Jedis

通過 Jedis 可以連接 Redis 服務器。

通過 Maven 引入 Jedis 依賴。

<!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
<dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>5.2.0</version>
</dependency>

連接 Redis 服務器。

這里設置了 ssh 端口轉發，將本地的 8888 端口轉發到遠程的 6379 端口。

還需修改 Redis 的配置文件：

1. 將 bind 的地址改為 0.0.0.0
2. 將 protected-mode 改為 no

public class RedisCon {public static void main(String[] args) {try (JedisPool jedisPool = new JedisPool("tcp://127.0.0.1:8888");Jedis jedis = jedisPool.getResource()) {String pong = jedis.ping(); // 測試連接System.out.println(pong);}}
}

通用命令

GET、SET

private static void getAndSet(Jedis jedis) {jedis.flushAll(); // TODO 清除所有鍵避免影響操作jedis.set("k1", "111");System.out.println(jedis.get("k1"));SetParams params = new SetParams(); // ? 設置額外參數params.ex(1);params.nx();jedis.set("k2", "222", params); // ? 相當于設置了 1s 過期時間和添加方式為 NX
//        Thread.sleep(2000);System.out.println(jedis.get("k2"));
}

輸出：

111
222 | null

EXISTS、DEL

private static void existsAndDel(Jedis jedis) {jedis.flushAll();jedis.set("k1", "111");jedis.set("k2", "111");long trueExists = jedis.exists("k1", "k2"); // ? 這里的參數為變長參數System.out.println(trueExists);long successDel = jedis.del("k2", "k3");System.out.println(successDel);
}

輸出：

2
1

KEYS

private static void keys(Jedis jedis) {jedis.flushAll();jedis.set("k1", "111");jedis.set("k2", "111");jedis.set("k3", "111");jedis.set("k4", "111");Set<String> keys = jedis.keys("*");System.out.println(keys);
}

輸出：

[k1, k2, k3, k4]

EXPIRE、TTL

private static void expiresAndTTL(Jedis jedis) {jedis.flushAll();jedis.set("k1", "111");jedis.expire("k1", 10);long time = jedis.ttl("k1");System.out.println(time);
}

輸出：

10

type

private static void type(Jedis jedis) {jedis.flushAll();jedis.set("k1", "111");System.out.println("type:" + jedis.type("k1"));jedis.lpush("k2", "111");System.out.println("type:" + jedis.type("k2"));jedis.hset("k3", "f1", "v1");System.out.println("type:" + jedis.type("k3"));jedis.sadd("k4", "111");System.out.println("type:" + jedis.type("k4"));jedis.zadd("k5", 30, "m1");System.out.println("type:" + jedis.type("k5"));
}

輸出：

type:string
type:list
type:hash
type:set
type:zset

string 類型

MSET、MGET

private static void msetAndMget(Jedis jedis) {jedis.flushAll();jedis.mset("k1", "111", "k2", "222", "k3", "你好");List<String> mgetRes = jedis.mget("k1", "k2", "k3", "k4");System.out.println(mgetRes);
}

輸出：

[111, 222, 你好, null]

SETRANGE、GETRANGE

private static void setrangeAndGetrange(Jedis jedis) {jedis.flushAll();jedis.set("k1", "hello world");String getrangeRes = jedis.getrange("k1", 6, 10);System.out.println(getrangeRes);jedis.setrange("k1", 6, "redis");System.out.println(jedis.getrange("k1", 0, -1));
}

輸出：

world
hello redis

APPEND

private static void append(Jedis jedis) {jedis.flushAll();jedis.set("k1", "It's MyGO");long appendRes = jedis.append("k1", "!!!!!");System.out.println(appendRes);System.out.println(jedis.get("k1"));
}

輸出：

10
It's MyGO!!!!!

INCR、DECR

private static void incrAndDecr(Jedis jedis) {jedis.flushAll();jedis.set("k1", "100");long incrRes = jedis.incr("k1");System.out.println(incrRes);jedis.set("k2", "100");long decrRes = jedis.decr("k2");System.out.println(decrRes);
}

輸出：

101
99

list 類型

LPUSH、LRANGE

private static void lpushAndLrange(Jedis jedis) {jedis.flushAll();jedis.lpush("k1", "111", "222", "333");List<String> lrangeRes = jedis.lrange("k1", 0, -1);System.out.println(lrangeRes);
}

輸出：

[333, 222, 111]

RPUSH

private static void rpush(Jedis jedis) {jedis.flushAll();jedis.rpush("k1", "111", "222", "333");List<String> lrangeRes = jedis.lrange("k1", 0, -1);System.out.println(lrangeRes);
}

輸出：

[111, 222, 333]

