零基礎學習Redis(13) -- Java使用Redis命令

上期我們學習了如何使用Java連接到redis，這期我們來學習如何在java中使用redis中的一些命令

1. set/get

可以看到jedis類中提供了很多set方法

    public static void test1(Jedis jedis) {jedis.flushAll();jedis.set("key1", "v1");jedis.set("key2", "v2");jedis.set("key3", "v3");System.out.println(jedis.get("key2"));}

調用結果：

可以看到成功輸出了v2

我們也可以使用

String set(String var1, String var2, SetParams var3);

來使用帶參數的set命令，我們需要先創建一個SetParams對象，這個對象中有一些參數相關的方法：

    public static void test1(Jedis jedis) {jedis.flushAll();jedis.set("key1", "v1");jedis.set("key2", "v2");jedis.set("key3", "v3");SetParams params = new SetParams();params.ex(10);//設置超時時間params.xx();//設置key存在才能創建jedis.set("key2", "666", params);System.out.println(jedis.get("key2"));System.out.println(jedis.ttl("key2"));}

2. exists / del?

    public static void test2(Jedis jedis) {jedis.flushAll();jedis.set("key1", "v1");jedis.set("key2", "v2");jedis.set("key3", "v3");System.out.println(jedis.exists("key3"));jedis.del("key3");System.out.println(jedis.exists("key3"));}

這里的del方法是支持變長參數的可以在參數列表中寫多個參數來一次刪除多個?

3. keys

    public static void test3(Jedis jedis) {jedis.flushAll();jedis.set("key1", "v1");jedis.set("key2", "v2");jedis.set("key3", "v3");Set<String> set = jedis.keys("*");System.out.println(set);}

?4. expire / pexire / type

    public static void test4(Jedis jedis) throws InterruptedException {jedis.flushAll();jedis.set("key1", "v1");jedis.set("key2", "123");jedis.set("key3", "v3");jedis.expire("key1", 5);jedis.pexpire("key2", 3000);sleep(2000);System.out.println(jedis.ttl("key1"));System.out.println(jedis.ttl("key2"));System.out.println(jedis.ttl("key3"));System.out.println("key1 type: " + jedis.type("key1"));}

5. String 類型命令

5.1 megt / mset

    public static void string1(Jedis jedis) throws InterruptedException {jedis.flushAll();jedis.mset("key1", "v1", "key2", "v2", "key3", "v3");List<String> list = jedis.mget("key1", "key666", "key2", "key3");System.out.println(list);}

5.2 getrange?/setrange

    public static void string2(Jedis jedis) throws InterruptedException {jedis.flushAll();jedis.set("key1", "012345678");System.out.println(jedis.getrange("key1", 0, -1));System.out.println(jedis.getrange("key1", 2, 6));jedis.setrange("key1", 2, "abx");System.out.println(jedis.get("key1"));}

5.3 append / incr /incrby / decr /decrby?

    public static void string3(Jedis jedis) throws InterruptedException {jedis.flushAll();jedis.set("key1", "012345678");System.out.println(jedis.append("key1", "abc"));System.out.println(jedis.get("key1"));jedis.set("key2", "100");System.out.println(jedis.incr("key2"));System.out.println(jedis.incrBy("key2", 12));System.out.println(jedis.decrBy("key2", 12));System.out.println(jedis.decr("key2"));}

6. list命令?

6.1 lpush / rpush / lrange

    public static void list1(Jedis jedis)  {jedis.flushAll();jedis.lpush("list1", "111", "222", "333");jedis.rpush("list1", "000");System.out.println(jedis.lrange("list1", 0, -1));}

6.2 lpop /rpop

    public static void list2(Jedis jedis)  {jedis.flushAll();jedis.lpush("list1", "111", "222", "333");jedis.rpush("list1", "000");System.out.println(jedis.lrange("list1", 0, -1));System.out.println(jedis.lpop("list1"));System.out.println(jedis.lrange("list1", 0, -1));System.out.println(jedis.rpop("list1"));System.out.println(jedis.lrange("list1", 0, -1));}

6.3 blpop / brpop?

    public static void list3(Jedis jedis)  {jedis.flushAll();jedis.lpush("list1", "111", "222", "333");jedis.rpush("list1", "000");System.out.println(jedis.blpop(3, "list1"));System.out.println(jedis.brpop(3, "list1"));}

6.4? linsert / lindex / lset

    public static void list4(Jedis jedis)  {jedis.flushAll();jedis.lpush("list1", "111", "222", "333");jedis.rpush("list1", "000");System.out.println(jedis.lrange("list1", 0, -1));System.out.println(jedis.lindex("list1", 2));System.out.println(jedis.lset("list1", 2, "666"));System.out.println(jedis.linsert("list1", ListPosition.BEFORE, "666", "999"));System.out.println(jedis.lrange("list1", 0, -1));}

7. set命令?

7.1 sadd / smembers / sismember / scard / spop?

    public static void set1(Jedis jedis)  {jedis.flushAll();jedis.sadd("set1","000", "111", "222", "333");System.out.println(jedis.smembers("set1"));System.out.println(jedis.sismember("set1", "111"));System.out.println(jedis.sismember("set1", "666"));System.out.println(jedis.scard("set1"));System.out.println(jedis.spop("set1", 2));System.out.println(jedis.smembers("set1"));}

?7.2 sinter / sinterstore

    public static void set2(Jedis jedis)  {jedis.flushAll();jedis.sadd("set1","000", "111", "222", "333");jedis.sadd("set2","000", "111", "55", "666");System.out.println(jedis.sinter("set1", "set2"));System.out.println(jedis.sinterstore("set3", "set1", "set2"));System.out.println(jedis.smembers("set3"));}

8. hash類型命令?

