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redis缓存工具类，值得拥有~
2022-07-07 21:52:00 【小曲同学呀】
还在为redis的缓存的工具类而发愁吗，这里精心为你总结了redis缓存的各种工具类，非常全面，快来看看吧~
@Component
public class RedisUtil {
@Autowired
private RedisTemplate redisTemplate;
/** * 指定缓存失效时间 * * @param key 键 * @param time 时间(秒) * @return */
public boolean expire(String key, long time) {
try {
if (time > 0) {
redisTemplate.expire(key, time, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 根据key 获取过期时间 * * @param key 键 不能为null * @return 时间(秒) 返回0代表为永久有效 */
public long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
/** * 判断key是否存在 * * @param key 键 * @return true 存在 false不存在 */
public boolean hasKey(String key) {
try {
return redisTemplate.hasKey(key);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 删除缓存 * * @param key 可以传一个值 或多个 */
@SuppressWarnings("unchecked")
public void del(String... key) {
if (key != null && key.length > 0) {
if (key.length == 1) {
redisTemplate.delete(key[0]);
} else {
redisTemplate.delete(CollectionUtils.arrayToList(key));
}
}
}
//============================String=============================
/** * 普通缓存获取 * * @param key 键 * @return 值 */
public Object get(String key) {
return key == null ? null : redisTemplate.opsForValue().get(key);
}
/** * 普通缓存放入 * * @param key 键 * @param value 值 * @return true成功 false失败 */
public boolean set(String key, Object value) {
try {
redisTemplate.opsForValue().set(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 普通缓存放入并设置时间 * * @param key 键 * @param value 值 * @param time 时间(秒) time要大于0 如果time小于等于0 将设置无限期 * @return true成功 false 失败 */
public boolean set(String key, Object value, long time) {
try {
if (time > 0) {
redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
} else {
set(key, value);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 递增 * * @param key 键 * @param delta 要增加几(大于0) * @return */
public long incr(String key, long delta) {
if (delta < 0) {
throw new RuntimeException("递增因子必须大于0");
}
return redisTemplate.opsForValue().increment(key, delta);
}
/** * 递减 * * @param key 键 * @param delta 要减少几(小于0) * @return */
public long decr(String key, long delta) {
if (delta < 0) {
throw new RuntimeException("递减因子必须大于0");
}
return redisTemplate.opsForValue().increment(key, -delta);
}
//================================Map=================================
/** * HashGet * * @param key 键 不能为null * @param item 项 不能为null * @return 值 */
public Object hget(String key, String item) {
return redisTemplate.opsForHash().get(key, item);
}
/** * 获取hashKey对应的所有键值 * * @param key 键 * @return 对应的多个键值 */
public Map<Object, Object> hmget(String key) {
return redisTemplate.opsForHash().entries(key);
}
/** * HashSet * * @param key 键 * @param map 对应多个键值 * @return true 成功 false 失败 */
public boolean hmset(String key, Map<String, Object> map) {
try {
redisTemplate.opsForHash().putAll(key, map);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * HashSet 并设置时间 * * @param key 键 * @param map 对应多个键值 * @param time 时间(秒) * @return true成功 false失败 */
public boolean hmset(String key, Map<String, Object> map, long time) {
try {
redisTemplate.opsForHash().putAll(key, map);
if (time > 0) {
expire(key, time);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 向一张hash表中放入数据,如果不存在将创建 * * @param key 键 * @param item 项 * @param value 值 * @return true 成功 false失败 */
public boolean hset(String key, String item, Object value) {
try {
redisTemplate.opsForHash().put(key, item, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 向一张hash表中放入数据,如果不存在将创建 * * @param key 键 * @param item 项 * @param value 值 * @param time 时间(秒) 注意:如果已存在的hash表有时间,这里将会替换原有的时间 * @return true 成功 false失败 */
public boolean hset(String key, String item, Object value, long time) {
try {
redisTemplate.opsForHash().put(key, item, value);
if (time > 0) {
expire(key, time);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 删除hash表中的值 * * @param key 键 不能为null * @param item 项 可以使多个 不能为null */
public void hdel(String key, Object... item) {
redisTemplate.opsForHash().delete(key, item);
}
/** * 判断hash表中是否有该项的值 * * @param key 键 不能为null * @param item 项 不能为null * @return true 存在 false不存在 */
public boolean hHasKey(String key, String item) {
return redisTemplate.opsForHash().hasKey(key, item);
}
/** * hash递增 如果不存在,就会创建一个 并把新增后的值返回 * * @param key 键 * @param item 项 * @param by 要增加几(大于0) * @return */
public double hincr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, by);
}
/** * hash递减 * * @param key 键 * @param item 项 * @param by 要减少记(小于0) * @return */
public double hdecr(String key, String item, double by) {
return redisTemplate.opsForHash().increment(key, item, -by);
}
//============================set=============================
/** * 根据key获取Set中的所有值 * * @param key 键 * @return */
public Set<Object> sGet(String key) {
try {
