redis by key fuzzy delete, delete batch, batch relevant data

redis-redisTemplate fuzzy matching deleted

A few days ago a vague need to delete redis in key functions, did not think, directly

　　　　　　　　Key = String "noteUserListenedPoi: *"; 
            redisTemplate.delete (Key); 
            logger.info ( "Redis user listening history is empty");

It was found that no, 

Later tests found fuzzy queries can be used to find the following information, change

SET <String> = redisTemplate.keys Keys ( "noteUserListenedPoi:" + "*"); 
            redisTemplate.delete (Keys); 
            logger.info ( "{}, a user listening history Redis emptied"

It can be used

 

Redis fuzzy query

Key values ​​may be acquired in Redis command keys, the specific command format: keys pattern

The article mentions redis are allowed three wildcards fuzzy queries are: *, []?

among them:

*: Wildcard any number of characters

?: Wild single character

[]: Wild one character within the brackets

public Set keys(String pattern){
　　return stringRedisTemplate.keys("*" + pattern + "*");
   // return stringRedisTemplate.keys("?" + pattern);
　　// return stringRedisTemplate.keys("[" + pattern + "]");
}

Batch query

Set<String> keysList = stringRedisTemplate.keys(keys);
List<String> strings = stringRedisTemplate.opsForValue().multiGet(keysList);

 

single

 redisTemplate.opsForValue().set(keys+1,"this is a test content!",1000,TimeUnit.SECONDS);
        String content=redisTemplate.opsForValue().get(keys+1).toString();
        System.out.println("---------》获取到缓存的内容为："+content);
        redisTemplate.delete(redisTemplate.keys(keys+"*"));
        Object msg=redisTemplate.opsForValue().get(keys+1);