zset

  1. func redisExample2() {
  2.     zsetKey := "language_rank"
  3.     languages := []redis.Z{
  4.         {Score: 90.0, Member: "Golang"},
  5.         {Score: 98.0, Member: "Java"},
  6.         {Score: 95.0, Member: "Python"},
  7.         {Score: 97.0, Member: "JavaScript"},
  8.         {Score: 99.0, Member: "C/C++"},
  9.     }
  10.     // ZADD
  11.     num, err := rdb.ZAdd(zsetKey, languages...).Result()
  12.     if err != nil {
  13.         fmt.Printf("zadd failed, err:%v\n", err)
  14.         return
  15.     }
  16.     fmt.Printf("zadd %d succ.\n", num)
  18.     // 把Golang的分数加10
  19.     newScore, err := rdb.ZIncrBy(zsetKey, 10.0, "Golang").Result()
  20.     if err != nil {
  21.         fmt.Printf("zincrby failed, err:%v\n", err)
  22.         return
  23.     }
  24.     fmt.Printf("Golang's score is %f now.\n", newScore)
  26.     // 取分数最高的3个
  27.     ret, err := rdb.ZRevRangeWithScores(zsetKey, 0, 2).Result()
  28.     if err != nil {
  29.         fmt.Printf("zrevrange failed, err:%v\n", err)
  30.         return
  31.     }
  32.     for _, z := range ret {
  33.         fmt.Println(z.Member, z.Score)
  34.     }
  36.     // 取95~100分的
  37.     op := redis.ZRangeBy{
  38.         Min: "95",
  39.         Max: "100",
  40.     }
  41.     ret, err = rdb.ZRangeByScoreWithScores(zsetKey, op).Result()
  42.     if err != nil {
  43.         fmt.Printf("zrangebyscore failed, err:%v\n", err)
  44.         return
  45.     }
  46.     for _, z := range ret {
  47.         fmt.Println(z.Member, z.Score)
  48.     }
  49. }