LPOP、RPOP

private static void lpopAndRpop(Jedis jedis) {jedis.flushAll();jedis.rpush("k1", "111", "222", "333");String res = jedis.lpop("k1");System.out.println(res);res = jedis.lpop("k1");System.out.println(res);res = jedis.lpop("k1");System.out.println(res);res = jedis.lpop("k1");System.out.println(res);jedis.rpush("k1", "111", "222", "333");res = jedis.rpop("k1");System.out.println(res);res = jedis.rpop("k1");System.out.println(res);res = jedis.rpop("k1");System.out.println(res);res = jedis.rpop("k1");System.out.println(res);
}

輸出：

333
222
111
null
333
222
111

BLPOP、LLEN

private static void blpopAndLlen(Jedis jedis) {jedis.flushAll();List<String> blpopRes = jedis.blpop(100, "k1");System.out.println("key:" + blpopRes.get(0));System.out.println("val:" + blpopRes.get(1));long len = jedis.llen("k1");System.out.println(len);
}

輸出：

key:k1
val:111
2

set 類型

SADD、SMEMBERS、SCARD

private static void saddAndSmembersAndScard(Jedis jedis) {jedis.flushAll();jedis.sadd("k1", "111", "222", "333");Set<String> smembersRes = jedis.smembers("k1");System.out.println(smembersRes);long len = jedis.scard("k1");System.out.println(len);
}

輸出：

[111, 222, 333]
3

SISMEMBER、SPOP

private static void sismemberAndSpop(Jedis jedis) {jedis.flushAll();jedis.sadd("k1", "111", "222", "333");boolean sismemberRes = jedis.sismember("k1", "111");System.out.println(sismemberRes);String spopRes = jedis.spop("k1");System.out.println(spopRes);spopRes = jedis.spop("k1");System.out.println(spopRes);spopRes = jedis.spop("k1");System.out.println(spopRes);spopRes = jedis.spop("k1");System.out.println(spopRes);
}

輸出：

true
111
222
333
null

SINTER、SINNTERSTORE

private static void sinterAndSinterstore(Jedis jedis) {jedis.flushAll();jedis.sadd("k1", "111", "222", "333");jedis.sadd("k2", "111", "222", "444");Set<String> sinterRes = jedis.sinter("k1", "k2");System.out.println(sinterRes);jedis.sinterstore("k3","k1", "k2");Set<String> res = jedis.smembers("k3");System.out.println(res);
}

輸出：

[111, 222]
[111, 222]

hash 類型

HSET、HGET

private static void hsetAndHget(Jedis jedis) {jedis.flushAll();jedis.hset("k1", "f1", "111");Map<String, String> fv = Map.of("f2", "222", "f3", "333");jedis.hset("k1", fv);String hgetRes = jedis.hget("k1", "f2");System.out.println(hgetRes);
}

輸出：

222

HEXISTS、HDEL

private static void hexistsAndHdel(Jedis jedis) {jedis.flushAll();Map<String, String> fv = Map.of("f1", "111", "f2", "222", "f3", "333");jedis.hset("k1", fv);boolean hexistsRes = jedis.hexists("k1", "f1");System.out.println(hexistsRes);long hdelRes = jedis.hdel("k1", "f1", "f2", "f3", "f4");System.out.println(hdelRes);
}

輸出：

true
3

HKEYS、HVALS

private static void hkeysAndHvals(Jedis jedis) {jedis.flushAll();Map<String, String> fv = Map.of("f1", "111", "f2", "222", "f3", "333");jedis.hset("k1", fv);Set<String> hkeysRes = jedis.hkeys("k1");System.out.println(hkeysRes);List<String> hvalsRes = jedis.hvals("k1");System.out.println(hvalsRes);
}

輸出：

[f1, f2, f3]
[111, 222, 333]

HMSET、HMGET

private static void hmsetAndHmget(Jedis jedis) {jedis.flushAll();Map<String, String> fv = Map.of("f1", "111", "f2", "222", "f3", "333");jedis.hmset("k1", fv);List<String> hmgetRes = jedis.hmget("k1", "f1", "f2", "f3", "f4");System.out.println(hmgetRes);
}

輸出：

[111, 222, 333, null]

Zset 類型

ZADD、ZRANGE

private static void zaddAndZrange(Jedis jedis) {jedis.flushAll();jedis.zadd("k1", 10.0, "zhangsan");Map<String, Double> ms = Map.of("lishi", 20.0, "wangwu", 30.0);jedis.zadd("k1", ms);List<String> zrangeRes = jedis.zrange("k1", 0, -1);System.out.println(zrangeRes);List<Tuple> membersWithScores = jedis.zrangeWithScores("k1", 0, -1);System.out.println(membersWithScores);System.out.println(membersWithScores.get(0).getElement());System.out.println(membersWithScores.get(0).getScore());
}

輸出：

[zhangsan, lishi, wangwu]
[[zhangsan,10.0], [lishi,20.0], [wangwu,30.0]]
zhangsan
10.0

ZCARD、ZREM

private static void zcardAndZrem(Jedis jedis) {jedis.flushAll();Map<String, Double> ms = Map.of("zhangsan", 10.0, "lishi", 20.0, "wangwu", 30.0);jedis.zadd("k1", ms);long zcardRes = jedis.zcard("k1");System.out.println(zcardRes);long zremRes = jedis.zrem("k1", "zhangsan", "lishi", "zhaoliu");System.out.println(zremRes);
}

