//通過(guò)key取出對(duì)應(yīng)的HashMap
Map<String, String> ruleMap = jedisCluster.hgetAll("HashKey");
//通過(guò)java中移除HashMap中的Key
ruleMap.remove("ruleA");
//將移除后的HashMap重新存入redis的hashmap中
jedisCluster.hmset(key, ruleMap);
//問(wèn)題來(lái)了,這里通過(guò)HashKey從redis中取出HashMap時(shí)發(fā)現(xiàn)ruleA的key的內(nèi)容還在存在
Map<String, String> newRuleMap = jedisCluster.hgetAll("HashKey");
System.out.println(newRuleMap);

//通過(guò)redis中針對(duì)hashmap移除指定key函數(shù)進(jìn)行處理
jedisCluster.hdel("HashKey", "ruleA");

//實(shí)際上在發(fā)往redis執(zhí)行命令前,會(huì)將HashMap中的轉(zhuǎn)成字節(jié)數(shù)據(jù)集合
public void hmset(byte[] key, Map<byte[], byte[]> hash) {
  List<byte[]> params = new ArrayList();
  params.add(key);
  Iterator i$ = hash.entrySet().iterator();
  while(i$.hasNext()) {
    Entry<byte[], byte[]> entry = (Entry)i$.next();
    params.add(entry.getKey());
    params.add(entry.getValue());
  }
  this.sendCommand(Command.HMSET, (byte[][])params.toArray(new byte[params.size()][]));
}

redis 127.0.0.1:6379> HSET HashKey "ruleA" "valA" "ruleB" "valB"

pool = redis.ConnectionPool(host='127.0.0.1',port=6381,db=0,decode_responses=True)
r = redis.Redis(connection_pool=pool)
pool = redis.ConnectionPool(host='127.0.0.1',port=6381,decode_responses=True)
r = redis.Redis(connection_pool=pool)
r = redis.Redis(host='127.0.0.1',port=6381,db=0,decode_responses=True)

r.fushall()

r.delete(*r.keys('^test'))   #表示刪除以test開(kāi)頭的hash大字典。
r.delete(key1,key2)#表示刪除key1字典和key2字典

r.delete(dict_name)

r.hdel(dict_name,key1)