存储格式：Key=>(Map<HK,HV>)
1.put(H key, HK hashKey, HV value)
putAll(H key, java.util.Map<? extends HK,? extends HV> m)
2.get(H key, java.lang.Object hashKey)
multiGet(H key, java.util.Collection<HK> hashKeys) ：返回List<HV>
3.delete(H key, java.lang.Object hashKey)
4.size(H key)
5.keys(H key)
6.values(H key)
7.entries(H key) ：返回Map<HK,HV>
8.hasKey(H key, java.lang.Object hashKey)
9.increment(H key, HK hashKey, long delta)
10.putIfAbsent(H key, HK hashKey, HV value)