return redisTemplate.opsForSet().members(key);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/** * 根据value从一个set中查询,是否存在 * * @param key 键 * @param value 值 * @return true 存在 false不存在 */
public boolean sHasKey(String key, Object value) {
try {
return redisTemplate.opsForSet().isMember(key, value);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 将数据放入set缓存 * * @param key 键 * @param values 值 可以是多个 * @return 成功个数 */
public long sSet(String key, Object... values) {
try {
return redisTemplate.opsForSet().add(key, values);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/** * 将set数据放入缓存 * * @param key 键 * @param time 时间(秒) * @param values 值 可以是多个 * @return 成功个数 */
public long sSetAndTime(String key, long time, Object... values) {
try {
Long count = redisTemplate.opsForSet().add(key, values);
if (time > 0) expire(key, time);
return count;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/** * 获取set缓存的长度 * * @param key 键 * @return */
public long sGetSetSize(String key) {
try {
return redisTemplate.opsForSet().size(key);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/** * 移除值为value的 * * @param key 键 * @param values 值 可以是多个 * @return 移除的个数 */
public long setRemove(String key, Object... values) {
try {
Long count = redisTemplate.opsForSet().remove(key, values);
return count;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
//===============================list=================================
/** * 获取list缓存的内容 * * @param key 键 * @param start 开始 * @param end 结束 0 到 -1代表所有值 * @return */
public List<Object> lGet(String key, long start, long end) {
try {
return redisTemplate.opsForList().range(key, start, end);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/** * 获取list缓存的长度 * * @param key 键 * @return */
public long lGetListSize(String key) {
try {
return redisTemplate.opsForList().size(key);
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/** * 通过索引 获取list中的值 * * @param key 键 * @param index 索引 index>=0时， 0 表头，1 第二个元素，依次类推；index<0时，-1，表尾，-2倒数第二个元素，依次类推 * @return */
public Object lGetIndex(String key, long index) {
try {
return redisTemplate.opsForList().index(key, index);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/** * 将list放入缓存 * * @param key 键 * @param value 值 * @return */
public boolean lSet(String key, Object value) {
try {
redisTemplate.opsForList().rightPush(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 将list放入缓存 * * @param key 键 * @param value 值 * @param time 时间(秒) * @return */
public boolean lSet(String key, Object value, long time) {
try {
redisTemplate.opsForList().rightPush(key, value);
if (time > 0) expire(key, time);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 将list放入缓存 * * @param key 键 * @param value 值 * @return */
public boolean lSet(String key, List<Object> value) {
try {
redisTemplate.opsForList().rightPushAll(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 将list放入缓存 * * @param key 键 * @param value 值 * @param time 时间(秒) * @return */
public boolean lSet(String key, List<Object> value, long time) {
try {
redisTemplate.opsForList().rightPushAll(key, value);
if (time > 0) expire(key, time);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 根据索引修改list中的某条数据 * * @param key 键 * @param index 索引 * @param value 值 * @return */
public boolean lUpdateIndex(String key, long index, Object value) {
try {
redisTemplate.opsForList().set(key, index, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 移除N个值为value * * @param key 键 * @param count 移除多少个 * @param value 值 * @return 移除的个数 */
public long lRemove(String key, long count, Object value) {
try {
Long remove = redisTemplate.opsForList().remove(key, count, value);
return remove;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
//================有序集合 sort set===================
/** * 有序set添加元素 * * @param key * @param value * @param score * @return */
public boolean zSet(String key, Object value, double score) {
return redisTemplate.opsForZSet().add(key, value, score);
}
public long batchZSet(String key, Set<ZSetOperations.TypedTuple> typles) {
return redisTemplate.opsForZSet().add(key, typles);
}
public void zIncrementScore(String key, Object value, long delta) {
redisTemplate.opsForZSet().incrementScore(key, value, delta);
}
public void zUnionAndStore(String key, Collection otherKeys, String destKey) {
redisTemplate.opsForZSet().unionAndStore(key, otherKeys, destKey);
}
/** * 获取zset数量 * @param key * @param value * @return */
public long getZsetScore(String key, Object value) {
Double score = redisTemplate.opsForZSet().score(key, value);
if(score==null){
return 0;
}else{
return score.longValue();
}
}
/** * 获取有序集 key 中成员 member 的排名 。 * 其中有序集成员按 score 值递减 (从大到小) 排序。 * @param key * @param start * @param end * @return */
public Set<ZSetOperations.TypedTuple> getZSetRank(String key, long start, long end) {
return redisTemplate.opsForZSet().reverseRangeWithScores(key, start, end);
}
}
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