Preface:
Redis on the basis of finishing, five commonly used type of data structure, String, List, Set, Hash, ZSet, below their corresponding profiles, command and application case, the following key, value refers to are the key parameters for the when referring to values can pass multiple values
maven introduced
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0-yp</version>
</dependency>
Write a test case:
Jedis jedis = new Jedis("192.168.1.214",6379);
String ping = jedis.ping();
System.out.println(ping);
This result => PONG
described can be successfully connected
1.redis strings
command:
| command | Features | Java code corresponding to | Return Type | return value |
|---|---|---|---|---|
| set | Insert key and value | jedis.set(key,value) | String | “OK” |
| get | According to acquire key value | jedis.get(key) | String | value |
| of the | According delete key | jedis.del(key) | Long |
Case:
redis 127.0.0.1:6379> set hello world
OK
redis 127.0.0.1:6379> get hello
"world"
redis 127.0.0.1:6379> del hello
(integer) 1
redis 127.0.0.1:6379> get hello
(nil)
redis 127.0.0.1:6379>
The list 2.redis
command:
| command | Features | Java code corresponding to | Return Type | return value |
|---|---|---|---|---|
| LPUSH | Customization will push the left end of the list | jedis.lpush(key,values) | Long | |
| RPUSH | Customization will push the right end of the list | jedis.rpush(key,values) | Long | |
| LPOP | Pop a value from the left of the list, and returns the value of the popup | jedis.lpop(key) | String | value |
| RPOP | Pop a value from the right of the list, and returns the value of the popup | jedis.rpop(key) | String | value |
| lrange | Get a list of all values in a given range | jedis.lrange(key, ,start,end); | List<String> | values |
| LINDEX | Get a list of individual elements in a given position on the | jedis.lindex(key,index) | String | value |
Case:
127.0.0.1:6379> rpush list-key item
(integer) 1
127.0.0.1:6379> rpush list-key item2
(integer) 2
127.0.0.1:6379> rpush list-key item
(integer) 3
127.0.0.1:6379> lrange list-key 0 -1
1) "item"
2) "item2"
3) "item"
127.0.0.1:6379> lindex list-key 1
"item2"
127.0.0.1:6379> lpop list-key
"item"
127.0.0.1:6379> lrange list-key 0 -1
1) "item2"
2) "item"
127.0.0.1:6379>
Note:
0 is the starting index
ending index position -1
3.Redis collection
Summary:
from one end of the set can not push or pop
can with SADD add elements into the collection
SREM remove elements
SISMEMBER check element exists
SMEMBERS Gets a collection that contains all the elements a lot will be very slow
command:
| command | Features | Java code corresponding to | Return Type | return value |
|---|---|---|---|---|
| SADD | The elements added to the collection | jedis.sadd(key,values) | Long | |
| SREM | Remove elements | jedis.srem(key,values) | Long | |
| SISMEMBER | Command to determine whether a member is a member of the set of elements | jedis.sismember(key,value) | Boolean | |
| SMEMBERS | Gets a collection that contains all the elements a lot will be very slow | jedis.smembers(key) | Set<String> | values |
Case:
127.0.0.1:6379> sadd set-key item
(integer) 1
127.0.0.1:6379> sadd set-key item2
(integer) 1
127.0.0.1:6379> sadd set-key item3
(integer) 1
127.0.0.1:6379> sadd set-key item
(integer) 0
127.0.0.1:6379> smembers set-key
1) "item2"
2) "item3"
3) "item"
127.0.0.1:6379> sismember set-key item
(integer) 1
127.0.0.1:6379> sismember set-key item4
(integer) 0
127.0.0.1:6379> srem set-key item2
(integer) 1
127.0.0.1:6379> srem set-key item2
(integer) 0
127.0.0.1:6379> smembers set-key
1) "item3"
2) "item"
127.0.0.1:6379>
4.Redis hash hash
Introduction:
hash may store a mapping between the plurality of key-value pairs, as string, string or numeric values may be stored value
and the user may perform its digital value increment decrement operation
command:
| command | Features | Java code corresponding to | Return Type | return value |
|---|---|---|---|---|
| HSET | Since the hash associated with the given key-value pairs inside | jedis.hset(key,field,value) | Long | |
| hget | Gets Top hash value 18 lines | jedis.hget(key,field) | String | |
| HGETALL | Get all values | jedis.hgetAll(key) | Map<String, String> | {field:value} |
| HDEL | Deletes the specified value | jedis.hdel(key,field) | Long |
Case:
127.0.0.1:6379> hset hash-key sub-key1 value1
(integer) 1
127.0.0.1:6379> hset hash-key sub-key1 value2
(integer) 0
127.0.0.1:6379> hset hash-key sub-key1 value1
(integer) 0
127.0.0.1:6379> hset hash-key sub-key2 value1
(integer) 1
127.0.0.1:6379> hgetall hash-key
1) "sub-key1"
2) "value1"
3) "sub-key2"
4) "value1"
127.0.0.1:6379> hdel hash-key sub-key2
(integer) 1
127.0.0.1:6379> hdel hash-key sub-key2
(integer) 0
127.0.0.1:6379> hget hash-key sub-key1
"value1"
127.0.0.1:6379> hgetall hash-key
1) "sub-key1"
2) "value1"
127.0.0.1:6379>
Ordered set of 5.Redis
Description:
ordered set and hash, as are used to store key-value pairs, ordered set can be sorted according to the incoming score (score)
command:
| command | Features | Java code corresponding to | Return Type | return value |
|---|---|---|---|---|
| ZADD | A member of the set with a score added to the ordered collection | jedis.zadd(key,score,member) | Long | |
| ZRANGE | The index order, and displays the value within the index range | jedis.zrange(key,start,end) | Set<String> | |
| ZRANGEBYSCORE | The fraction sorted and displayed value within the range of scores | jedis.zrangeByScore(key,min,max) | Set<String> | |
| ZREM | If the member exists, you can remove the member | jedis.zre(key,values) | Long | |
| ZINTERSTORE | Intersection operator generates a new ordered set based on two ordered set, adding Score | jedis.zinterstore(newkey,key1,keys) | Long | |
| ZINTERSTORE | The two ordered set union operation that generates a new ordered set, adding Score | jedis.zunionstore(newkey,key1,keys) | Long |
Case:
127.0.0.1:6379> zadd zset-key 728 member1
(integer) 1
127.0.0.1:6379> zadd zset-key 982 member0
(integer) 1
127.0.0.1:6379> zadd zset-key 982 member0
(integer) 0
127.0.0.1:6379> zrange zset-key 0 -1 withscores
1) "member1"
2) "728"
3) "member0"
4) "982"
127.0.0.1:6379> zrangebyscore zset-key 0 800 withscores
1) "member1"
2) "728"
127.0.0.1:6379> zrem zset-key member1
(integer) 1
127.0.0.1:6379> zrem zset-key member1
(integer) 0
127.0.0.1:6379> zrange zset-key 0 -1 withscores
1) "member0"
2) "982"
127.0.0.1:6379> zrange zset-key 0 -1
1) "member0"
127.0.0.1:6379>
Note
on java withscores, with a separate method jedis.zrangeWithScores / zrangeByScoreWithScores, the return value Set <Tuple>
