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Redis Java 基本操作

Redis Java 基本操作

作者: 一颗北上广的心 | 来源:发表于2017-09-29 16:53 被阅读0次
    package yz20537.redis_test;
    
    import java.util.Date;
    import java.util.HashMap;
    import java.util.Map;
    
    import redis.clients.jedis.Jedis;
    
    public class App {
    
        static Jedis jedis = new Jedis("localhost");
    
        public static void main(String[] args) {
            // connect();
            // testKey();
            // testString();
            // testHash();
            // testList();
            // testSet();
            testSortedSet();
    
            jedis.close();
        }
    
        static void testKey() {
            // set key value --set key and value
            jedis.set("name", "wahaha");
            // del key -- delete key
            jedis.del("name");
            // exists key -- if exists
            jedis.set("name", "wahaha");
            System.out.println(jedis.exists("name"));
            // expire aaa 10 -- set the timeout 10s
            jedis.expire("name", 10);
            System.out.println(jedis.ttl("name"));
            // pexpire aaa 5000 -- set timeout 5000mm
            jedis.pexpire("name", 1000L);
            System.out.println(jedis.ttl("name"));
            // expireat aaa 1504771560 --set timeout at unixstamp
            jedis.expireAt("name", new Date().getTime() / 1000 + 10L);
            System.out.println(jedis.ttl("name"));
            // set always live
            jedis.persist("name");
            System.out.println(jedis.ttl("name"));
            // show all keys
            System.out.println(jedis.keys("*"));
        }
    
        static void testString() {
            jedis.flushAll();
    
            // set name zouyufei
            jedis.set("name", "wahaha");
            // get name
            System.out.println(jedis.get("name"));
            // mset name zouyufei age 20 (multi set)
            jedis.mset("name", "wahaha", "age", "20");
            // mget
            System.out.println(jedis.mget("name", "age"));
            // getrange name 1 3 (index from 0)
            System.out.println(jedis.getrange("name", 0, 2));
            // setrange name 7 aa (name = name from 0-7 + aa)
            jedis.setrange("name", 4, "!#");
            System.out.println(jedis.get("name"));
            // setex gender 10 male (set gender=male, and timeout=10s)
            jedis.setex("gender", 10, "male");
            System.out.println(jedis.get("gender") + "\t" + jedis.ttl("gender"));
            // setnx name zouyf (set name=zouyf if name doesn't exist)
            jedis.setnx("name", "abc");
            jedis.setnx("height", "180cm");
            System.out.println(jedis.mget("name", "height"));
            // msetnx name zouyufei age 20 (multi set when all keys don't exist)
            jedis.msetnx("food", "abc", "weight", "100kg");
            System.out.println(jedis.mget("food", "weight"));
            // strlen name (get name length)
            System.out.println(jedis.strlen("name"));
            // incr age (age ++)
            jedis.incr("age");
            System.out.println(jedis.get("age"));
            // incrby age 10 (age+=10)
            jedis.incrBy("age", 20);
            System.out.println(jedis.get("age"));
            // decr age (age--)
            jedis.decr("age");
            System.out.println(jedis.get("age"));
            // decrby age 10 (age -=10)
            jedis.decrBy("age", 20);
            System.out.println(jedis.get("age"));
            // append name dtc (name=name+dtc)
            jedis.append("food", "fruit");
            System.out.println(jedis.get("food"));
        }
    
        static void testHash() {
            jedis.flushAll();
    
