reids命令可以參考中文官網：http://redis.cn/commands.html

關於reids的使用，可以封裝到工具類進行調用：

Redis的工具類：JedisAdapter

除了數據結構：reids還可以用來保持事務的一致性；例如：

1：關於Redis的事務：利用reids的exec命令保證執行，不然就discard回滾

例如聲明兩個方法：

Transaction multi(Jedis jedis)

List<Object> exec(Transaction tx, Jedis jedis)

    public Transaction multi(Jedis jedis) {
                
 
try {
                    return jedis.multi();
                } catch (Exception e) {
                    logger.error("發生異常" + e.getMessage());
                } finally {
                }
                return null;
            }
        
            public List<Object> exec(Transaction tx, Jedis jedis) {
                
 
try {
                    return tx.exec(); //保證事務執行
                } catch (Exception e) {
                    logger.error("發生異常" + e.getMessage());
                    tx.discard();   //回滾
                } finally {
                    if (tx != null) {
                        try {
                            tx.close();
                        } 
 
catch (IOException ioe) {
                            // ..
                        }
                    }
                    if (jedis != null) {
                        jedis.close();
                    }
                }
                return null;
            }

2：對於兩個方法的使用：

 public boolean follow(int userId, int entityType, int entityId) {
        String followerKey = RedisKeyUtil.getFollowerKey(entityType, entityId);
        String followeeKey = RedisKeyUtil.getFolloweeKey(userId, entityType);
        Date date = new Date();
        // 實體的粉絲增加當前用戶
        Jedis jedis = jedisAdapter.getJedis();
        Transaction tx = jedisAdapter.multi(jedis);
        tx.zadd(followerKey, date.getTime(), String.valueOf(userId));
        // 當前用戶對這類實體關註+1
        tx.zadd(followeeKey, date.getTime(), String.valueOf(entityId));
        List<Object> ret = jedisAdapter.exec(tx, jedis);
        return ret.size() == 2 && (Long) ret.get(0) > 0 && (Long) ret.get(1) > 0;
    }

followee/follower兩個隊列

3：常見的redis數據結構和使用：

   List：雙向列表，適用於最新列表，關註列表
   lpush
   lpop
   blpop
   lindex
   lrange
   lrem
   linsert
   lset
   rpush
Set：適用於無順序的集合，點贊點踩，抽獎，已讀，共同好友
  
   sdiff
   smembers
   sinter
   scard
 SortedSet：排行榜，優先隊列
  
   zadd
   zscore
   zrange
   zcount
   zrank
   zrevrank
 Hash：對象屬性，不定長屬性數
  
   hset
   hget
   hgetAll
   hexists
   hkeys
   hvals
 KV：單一數值，驗證碼，PV，緩存
   set
   setex
   incr
   

Jedis jedis = new Jedis("redis://localhost:6379/9");
jedis.flushDB();

// get set
jedis.set("hello", "world");
print(1, jedis.get("hello"));
jedis.rename("hello", "newhello");
print(1, jedis.get("newhello"));
jedis.setex("hello2", 1800, "world");

//
jedis.set("pv", "100");
jedis.incr("pv");
jedis.incrBy("pv", 5);//一次加五
print(2, jedis.get("pv"));
jedis.decrBy("pv", 2);
print(2, jedis.get("pv"));

print(3, jedis.keys("*"));//打印出來所有的key


//
String listName = "list";
jedis.del(listName);
for (int i = 0; i < 10; ++i) {
    jedis.lpush(listName, "a" + String.valueOf(i));
}
print(4, jedis.lrange(listName, 0, 12));
print(4, jedis.lrange(listName, 0, 3));
print(5, jedis.llen(listName));//長度
print(6, jedis.lpop(listName));//先進後出，pop
print(7, jedis.llen(listName));//長度
print(8, jedis.lrange(listName, 2, 6));
print(9, jedis.lindex(listName, 3));
print(10, jedis.linsert(listName, BinaryClient.LIST_POSITION.AFTER, "a4", "xx"));//插入
print(10, jedis.linsert(listName, BinaryClient.LIST_POSITION.BEFORE, "a4", "bb"));//刪除
print(11, jedis.lrange(listName, 0 ,12)) ;

