1. pom.xml 添加依赖
org.springframework.data spring-data-redis2.7.1 io.lettuce lettuce-core6.1.8.RELEASE
或者
org.springframework.boot spring-boot-starter-data-redis
引入redis依赖包
redis.clients jedis3.8.0
2. 连接
// 两个连接接口 org.springframework.data.redis.connection.RedisConnection org.springframework.data.redis.connection.RedisConnectionFactory // 连接工厂实现类,有不同的构造方法 org.springframework.data.redis.connection.jedis.JedisConnectionFactory // redis 操作类 // RedisTemplate和StringRedisTemplate 如果序列化方式不一样，则互相取不到对方设置的数据 // 一般 直接使用 StringRedisTemplate org.springframework.data.redis.core.RedisTemplate # 默认JDK序列化 org.springframework.data.redis.core.StringRedisTemplate #String序列化
3. 示例
@Component
public class RedisConfig {
@Bean
public JedisConnectionFactory redisConnectionFactory() {
RedisStandaloneConfiguration config = new RedisStandaloneConfiguration("127.0.0.1", 6379);
return new JedisConnectionFactory(config);
}
@Bean
public RedisTemplate redisTemplate(JedisConnectionFactory configuration){
RedisTemplate redisTemplate = new RedisTemplate();
// redisTemplate.setKeySerializer(new StringRedisSerializer());
// redisTemplate.setValueSerializer(new StringRedisSerializer());
redisTemplate.setKeySerializer(StringRedisSerializer.UTF_8);
redisTemplate.setValueSerializer(StringRedisSerializer.UTF_8);
// redisTemplate.setHashKeySerializer(new GenericJackson2JsonRedisSerializer());
// redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
redisTemplate.setHashKeySerializer(StringRedisSerializer.UTF_8);
redisTemplate.setHashValueSerializer(StringRedisSerializer.UTF_8);
// redisTemplate.afterPropertiesSet();
redisTemplate.setConnectionFactory(configuration);
return redisTemplate;
}
@Bean
public StringRedisTemplate stringRedisTemplate(JedisConnectionFactory configuration){
StringRedisTemplate redisTemplate = new StringRedisTemplate();
redisTemplate.setConnectionFactory(configuration);
return redisTemplate;
}
}
@Service
public class RedisService {
@Autowired
RedisTemplate redisTemplate;
@Autowired
StringRedisTemplate stringRedisTemplate;
public void test(){
redisTemplate.opsForHash().put("redis:test:one","cat1", JSON.toJSONString(new Cat("c1",2)));
stringRedisTemplate.opsForHash().put("redis:test:one","cat2", JSON.toJSONString(new Cat("c1",2)));
}
}
Redis常用API
String
1. 设置有一个特点，可以设置过期时间
2. 可以追加或者截取某个字符串返回
3. 可以原子增加
4. SET if Not eXists
设置值，根据选项返回原值 SET SET key value [ NX | XX] [GET] [ EX seconds | PX milliseconds | EXAT unix-time-seconds | PXAT unix-time-milliseconds | KEEPTTL] The SET command supports a set of options that modify its behavior: NX -- Only set the key if it does not already exist. XX -- Only set the key if it already exist. GET -- Return the old string stored at key, or nil if key did not exist. An error is returned and SET aborted if the value stored at key is not a string. EX seconds -- Set the specified expire time, in seconds. PX milliseconds -- Set the specified expire time, in milliseconds. EXAT timestamp-seconds -- Set the specified Unix time at which the key will expire, in seconds. PXAT timestamp-milliseconds -- Set the specified Unix time at which the key will expire, in milliseconds. KEEPTTL -- Retain the time to live associated with the key. SETEX SETEX key seconds value PSETEX PSETEX key milliseconds value SETNX SETNX key value SETNX is short for "SET if Not eXists" MSET MSET key value [ key value ...] MSETNX MSETNX key value [ key value ...] 给一个已经存在的字符串追加字符串 APPEND APPEND key value 加1 INCR INCR key 加n INCRBY INCRBY key increment INCRBYFLOAT INCRBYFLOAT key increment 减1 DECR DECR key 减n DECRBY DECRBY key decrement GET GET key 查询并删除 GETDEL GETDEL key 查询并设置过期时间 GETEX GETEX key [ EX seconds | PX milliseconds | EXAT unix-time-seconds | PXAT unix-time-milliseconds | PERSIST] The GETEX command supports a set of options that modify its behavior: EX seconds -- Set the specified expire time, in seconds. PX milliseconds -- Set the specified expire time, in milliseconds. EXAT timestamp-seconds -- Set the specified Unix time at which the key will expire, in seconds. PXAT timestamp-milliseconds -- Set the specified Unix time at which the key will expire, in milliseconds. PERSIST -- Remove the time to live associated with the key 返回指定下标下的字符串，类似 subString GETRANGE GETRANGE key start end 获取值并设置新的值 GETSET GETSET key value LCS MGET MGET key [key ...] SETRANGE SETRANGE key offset value 类似于replace STRLEN STRLEN key SUBSTR SUBSTR key start endHash
对于增加，有三类情况：
1. 单个增加k-v 或者 批量增加 k-v
2. 原子性的修改 v
3. putIfAbsent
删除只提供了一个方法
单个删除k 或者批量删除k
查询的几种情况：
1. 查询单个k
2. 批量查询多个 k
3. 一次查询所有的 k-v
4. 查询所有的 k
5. 查询所有的 v
6. 判断某个k是否存在
