Redis的简单使用和介绍

1、什么是NoSQL NoSQL = Not Only SQL 非关系型的数据库 2、为什么需要NoSQL High performance 高并发读写 Huge Storage 海量数据的高效率存储和访问 High Scalability && High Availability 高可扩展性和高可用性 3、NoSQL数据库的四大分类键值(Key-Value)存储列存储文档数据库图形数据库 Redis的简单使用和介绍

4、NoSQL的特点易扩展灵活的数据模型大数据量，高性能高可用 5、Redis高性能键值对数据库，支持的键值数据类型字符串类型列表类型有序集和类型散列类型集合类型 6、Redis的应用场景缓存任务队列网站访问统计应用排行榜数据过期处理分布式集群架构中的session分离 7、redis基本操作进入redis：redis-cli 存储：set name value 取值： get name 查看所有的键：keys * 删除键值对：del name 8、Jedis入门 Jedis是Redis官方首选的Java客户端开发包 http://github.com/xetorthio/jedis 9、java使用Jedis Redis的简单使用和介绍

 1 package com.jedis.test;
 2 
 3 import redis.clients.jedis.Jedis;
 4 
 5 /**
 6  * Created by Administrator on 2017-07-13.
 7  */
 8 public class JedisDemo1 {
 9     /**
10      * 单实例测试
11      */
12     public static void main(String[] args) {
13         //设置IP地址和端口
14         Jedis jedis=new Jedis("192.168.21.195",6379);
15         //保存数据
16         jedis.set("name","lu");
17         //获取数据
18         String value=jedis.get("name");
19         System.out.println("name对应的："+value);
20         //释放资源
21         jedis.close();
22     }
23 }

jedis单实例测试 Redis的简单使用和介绍

 1 package com.jedis.test;
 2 
 3 
 4 import redis.clients.jedis.Jedis;
 5 import redis.clients.jedis.JedisPool;
 6 import redis.clients.jedis.JedisPoolConfig;
 7 
 8 import java.util.Date;
 9 
10 /**
11  *连接池的方式连接
12  */
13 public class JedisDemo2 {
14     public static void main(String[] args) {
15         //获取连接池的配置
16         JedisPoolConfig config = new JedisPoolConfig();
17         //设置最大连接数
18         config.setMaxTotal(30);
19         //设置最大空闲连接数
20         config.setMaxIdle(10);
21         //获得连接池
22         JedisPool jedisPool=new JedisPool(config,"192.168.21.195",6379);
23         //获得核心对象
24         Jedis jedis=null;
25         try {
26             //通过连接池获得连接
27             jedis=jedisPool.getResource();
28             //设置数据
29             jedis.set("name","张三");
30             //获取数据
31             String value = jedis.get("name");
32             System.out.println("name对应的value:"+value);
33         }catch (Exception e){
34             e.printStackTrace();
35         }finally {
36             if (jedis!=null){
37                 jedis.close();
38             }
39             if (jedisPool!=null){
40                 jedisPool.close();
41             }
42         }
43     }
44 
45 }

jedis连接池方式连接

10、Redis5种数据类型字符串(String) 字符串列表(list) 有序字符串集合(sorted set) 哈希(hash) 字符串集合(set) 11、key定义的注意点; 不要过长不要过短统一的命名规范 12、存储String 二进制安全的，存入和获取的数据相同 Value最多可以容纳的数据长度是512M 13、存储String常用命令赋值取值删除扩展命令取值增减 Redis的简单使用和介绍

redis 127.0.0.1:6379> set company lu
OK
redis 127.0.0.1:6379> get company
"lu"
redis 127.0.0.1:6379> getset company baidu
"lu"
redis 127.0.0.1:6379> get company
"baidu"
redis 127.0.0.1:6379> del company
(integer) 1
redis 127.0.0.1:6379> get company
(nil)
redis 127.0.0.1:6379> incr num
(integer) 1
redis 127.0.0.1:6379> get num
"1"
redis 127.0.0.1:6379> incr num
(integer) 2
redis 127.0.0.1:6379> get num
"2"
redis 127.0.0.1:6379> incr name
(error) ERR value is not an integer or out of range
redis 127.0.0.1:6379> decr num
(integer) 1
redis 127.0.0.1:6379> decr num2
(integer) -1
redis 127.0.0.1:6379> incrby num 5
(integer) 6
redis 127.0.0.1:6379> incrby num3 5
(integer) 5
redis 127.0.0.1:6379> decrby num3 2
(integer) 3
redis 127.0.0.1:6379> append num 5
(integer) 2
redis 127.0.0.1:6379> get num
"65"
redis 127.0.0.1:6379> append num4 4
(integer) 1
redis 127.0.0.1:6379> get num4
"4"