            // hset mac cpu i7
            jedis.hset("hash", "cpu", "i7");
            // hmset mac cpu i5 memory 10G price 4999 (set multi)
            Map<String, String> keyvalues = new HashMap<String, String>();
            keyvalues.put("memory", "4GB");
            keyvalues.put("disk", "400GB");
            keyvalues.put("price", "400");
            jedis.hmset("hash", keyvalues);
            // hget mac cpu
            System.out.println(jedis.hget("hash", "cpu"));
            // hmget mac screen memory (get multi )
            System.out.println(jedis.hmget("hash", "cpu", "disk"));
            // hgetall mac
            System.out.println(jedis.hgetAll("hash"));
            // hdel mac address screen (delete address and screen from mac)
            jedis.hdel("hash", "cpu", "disk");
            // hexists mac name
            System.out.println(jedis.hexists("hash", "cpu"));
            // hincrby mac price 10 (mac's price +=10)
            jedis.hincrBy("hash", "price", 100);
            // hkeys mac (get all keys in mac)
            System.out.println(jedis.hkeys("hash"));
            // hlen mac (key count)
            System.out.println(jedis.hlen("hash"));
            // hsetnx mac cpu i8 (set value only key doesn't exist)
            jedis.hsetnx("hash", "cpu", "i8");
            // hvals mac (get all values)
            System.out.println(jedis.hvals("hash"));
        }
    
        static void testList() {
            jedis.flushAll();
    
            // lpushx list 6 (if list doesn't exist, do nothing)
            jedis.lpushx("list", "a");
            System.out.println(jedis.lrange("list", 0, -1));
            // lpush list 1 (if list doesn't exist, create the list)
            jedis.lpush("list", "a", "b", "c", "d", "e", "f");
            System.out.println(jedis.lrange("list", 0, -1));
            // lindex list 2 (get the second element)
            System.out.println(jedis.lindex("list", 1));
            // llen list (get length)
            System.out.println(jedis.llen("list"));
            // lpop list (get first element from left - head)
            System.out.println(jedis.lpop("list"));
            System.out.println(jedis.lrange("list", 0, -1));
            // lrem list 2 5 (remove 5 twice from head)
            jedis.lrem("list", 1, "a");
            System.out.println(jedis.lrange("list", 0, -1));
            // lset list 0 100 (set the first element from left to 100)
            jedis.lset("list", 0, "100");
            System.out.println(jedis.lrange("list", 0, -1));
            // ltrim list 0 4 (remain from [0,4] elements)
            jedis.ltrim("list", 0, 2);
            System.out.println(jedis.lrange("list", 0, -1));
            // rpoplpush list list (pop first element from right and push to list
            // from left)
            jedis.rpoplpush("list", "list1");
            System.out.println(jedis.lrange("list1", 0, -1));
            // rpush list 2 3 4 (push the elements from right)
            jedis.rpush("list", "1", "2", "3");
            System.out.println(jedis.lrange("list", 0, -1));
            // rpushx list 6 (if list doesn't exist, do nothing)
            // rpop list (get first element from right - tail)
            jedis.rpop("list");
            System.out.println(jedis.lrange("list", 0, -1));
    
        }
    
        static void testSet() {
            // sadd set 1 2 3 4
            jedis.sadd("set", "1", "1", "2", "3", "4", "7", "8");
            // smembers set (show all)
            System.out.println(jedis.smembers("set"));
            // srem set 4 (remove)
            jedis.srem("set", "3");
            System.out.println(jedis.smembers("set"));
            // scard set (show size)
            System.out.println(jedis.scard("set"));
            // sdiff set set1 (get the difference between set and set1)
            jedis.sadd("set1", "1", "5");
            System.out.println(String.format("set:%s, set1:%s, diff:%s", jedis.smembers("set"), jedis.smembers("set1"), jedis.sdiff("set", "set1")));
            System.out.println(String.format("set:%s, set1:%s, diff:%s", jedis.smembers("set"), jedis.smembers("set1"), jedis.sdiff("set1", "set")));
            // sdiffstore diffset set set1
            jedis.sdiffstore("setdiff", "set1", "set");
            System.out.println(jedis.smembers("setdiff"));
            // sinter set set1 (交集)
            System.out.println(jedis.sinter("set", "set1"));
            // sinterstore interset set set1
            jedis.sinterstore("interset", "set", "set1");
            System.out.println(jedis.smembers("interset"));
            // sunion set set1 (并集)
            System.out.println(jedis.sunion("set", "set1"));
            // sunionstore unionset set set1
            jedis.sunionstore("unionset", "set", "set1");
            System.out.println(jedis.smembers("unionset"));
            // sismember set 1 (if 1 belongs to set)
            System.out.println(jedis.sismember("set", "3"));
            // smove set set1 1 (move 1 from set to set1)
            jedis.smove("set", "mset", "1");
            System.out.println(jedis.smembers("set"));
            System.out.println(jedis.smembers("mset"));
            // spop set 2 (drop 2 elements randomly from set)
            jedis.spop("set", 2);
            System.out.println(jedis.smembers("set"));
            // srandmember set 2 (get 2 elements randomly from set)
            System.out.println(jedis.srandmember("set", 1));
        }
    
