redis哈希类型_动力节点Java学院整理

[administrator@localhost redis-3.0.5]$ src/redis-cli
.0.0.1:6379> clear
.0.0.1:6379> hset person name jack
(integer) 1
.0.0.1:6379> hset person age 20
(integer) 1
.0.0.1:6379> hset person sex famale
(integer) 1
.0.0.1:6379> hgetall person
) "name"
) "jack"
) "age"
) "20"
) "sex"
) "famale"
.0.0.1:6379> hkeys person
) "name"
) "age"
) "sex"
.0.0.1:6379> hvals person
) "jack"
) "20"
) "famale"
.0.0.1:6379>

 Map<String,String> person=new HashMap<string,string>();
 person.Add("name","jack");
 ....

typedef struct dictEntry {
 void *key;
 union {
 void *val;
 uint64_t u64;
 int64_t s64;
 double d;
 } v;
 struct dictEntry *next;
} dictEntry;
typedef struct dictType {
 unsigned int (*hashFunction)(const void *key);
 void *(*keyDup)(void *privdata, const void *key);
 void *(*valDup)(void *privdata, const void *obj);
 int (*keyCompare)(void *privdata, const void *key1, const void *key2);
 void (*keyDestructor)(void *privdata, void *key);
 void (*valDestructor)(void *privdata, void *obj);
} dictType;
/* This is our hash table structure. Every dictionary has two of this as we
 * implement incremental rehashing, for the old to the new 0. */
typedef struct dictht {
 dictEntry **table;
 unsigned long size;
 unsigned long sizemask;
 unsigned long used;
} dictht;
typedef struct dict {
 dictType *type;
 void *privdata;
 dictht ht[2];
 long rehashidx; /* rehashing not in progress if rehashidx == -1 */
 int iterators; /* number of iterators currently running */
} dict;
/* If safe is set to 1 this is a safe iterator, that means, you can call
 * dictAdd, dictFind, and other functions against the dictionary even while
 * iterating. Otherwise it is a non safe iterator, and only dictNext()
 * should be called while iterating. */
typedef struct dictIterator {
 dict *d;
 long index;
 int table, safe;
 dictEntry *entry, *nextEntry;
 /* unsafe iterator fingerprint for misuse detection. */
 long long fingerprint;
} dictIterator;

 typedef struct dict {
 dictType *type;
 void *privdata;
 dictht ht[2];
 long rehashidx; /* rehashing not in progress if rehashidx == -1 */
 int iterators; /* number of iterators currently running */
 } dict;

 typedef struct dictType {
 unsigned int (*hashFunction)(const void *key);
 void *(*keyDup)(void *privdata, const void *key);
 void *(*valDup)(void *privdata, const void *obj);
 int (*keyCompare)(void *privdata, const void *key1, const void *key2);
 void (*keyDestructor)(void *privdata, void *key);
 void (*valDestructor)(void *privdata, void *obj);
 } dictType;

 typedef struct dictht {
dictEntry **table;
 unsigned long size;
 unsigned long sizemask;
 unsigned long used;
 } dictht;

 typedef struct dictEntry {
 void *key;
 union {
  void *val;
  uint64_t u64;
 int64_t s64;
  double d;
 } v;
 struct dictEntry *next;
 } dictEntry;