存储String常用命令

13、存储Hash
String Key和String Value的map容器
每一个Hash可以存储4294967295个键值对

   储存Hash常用命令：
       赋值
       取值删除增加数字
       自学命令

 1 redis 127.0.0.1:6379> hset myhash username jack
 2 (integer) 1
 3 redis 127.0.0.1:6379> hset myhash age 18
 4 (integer) 1
 5 redis 127.0.0.1:6379> hmset myhash2 username rose age 21
 6 OK
 7 redis 127.0.0.1:6379> hget myhash username
 8 "jack"
 9 redis 127.0.0.1:6379> hget myhash age
10 "18"
11 redis 127.0.0.1:6379> hmget myhash username age
12 1) "jack"
13 2) "18"
14 redis 127.0.0.1:6379> hgetall myhash
15 1) "username"
16 2) "jack"
17 3) "age"
18 4) "18"
19 redis 127.0.0.1:6379> hdel myhash2 username
20 (integer) 1
21 redis 127.0.0.1:6379> hgetall myhash2
22 1) "age"
23 2) "21"
24 redis 127.0.0.1:6379> del myhash2
25 (integer) 1
26 redis 127.0.0.1:6379> hgetall myhash2
27 (empty list or set)
28 redis 127.0.0.1:6379> hincrby myhash age 5
29 (integer) 23
30 redis 127.0.0.1:6379> hexists myhash username
31 (integer) 1
32 redis 127.0.0.1:6379> hexists myhash password
33 (integer) 0
34 redis 127.0.0.1:6379> hlen myhash
35 (integer) 2
36 redis 127.0.0.1:6379> hkeys myhash
37 1) "username"
38 2) "age"
39 redis 127.0.0.1:6379> hvalues myhash
40 (error) ERR unknown command 'hvalues'
41 redis 127.0.0.1:6379> hvals myhash
42 1) "jack"
43 2) "23"