輸出：

3
2

ZSCORE、ZRANK

private static void zscoreAndZrank(Jedis jedis) {jedis.flushAll();Map<String, Double> ms = Map.of("zhangsan", 10.0, "lishi", 20.0, "wangwu", 30.0);jedis.zadd("k1", ms);Double zscoreRes = jedis.zscore("k1", "zhangsan");System.out.println(zscoreRes);Long zrankRes = jedis.zrank("k1", "lishi");System.out.println(zrankRes);
}

輸出：

10.0
1

---

Spring Boot 集成 Redis

在創建 spring-boot 項目時，選擇 Redis 依賴。

在 application.yml 中配置 Redis 連接信息。

這里配置了端口轉發，正常輸入服務器的公網 IP 地址和 6379 端口即可。

spring:data:redis:port: 8888host: 127.0.0.1

string 類型

@RestController
public class StringController {@AutowiredStringRedisTemplate redisTemplate;@GetMapping("/string")public String string() {// TODO 先清除數據庫redisTemplate.execute((RedisConnection connection) -> {connection.flushAll();return null;});redisTemplate.opsForValue().set("k1", "111");Map<String, String> kv = Map.of("k2", "222", "k3", "333");redisTemplate.opsForValue().multiSet(kv);return redisTemplate.opsForValue().get("k1");}
}

輸出：

111

list 類型

@RestController
public class ListController {@AutowiredStringRedisTemplate redisTemplate;@GetMapping("/list")public List<String> list() {redisTemplate.execute((RedisConnection connection) -> {connection.flushAll();return null;});redisTemplate.opsForList().leftPush("k1", "111");redisTemplate.opsForList().leftPushAll("k1", "222", "333", "444");redisTemplate.opsForList().leftPop("k1");return redisTemplate.opsForList().range("k1", 0, -1);}
}

輸出：

["333","222","111"
]

set 類型

@RestController
public class SetController {@AutowiredStringRedisTemplate redisTemplate;@GetMapping("/set")public Set<String> set() {redisTemplate.execute((RedisConnection connection) -> {connection.flushAll();return null;});redisTemplate.opsForSet().add("k1", "111", "222", "333", "444");Long size = redisTemplate.opsForSet().size("k1");System.out.println("size:" + size);Boolean isMember = redisTemplate.opsForSet().isMember("k1", "222");System.out.println("isMember:" + isMember);Long remove = redisTemplate.opsForSet().remove("k1", "444");System.out.println("remove:" + remove);return redisTemplate.opsForSet().members("k1");}
}

輸出：

size:3
isMember:true
remove:1

["111","222","333"
]

hash 類型

@RestController
public class HashController {@AutowiredStringRedisTemplate redisTemplate;@GetMapping("/hash")public Map<Object, Object> hash() {redisTemplate.execute((RedisConnection connection) -> {connection.flushAll();return null;});redisTemplate.opsForHash().put("k1", "f1", "v1");Map<String, String> fv = Map.of("f2", "v2", "f3", "v3", "f4", "v4");redisTemplate.opsForHash().putAll("k1", fv);Long size = redisTemplate.opsForHash().size("k1");System.out.println("size:" + size);Boolean hasKey = redisTemplate.opsForHash().hasKey("k1", "f1");System.out.println("hasKey:" + hasKey);Long delete = redisTemplate.opsForHash().delete("k1", "f4");System.out.println("delete:" + delete);return redisTemplate.opsForHash().entries("k1");}
}

輸出：

size:4
hasKey:true
delete:1

{"f1": "v1","f3": "v3","f2": "v2"
}

zset 類型

@RestController
public class ZsetController {@AutowiredStringRedisTemplate redisTemplate;@GetMapping("/zset")public Set<ZSetOperations.TypedTuple<String>> zset() {redisTemplate.execute((RedisConnection connection) -> {connection.flushAll();return null;});redisTemplate.opsForZSet().add("k1", "zhangsan", 10.0);redisTemplate.opsForZSet().add("k1", "lishi", 20.0);redisTemplate.opsForZSet().add("k1", "wangwu", 30.0);redisTemplate.opsForZSet().add("k1", "zhaoliu", 40.0);Long remove = redisTemplate.opsForZSet().remove("k1", "wangwu");System.out.println("remove:" + remove);Long rank = redisTemplate.opsForZSet().rank("k1", "lishi");System.out.println("rank:" + rank);Long size = redisTemplate.opsForZSet().size("k1");System.out.println("size:" + size);return redisTemplate.opsForZSet().rangeWithScores("k1", 0, -1);}
}

輸出：

remove:1
rank:1
size:3
[lishi=20.0, zhangsan=10.0, zhaoliu=40.0]

[{"value": "zhangsan","score": 10.0},{"value": "lishi","score": 20.0},{"value": "zhaoliu","score": 40.0}
]