解决Java Redis删除HashMap中的key踩到的坑

//通过key取出对应的HashMap
Map<String, String> ruleMap = jedisCluster.hgetAll("HashKey");
//通过java中移除HashMap中的Key
ruleMap.remove("ruleA");
//将移除后的HashMap重新存入redis的hashmap中
jedisCluster.hmset(key, ruleMap);
//问题来了,这里通过HashKey从redis中取出HashMap时发现ruleA的key的内容还在存在
Map<String, String> newRuleMap = jedisCluster.hgetAll("HashKey");
System.out.println(newRuleMap);

//通过redis中针对hashmap移除指定key函数进行处理
jedisCluster.hdel("HashKey", "ruleA");

//实际上在发往redis执行命令前,会将HashMap中的转成字节数据集合
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'))   #表示删除以test开头的hash大字典。
r.delete(key1,key2)#表示删除key1字典和key2字典

r.delete(dict_name)

r.hdel(dict_name,key1)