// hash
String userKey = "userxx";
jedis.hset(userKey, "name", "jim");
jedis.hset(userKey, "age", "12");
jedis.hset(userKey, "phone", "18618181818");
print(12, jedis.hget(userKey, "name"));
print(13, jedis.hgetAll(userKey));
jedis.hdel(userKey, "phone");
print(14, jedis.hgetAll(userKey));
print(15, jedis.hexists(userKey, "email"));
print(16, jedis.hexists(userKey, "age"));
print(17, jedis.hkeys(userKey));
print(18, jedis.hvals(userKey));
jedis.hsetnx(userKey, "school", "zju");
jedis.hsetnx(userKey, "name", "yxy");
print(19, jedis.hgetAll(userKey));

// set集和
String likeKey1 = "commentLike1";
String likeKey2 = "commentLike2";
for (int i = 0; i < 10; ++i) {
    jedis.sadd(likeKey1, String.valueOf(i));
    jedis.sadd(likeKey2, String.valueOf(i*i));
}
print(20, jedis.smembers(likeKey1)); //smembers（key）取值
print(21, jedis.smembers(likeKey2));
print(22, jedis.sunion(likeKey1, likeKey2));//求並集
print(23, jedis.sdiff(likeKey1, likeKey2)); //補集
print(24, jedis.sinter(likeKey1, likeKey2));//交集
print(25, jedis.sismember(likeKey1, "12"));//判斷是否存在
print(26, jedis.sismember(likeKey2, "16"));//判斷
jedis.srem(likeKey1, "5");
print(27, jedis.smembers(likeKey1));
jedis.smove(likeKey2, likeKey1, "25"); //從一移進2一個25
print(28, jedis.smembers(likeKey1));
print(29, jedis.scard(likeKey1)); //求總和

String rankKey = "rankKey";//優先隊列zset（）
jedis.zadd(rankKey, 15, "jim");
jedis.zadd(rankKey, 60, "Ben");
jedis.zadd(rankKey, 90, "Lee");
jedis.zadd(rankKey, 75, "Lucy");
jedis.zadd(rankKey, 80, "Mei");
print(30, jedis.zcard(rankKey));// zcard（）輸出
print(31, jedis.zcount(rankKey, 61, 100));
print(32, jedis.zscore(rankKey, "Lucy"));
jedis.zincrby(rankKey, 2, "Lucy");
print(33, jedis.zscore(rankKey, "Lucy"));
jedis.zincrby(rankKey, 2, "Luc");
print(34, jedis.zscore(rankKey, "Luc"));
print(35, jedis.zrange(rankKey, 0, 100));
print(36, jedis.zrange(rankKey, 0, 10));//範圍輸出
print(36, jedis.zrange(rankKey, 1, 3));
print(36, jedis.zrevrange(rankKey, 1, 3));//從低到高排列
for (Tuple tuple : jedis.zrangeByScoreWithScores(rankKey, "60", "100")) {
    print(37, tuple.getElement() + ":" + String.valueOf(tuple.getScore()));
}

print(38, jedis.zrank(rankKey, "Ben"));
print(39, jedis.zrevrank(rankKey, "Ben"));

String setKey = "zset";
jedis.zadd(setKey, 1, "a");
jedis.zadd(setKey, 1, "b");
jedis.zadd(setKey, 1, "c");
jedis.zadd(setKey, 1, "d");
jedis.zadd(setKey, 1, "e");

print(40, jedis.zlexcount(setKey, "-", "+"));
print(41, jedis.zlexcount(setKey, "(b", "[d"));//不包含
print(42, jedis.zlexcount(setKey, "[b", "[d"));//包含，b到d
jedis.zrem(setKey, "b");
print(43, jedis.zrange(setKey, 0, 10));
jedis.zremrangeByLex(setKey, "(c", "+");
print(44, jedis.zrange(setKey, 0 ,2));

/*連接池
JedisPool pool = new JedisPool();
for (int i = 0; i < 100; ++i) {
    Jedis j = pool.getResource();
    print(45, j.get("pv"));
    j.close();
}*/

User user = new User();
user.setName("xx");
user.setPassword("ppp");
user.setHeadUrl("a.png");
user.setSalt("salt");
user.setId(1);
print(46, JSONObject.toJSONString(user));//序列化user
jedis.set("user1", JSONObject.toJSONString(user));

String value = jedis.get("user1");
User user2 = JSON.parseObject(value, User.class);//反序列化，轉化為user對象；
print(47, user2);
int k = 2;

Redis保證事務一致性，以及常用的數據結構