Hasehes
Redis hash是一个string类型的field和value映射表。hash特别适合于存储对象。相对存成string，现在存为一个hash类型中可以占用更少的内存。且可以更方便的存储整个对象。
hset
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redis 127.0.0.1:6379> hset user:001 name michael
(integer) 1
redis 127.0.0.1:6379> hget user:001 name
"michael"
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hsetnx
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redis 127.0.0.1:6379> hsetnx user:003 name jason
(integer) 1
redis 127.0.0.1:6379> hsetnx user:003 name tom
(integer) 0 --
set
failed
redis 127.0.0.1:6379> hget user:003 name
"jason"
-- value is not changed.
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hmset/hmget
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redis 127.0.0.1:6379> hmset user:004 name michael age 29 sex 1
OK
redis 127.0.0.1:6379> hget user:004 name
"michael"
redis 127.0.0.1:6379> hget user:004 age
"29"
redis 127.0.0.1:6379> hget user:004 sex
"1"
redis 127.0.0.1:6379> hmget user:004 name age sex
1)
"michael"
2)
"29"
3)
"1"
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hincrby
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redis 127.0.0.1:6379> hincrby user:004 age 5
(integer) 34
redis 127.0.0.1:6379> hget user:004 age
"34"
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hexists
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redis 127.0.0.1:6379> hexists user:004 age
(integer) 1
redis 127.0.0.1:6379> hexists user:004 address
(integer) 0
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hlen
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redis 127.0.0.1:6379> hlen user:004
(integer) 3
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hdel
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redis 127.0.0.1:6379> hdel user:004 age
(integer) 1
redis 127.0.0.1:6379> hexists user:004 address
(integer) 0
redis 127.0.0.1:6379> hget user:004 age
(nil)
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hkeys hvals hgetall
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redis 127.0.0.1:6379> hkeys user:004
1)
"name"
2)
"sex"
redis 127.0.0.1:6379> hvals user:004
1)
"michael"
2)
"1"
redis 127.0.0.1:6379> hgetall user:004
1)
"name"
2)
"michael"
3)
"sex"
4)
"1"
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本文转自 yuanzhitang 51CTO博客，原文链接：http://blog.51cto.com/yuanzhitang/1783356，如需转载请自行联系原作者