        static void testSortedSet() {
            jedis.flushAll();
            // zadd zet 1 a 2 b 3 c (add a,b,c with weight 1 2 3)
            jedis.zadd("zet", 90, "cpu");
            jedis.zadd("zet", 91, "memory");
            jedis.zadd("zet", 92, "disk");
            jedis.zadd("zet", 93, "screen");
            System.out.println(jedis.zrange("zet", 0, -1));
            // zrem zet a
            jedis.zrem("zet", "disk");
            System.out.println(jedis.zrange("zet", 0, -1));
            // zrank zet a (show the index of a order by score asc- from 0)
            System.out.println(jedis.zrank("zet", "disk"));
            // zrevrank zet2 a (show the index of a order by score desc)
            System.out.println(jedis.zrevrank("zet", "cpu"));
            // zscore zet1 a(show the score of a)
            System.out.println(jedis.zscore("zet", "cpu"));
    
            // zcard zet (size)
            System.out.println(jedis.zcard("zet"));
            // zcount zet 1 2 (get the count whose score between 1 and 2)
            System.out.println(jedis.zcount("zet", 90, 92));
            // zincrby zet 10 a (add 10 to the weight of a)
            jedis.zincrby("zet", 100, "cpu");
            System.out.println(jedis.zscore("zet", "cpu"));
            // zinterstore interzet 2 zet zet1 (交集)
            jedis.zadd("zet1", 93, "screen");
            jedis.zadd("zet1", 99, "mouse");
            jedis.zinterstore("interZet", "zet", "zet1");
            System.out.println(jedis.zrange("interZet", 0, -1));
            // zunionstore unionzet 2 zet zet1(并集)
            jedis.zunionstore("unionZet", "zet", "zet1");
            System.out.println(jedis.zrange("unionZet", 0, -1));
            // zremrangebyscore zet 0 4 (remove elements whose score between 0 and
            // 4)
            jedis.zremrangeByScore("zet", 0, 100);
            // zrevrange zet1 0 1(get the last 2 elements)
            System.out.println(jedis.zrevrange("zet", 0, 2));
            System.out.println(jedis.zrange("zet", 0, -1));
    
            // 当有序集合的所有成员都具有相同的分值时, 有序集合的元素会根据成员的字典序(lexicographical ordering)来进行排序,
            // 而这个命令则可以返回给定的有序集合键 key 中, 值介于 min 和 max 之间的成员。
            // 如果有序集合里面的成员带有不同的分值, 那么命令返回的结果是未指定的(unspecified)。
            // zrangebylex zet1 [a [c (show the elements whose score between a and
            // c's score)]
            System.out.println(jedis.zrangeByLex("zet", "[cpu", "[disk"));
            // zremrangebylex zet [a [b (remove elements whose score between a and
            // b's)
            System.out.println("before remove by lex:" + jedis.zrange("zet", 0, -1));
            jedis.zremrangeByLex("zet", "[cpu", "[disk");
            System.out.println("remove by lex:" + jedis.zrange("zet", 0, -1));
            // zlexcount zet1 [a [b (get the count which weight between a and b
            // weight )
            System.out.println(jedis.zlexcount("zet", "[cpu", "[disk"));
    
        }
    }
    
    

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