redis 安装与使用

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安装：

1. 下载的windows版本是redis-2.0.2，解压到D盘下：D:\redis-2.0.2

2. 启动Redis服务（conf文件指定配置文件，若不指定则默认）：D:\redis-2.0.2>redis-server.exe redis.conf

启动cmd窗口要一直开着，关闭后则Redis服务关闭。

redis-server.exe：服务程序

redis-check-dump.exe：本地数据库检查

redis-check-aof.exe：更新日志检查

redis-benchmark.exe：性能测试，用以模拟同时由N个客户端发送M个 SETs/GETs查询 (类似于 Apache的ab工具).

3. 这时服务开启着，另外开一个窗口进行，设置客户端：D:\redis-2.0.2>redis-cli.exe -h 202.117.16.133 -p 6379

使用：

在线使用文档：http://redis.readthedocs.org/en/2.4/

一．使用java操作redis：

1. 下载jedis-2.0.0.jar.该包为java的客户端。

2. 测试代码

packagecom.mangocity.test;

importjava.util.HashMap;

importjava.util.List;

importjava.util.Map;

importredis.clients.jedis.Jedis;

publicclass TestRedis {

/**

* @param args

public static void main(String[] args){

//连接redis服务

Jedis jedis = newJedis("127.0.0.1",6379);

//密码验证-如果你没有设置redis密码可不验证即可使用相关命令

//jedis.auth("abcdefg");

//简单的key-value存储

jedis.set("redis","myredis");

System.out.println(jedis.get("redis"));

//删除一个key

//在原有值得基础上添加,如若之前没有该key，则导入该key

//之前已经设定了redis对应"myredis",此句执行便会使redis对应"myredisyourredis"

jedis.append("redis","yourredis");

jedis.append("content","rabbit");

jedis.del("redis");

//mset 是设置多个key-value值参数（key1,value1,key2,value2,...,keyn,valuen）

//mget 是获取多个key所对应的value值参数（key1,key2,key3,...,keyn）返回的是个list

jedis.mset("name1","yangw","name2","demon","name3","elena");

System.out.println(jedis.mget("name1","name2","name3"));

//map

Map<String,String> user = newHashMap<String,String>();

user.put("name","cd");

user.put("password","123456");

//map存入redis

jedis.hmset("user",user);

//mapkey个数

System.out.println(String.format("len:%d",jedis.hlen("user")));

//map中的所有键值

System.out.println(String.format("keys:%s", jedis.hkeys("user") ));

//map中的所有value

System.out.println(String.format("values: %s",jedis.hvals("user") ));

//取出map中的name字段值

List<String> rsmap =jedis.hmget("user", "name","password");

System.out.println(rsmap);

//删除map中的某一个键值password

jedis.hdel("user","password");

System.out.println(jedis.hmget("user", "name","password"));

//list

jedis.del("listDemo");

System.out.println(jedis.lrange("listDemo", 0, -1));

jedis.lpush("listDemo","A");

jedis.lpush("listDemo","B");

jedis.lpush("listDemo","C");

System.out.println(jedis.lrange("listDemo", 0, -1));

System.out.println(jedis.lrange("listDemo", 0, 1));

//set

jedis.sadd("sname","wobby");

jedis.sadd("sname","kings");

jedis.sadd("sname","demon");

System.out.println(String.format("set num: %d",jedis.scard("sname")));

System.out.println(String.format("all members: %s",jedis.smembers("sname")));

System.out.println(String.format("is member: %B",jedis.sismember("sname", "wobby")));

System.out.println(String.format("randmember: %s", jedis.srandmember("sname")));

//删除一个对象

jedis.srem("sname","demon");

System.out.println(String.format("all members: %s",jedis.smembers("sname")));

}

二．使用原始命令操作redis

1 hset命令

对hash中的字段赋值，如果不存在则创建否则覆盖

返回值:被创建返回1，被更新返回0

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hset debughash field1 "hello"

