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零基础学习Redis(13) -- Java使用Redis命令

news 2025/8/12 20:45:37

上期我们学习了如何使用Java连接到redis，这期我们来学习如何在java中使用redis中的一些命令

1. set/get

可以看到jedis类中提供了很多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"));}

调用结果：

可以看到成功输出了v2

我们也可以使用

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

来使用带参数的set命令，我们需要先创建一个SetParams对象，这个对象中有一些参数相关的方法：

    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);//设置超时时间params.xx();//设置key存在才能创建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"));}

这里的del方法是支持变长参数的可以在参数列表中写多个参数来一次删除多个

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 类型命令

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类型命令

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)); // 报错}

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权重为1， key2权重为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权重为1， key2权重为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));}