8.1 hset / hmset / hget / hmget / hdel

    public static void hash1(Jedis jedis)  {jedis.flushAll();jedis.hset("hash1", "filed1", "v1");Map<String, String> map = new HashMap<>();map.put("filed2", "v2");map.put("filed3", "v3");map.put("filed4", "v4");jedis.hmset("hash1", map);System.out.println(jedis.hmget("hash1", "filed1", "filed2", "filed3", "filed4"));System.out.println(jedis.hdel("hash1", "filed", "filed1"));System.out.println(jedis.hmget("hash1", "filed1", "filed2", "filed3", "filed4"));}

?8.2 hkeys / hvals / hgetall / hlen

    public static void hash2(Jedis jedis)  {jedis.flushAll();jedis.hset("hash1", "filed1", "v1");Map<String, String> map = new HashMap<>();map.put("filed2", "v2");map.put("filed3", "v3");map.put("filed4", "v4");jedis.hmset("hash1", map);System.out.println(jedis.hlen("hash1"));System.out.println(jedis.hkeys("hash1"));System.out.println(jedis.hvals("hash1"));System.out.println(jedis.hgetAll("hash1"));}

8.3 hincrby / hincrbyfloat

    public static void hash3(Jedis jedis)  {jedis.flushAll();Map<String, String> map = new HashMap<>();map.put("filed2", "12");map.put("filed3", "10");map.put("filed4", "er");jedis.hmset("hash1", map);System.out.println(jedis.hincrBy("hash1", "filed2", 23));System.out.println(jedis.hincrByFloat("hash1", "filed3", -12.5));System.out.println(jedis.hgetAll("hash1"));
//        System.out.println(jedis.hincrBy("hash1", "filed4", 1)); // 報錯}

9. zset命令?

9.1 zadd / zrange / zrevrange?

    public static void zset1(Jedis jedis)  {jedis.flushAll();jedis.zadd("zset1", 9, "a");Map<String, Double> map = new HashMap<>();map.put("b", 8D);map.put("c", 7D);map.put("d", 6D);jedis.zadd("zset1", 9, "a");jedis.zadd("zset1", map);System.out.println(jedis.zrange("zset1", 0, -1));System.out.println(jedis.zrangeWithScores("zset1", 0, -1));System.out.println(jedis.zrevrange("zset1", 0, -1));System.out.println(jedis.zrevrangeWithScores("zset1", 0, -1));}

9.2 zcard / zcount / zrangebyscore

    public static void zset2(Jedis jedis)  {jedis.flushAll();jedis.zadd("zset1", 9, "a");Map<String, Double> map = new HashMap<>();map.put("b", 8D);map.put("c", 7D);map.put("d", 6D);jedis.zadd("zset1", 9, "a");jedis.zadd("zset1", map);System.out.println(jedis.zcard("zset1"));System.out.println(jedis.zcount("zset1", 6, 8));System.out.println(jedis.zrangeByScore("zset1", 6, 8));System.out.println(jedis.zrangeByScoreWithScores("zset1", 6, 8));}

9.3 zpopmax / zpopmin / bzpopmax / bzpopmin?

    public static void zset3(Jedis jedis)  {jedis.flushAll();jedis.zadd("zset1", 9, "a");Map<String, Double> map = new HashMap<>();map.put("b", 8D);map.put("c", 7D);map.put("d", 6D);jedis.zadd("zset1", 9, "a");jedis.zadd("zset1", map);System.out.println(jedis.zrangeWithScores("zset1", 0, -1));System.out.println(jedis.zpopmax("zset1", 2));System.out.println(jedis.bzpopmin(1000, "zset1"));System.out.println(jedis.zrangeWithScores("zset1", 0, -1));}

?9.4 zrank / zrevrank / zscore / zrem

    public static void zset4(Jedis jedis)  {jedis.flushAll();jedis.zadd("zset1", 9, "a");Map<String, Double> map = new HashMap<>();map.put("b", 8D);map.put("c", 7D);map.put("d", 6D);jedis.zadd("zset1", 9, "a");jedis.zadd("zset1", map);System.out.println(jedis.zrank("zset1", "a"));System.out.println(jedis.zrevrank("zset1", "a"));System.out.println(jedis.zscore("zset1", "a"));System.out.println(jedis.zrem("zset1", "a", "b"));System.out.println(jedis.zrangeWithScores("zset1", 0, -1));}

9.5 zinterstore / zunionstore

    public static void zset5(Jedis jedis)  {jedis.flushAll();Map<String, Double> map = new HashMap<>();map.put("a", 9D);map.put("b", 8D);map.put("c", 7D);map.put("d", 6D);jedis.zadd("zset1", map);Map<String, Double> map2 = new HashMap<>();map2.put("a", 99D);map2.put("b", 0D);map2.put("e", 7D);map2.put("f", 6D);jedis.zadd("zset2", map2);//求交集保留大的score, key1權重為1， key2權重為2System.out.println(jedis.zinterstore("zset3", new ZParams().weights(1, 2).aggregate(ZParams.Aggregate.MAX), "zset1", "zset2"));//求交集保留大的score, key1權重為1， key2權重為2System.out.println(jedis.zunionstore("zset4", new ZParams().weights(1, 2).aggregate(ZParams.Aggregate.MAX), "zset1", "zset2"));System.out.println(jedis.zrangeWithScores("zset3", 0, -1));System.out.println(jedis.zrangeWithScores("zset4", 0, -1));}