02.(integer) 1

03.redis 127.0.0.1:6379> hget debughash field1

04."hello"

05.redis 127.0.0.1:6379> hset debughash field1 "world"

06.(integer) 0

07.redis 127.0.0.1:6379> hget debughash field1

08."world"

09.redis 127.0.0.1:6379>

2 hget命令

获取field对于的value

返回值:存在返回value值，否则返回 nil

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hset debughash field2 "hello"

02.(integer) 1

03.redis 127.0.0.1:6379> hget debughash field2

04."hello"

05.redis 127.0.0.1:6379> hget debughash field3

06.(nil)

3 hexists

判断field是否存在

返回值:存在返回1，否则返回0

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hexists debughash field2

02.(integer) 1

03.redis 127.0.0.1:6379> hexists debughash field3

04.(integer) 0

4 hdel

删除field

返回值:返回删除的数量

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hdel debughash field2

02.(integer) 1

03.redis 127.0.0.1:6379> hdel debughash field3

04.(integer) 0

05.redis 127.0.0.1:6379> hget debughash field3

06.(nil)

5 hkeys

返回hash下包含的field

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hkeys debughash

02.1) "field1"

03.redis 127.0.0.1:6379> hset debughash field2 "word"

04.(integer) 1

05.redis 127.0.0.1:6379> HKEYS debughash

06.1) "field1"

07.2) "field2"

08.redis 127.0.0.1:6379> HKEYS debughash field2

09.(error) ERR wrong number of arguments for 'hkeys' command

10.redis 127.0.0.1:6379> HKEYS debughash

11.1) "field1"

12.2) "field2"

13.redis 127.0.0.1:6379>

6 hlen

返回hash下含有field的数量

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hlen debughash

02.(integer) 2

7 hmset

设置多个field值，存在覆盖，否则创建

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hmset testhash field1 "hello" field2"world"

02.OK

03.redis 127.0.0.1:6379> hget testhash field1

04."hello"

05.redis 127.0.0.1:6379> hget testhash field2

06."world"

8 hmget

获取多个field的值

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hmget testhash field1 field2 field3

02.1) "hello"

03.2) "world"

04.3) (nil)

9 hgetall

获取hash下所有field与value

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hgetall testhash

02.1) "field1"

03.2) "hello"

04.3) "field2"

05.4) "world"

10 hvals

获取value值

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hvals testhash

02.1) "hello"

03.2) "world"

11 hsetnx

只有field不存在的时候，设置value

返回值：如果创建成功返回1，若存在返回0

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hgetall testhash

02.1) "field1"

03.2) "hello"

04.3) "field2"

05.4) "world"

06.redis 127.0.0.1:6379> hsetnx testhash field3 "00000"

07.(integer) 1

08.redis 127.0.0.1:6379> hgetall testhash

09.1) "field1"

10.2) "hello"

11.3) "field2"

12.4) "world"

13.5) "field3"

14.6) "00000"

15.redis 127.0.0.1:6379>

12 hincrby

按整数自增，如果不存在则field赋值为value，如果不是数值型的字符串，返回error

返回值:返回自增后的值

例子:

[php] view plaincopy

01.redis 127.0.0.1:6379> hgetall testhash

02.1) "field1"

03.2) "hello"

04.3) "field2"

05.4) "world"

06.5) "field3"

07.6) "00000"

08.redis 127.0.0.1:6379> hincrby testhash field4 5

09.(integer) 5

10.redis 127.0.0.1:6379> hicrby testhash field4 5

11.(error) ERR unknown command 'hicrby'

12.redis 127.0.0.1:6379> hincrby testhash field4 5

13.(integer) 10

14.redis 127.0.0.1:6379> hincrby testhash field4 -11

15.(integer) -1

16.redis 127.0.0.1:6379> hset testhash field5 "yy"

17.(integer) 1

18.redis 127.0.0.1:6379> hincrby testhash field5 -11

19.(error) ERR hash value is not an integer

20.redis 127.0.0.1:6379>

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