HSET HSET key field value [ field value ...] Time complexity: O(1) for each field/value pair added, so O(N) to add N field/value pairs when the command is called with multiple field/value pairs. The number of fields that were added HMSET HMSET key field value [ field value ...] Time complexity: O(N) where N is the number of fields being set Simple string reply deprecated HSETNX HSETNX key field value Time complexity: O(1) Sets field in the hash stored at key to value, only if field does not yet exist. If key does not exist, a new key holding a hash is created. If field already exists, this operation has no effect 1 if field is a new field in the hash and value was set. 0 if field already exists in the hash and no operation was performed 类似于putIfAbsent HINCRBY HINCRBY key field increment Time complexity: O(1) the value at field after the increment operation HINCRBYFLOAT HINCRBYFLOAT key field increment Time complexity: O(1) the value of field after the increment HDEL HDEL key field [field ...] Time complexity: O(N) where N is the number of fields to be removed Integer reply: the number of fields that were removed from the hash, not including specified but non existing fields. HGET HGET key field Time complexity: O(1) Bulk string reply: the value associated with field, or nil when field is not present in the hash or key does not exist HMGET HMGET key field [field ...] Time complexity: O(N) where N is the number of fields being requested list of values associated with the given fields, in the same order as they are requested. HGETALL HGETALL key Time complexity: O(N) where N is the size of the hash list of fields and their values stored in the hash, or an empty list when key does not exist HKEYS HKEYS key Time complexity: O(N) where N is the size of the hash. list of fields in the hash, or an empty list when key does not exist HVALS HVALS key Time complexity: O(N) where N is the size of the hash. list of values in the hash, or an empty list when key does not exist HLEN HLEN key Time complexity: O(1) number of fields in the hash, or 0 when key does not exist HRANDFIELD HRANDFIELD key [ count [WITHVALUES]] Available since: 6.2.0 Time complexity: O(N) where N is the number of fields returned HSCAN SCAN cursor [MATCH pattern] [COUNT count] [TYPE type] HSTRLEN HSTRLEN key field Time complexity: O(1) the string length of the value associated with field, or zero when field is not present in the hash or key does not exist at all HEXISTS HEXISTS key field Time complexity: O(1) 1 if the hash contains field. 0 if the hash does not contain field, or key does not exist
List
1. 从队首操作
2. 从队尾操作
3. 入队、出队、队列之间元素转移
4. 阻塞操作
5. 下标操作
加入元素： 插入元素，后面的元素放在前面 LPUSH LPUSH key element [element ...] Elements are inserted one after the other to the head of the list RPUSH RPUSH key element [element ...] Elements are inserted one after the other to the tail of the list, from the leftmost element to the rightmost element 只有当key存在才添加元素 LPUSHX LPUSHX key element [element ...] only if key already exists 只有当key存在才添加元素 RPUSHX RPUSHX key element [element ...] 在pivot 之前或者之后插入 element LINSERT LINSERT key BEFORE | AFTER pivot element 在 index位置添加元素 LSET LSET key index element 弹出元素： 弹出第一个元素 LPOP LPOP key [count] 弹出最后的元素 RPOP RPOP key [count] LMPOP LMPOP numkeys key [key ...] LEFT | RIGHT [COUNT count] LPOS LPOS key element [RANK rank] [COUNT num-matches] [MAXLEN len] LPOS key element 返回第一个元素的下标 LPOS key element [RANK rank] 返回第 rank 个元素的下标， 如果rank 是负数，则从尾部开始查找 COUNT 返回的个数 移除指定个数的元素 LREM LREM key count element count > 0: Remove elements equal to element moving from head to tail. count < 0: Remove elements equal to element moving from tail to head. count = 0: Remove all elements equal to element. LTRIM LTRIM key start stop 队列之间的操作 原子操作 将source的left|right 元素 移动到 destination的 left|right LMOVE LMOVE source destination LEFT | RIGHT LEFT | RIGHT 弹出source最后的元素 加入到 destination 第一个位置 RPOPLPUSH RPOPLPUSH source destination 返回index位置的元素 LINDEX LINDEX key index 返回元素个数 LLEN LLEN key 返回指定下标范围的元素 LRANGE LRANGE key start stop 阻塞操作 BLMOVE BLMPOP BLPOP BRPOP BRPOPLPUSHSet
1. 元素的基本操作
2. 集合之间的操作
添加元素，若元素已存在，则忽略 SADD SADD key member [member ...] 判断元素是否存在集合中 SISMEMBER SISMEMBER key member 批量判断元素是否存在集合中 SMISMEMBER SMISMEMBER key member [member ...] 返回指定数量的元素 SRANDMEMBER SRANDMEMBER key [count] 1. SRANDMEMBER key 随机返回key的一个元素 2. SRANDMEMBER key count ，count是正数，返回的数量为count 或者 小于count 3. SRANDMEMBER key count ，count是负数，返回的数量 一定是 count，如果不够count，则同一个元素会多次反回 返回集合所有元素 SMEMBERS SMEMBERS key 移除指定的元素 SREM SREM key member [member ...] 随机移除 key 的若干个元素 SPOP SPOP key [count] 返回元素个数 SCARD SCARD key 将元素从 source 移动到 destination SMOVE SMOVE source destination member 返回第一个key 和其他key 不同的元素 SDIFF SDIFF key [key ...] 返回第一个key 和其他key 不同的元素，并存储到destination SDIFFSTORE SDIFFSTORE destination key [key ...] 将 多个集合 并集 SUNIOn SUNIOn key [key ...] 将 多个集合 并集，并存储在destination SUNIOnSTORE SUNIOnSTORE destination key [key ...] 返回所有key之间的交集 SINTER SINTER key [key ...] 返回所有key之间的交集,并存储到destination SINTERSTORE SINTERSTORE destination key [key ...] SINTERCARD SINTERCARD numkeys key [key ...] [LIMIT limit] SSCANZset