存储Hash常用命令

14、存储list
   ArrayList使用数组方式
   LinkedList使用双向链接方式
   双向链表中增加数据
   双向链表中删除数据

   存储list常用命令：
       两端添加
       两端弹出
       扩展命令
       查看列表
       获取列表元素个数

  1 redis 127.0.0.1:6379> lpush mylist a b c
  2 (integer) 3
  3 redis 127.0.0.1:6379> lpush mylist 1 2 3
  4 (integer) 6
  5 redis 127.0.0.1:6379> rpush mylist2 a b c
  6 (integer) 3
  7 redis 127.0.0.1:6379> rpush mylist2 1 2 3
  8 (integer) 6
  9 redis 127.0.0.1:6379> lrange mylist 0 5 
 10 1) "3"
 11 2) "2"
 12 3) "1"
 13 4) "c"
 14 5) "b"
 15 6) "a"
 16 redis 127.0.0.1:6379> lrange mylist2 0 -1
 17 1) "a"
 18 2) "b"
 19 3) "c"
 20 4) "1"
 21 5) "2"
 22 6) "3"
 23 redis 127.0.0.1:6379> lrange mylist2 0 -2
 24 1) "a"
 25 2) "b"
 26 3) "c"
 27 4) "1"
 28 5) "2"
 29 redis 127.0.0.1:6379> lpop mylist
 30 "3"
 31 redis 127.0.0.1:6379> lrange mylist 0 -1
 32 1) "2"
 33 2) "1"
 34 3) "c"
 35 4) "b"
 36 5) "a"
 37 redis 127.0.0.1:6379> rpop mylist 
 38 "a"
 39 redis 127.0.0.1:6379> lrange mylist2 0 -1
 40 1) "a"
 41 2) "b"
 42 3) "c"
 43 4) "1"
 44 5) "2"
 45 6) "3"
 46 redis 127.0.0.1:6379> rpop mylist2 
 47 "3"
 48 redis 127.0.0.1:6379> rpop mylist2 
 49 "2"
 50 redis 127.0.0.1:6379> lrange mylist2 0 -1
 51 1) "a"
 52 2) "b"
 53 3) "c"
 54 4) "1"
 55 redis 127.0.0.1:6379> llen mylist
 56 (integer) 4
 57 redis 127.0.0.1:6379> llen mylist2
 58 (integer) 4
 59 redis 127.0.0.1:6379> llen mylist3
 60 (integer) 0
 61 redis 127.0.0.1:6379> lpushx mylist x
 62 (integer) 5
 63 redis 127.0.0.1:6379> lrange mylist 0 -1
 64 1) "x"
 65 2) "2"
 66 3) "1"
 67 4) "c"
 68 5) "b"
 69 redis 127.0.0.1:6379> lpushx mylist3 x
 70 (integer) 0
 71 redis 127.0.0.1:6379> rpushx mylist2 x
 72 (integer) 5
 73 redis 127.0.0.1:6379> lrange mylist2
 74 (error) ERR wrong number of arguments for 'lrange' command
 75 redis 127.0.0.1:6379> lrange mylist2 0 -1
 76 1) "a"
 77 2) "b"
 78 3) "c"
 79 4) "1"
 80 5) "x"
 81 redis 127.0.0.1:6379> lpush mylist3 1 2 3
 82 (integer) 3
 83 redis 127.0.0.1:6379> lpush mylist3 1 2 3
 84 (integer) 6
 85 redis 127.0.0.1:6379> lpush mylist3 1 2 3
 86 (integer) 9
 87 redis 127.0.0.1:6379> lrange mylist3 0 -1
 88 1) "3"
 89 2) "2"
 90 3) "1"
 91 4) "3"
 92 5) "2"
 93 6) "1"
 94 7) "3"
 95 8) "2"
 96 9) "1"
 97 redis 127.0.0.1:6379> lrem mylist3 2 3
 98 (integer) 2
 99 redis 127.0.0.1:6379> lrange mylist3 0 -1
100 1) "2"
101 2) "1"
102 3) "2"
103 4) "1"
104 5) "3"
105 6) "2"
106 7) "1"
107 redis 127.0.0.1:6379> lrem mylist3 -2 1
108 (integer) 2
109 redis 127.0.0.1:6379> lrange mylist3 0 -1
110 1) "2"
111 2) "1"
112 3) "2"
113 4) "3"
114 5) "2"
115 redis 127.0.0.1:6379> lrem mylist3 0 2
116 (integer) 3
117 redis 127.0.0.1:6379> lrange mylist3 0 -1
118 1) "1"
119 2) "3"
120 redis 127.0.0.1:6379> lrange mylist 0 -1
121 1) "x"
122 2) "2"
123 3) "1"
124 4) "c"
125 5) "b"
126 redis 127.0.0.1:6379> lset mylist 3 mmm
127 OK
128 redis 127.0.0.1:6379> lrange mylist 0 -1
129 1) "x"
130 2) "2"
131 3) "1"
132 4) "mmm"
133 5) "b"
134 redis 127.0.0.1:6379> lpush mylist4 a b c 
135 (integer) 3
136 redis 127.0.0.1:6379> lpush mylist4 a b c 
137 (integer) 6
138 redis 127.0.0.1:6379> lrange mylist4 0 -1
139 1) "c"
140 2) "b"
141 3) "a"
142 4) "c"
143 5) "b"
144 6) "a"
145 redis 127.0.0.1:6379> linsert mylist4 before b 11
146 (integer) 7
147 redis 127.0.0.1:6379> lrange mylist4 0 -1
148 1) "c"
149 2) "11"
150 3) "b"
151 4) "a"
152 5) "c"
153 6) "b"
154 7) "a"
155 redis 127.0.0.1:6379> linsert mylist4 after b 22
156 (integer) 8
157 redis 127.0.0.1:6379> lrange mylist4 0 -1
158 1) "c"
159 2) "11"
160 3) "b"
161 4) "22"
162 5) "a"
163 6) "c"
164 7) "b"
165 8) "a"
166 redis 127.0.0.1:6379> lpush mylist5 1 2 3
167 (integer) 3
168 redis 127.0.0.1:6379> lpush mylist6 a b c
169 (integer) 3
170 redis 127.0.0.1:6379> rpoplpush mylist5 mylist6
171 "1"
172 redis 127.0.0.1:6379> lrange mylist5 0 -1
173 1) "3"
174 2) "2"
175 redis 127.0.0.1:6379> lrange mylist6 0 -1
176 1) "1"
177 2) "c"
178 3) "b"
179 4) "a"

存储list常用命令

15、存储Set
   和List类型不同的是，Set集合中不允许出现重复的元素

   存储set常用命令：
       添加/删除元素
       获得集合中的元素
       集合中的差集运算
       集合中的交集运算
       集合中的并集运算
       扩展命令

 1 redis 127.0.0.1:6379> sadd myset a b c
 2 (integer) 3
 3 redis 127.0.0.1:6379> sadd myset a
 4 (integer) 0
 5 redis 127.0.0.1:6379> sadd myset 1 2 3
 6 (integer) 3
 7 redis 127.0.0.1:6379> srem myset 1 2
 8 (integer) 2
 9 redis 127.0.0.1:6379> smembers myset
10 1) "3"
11 2) "c"
12 3) "a"
13 4) "b"
14 redis 127.0.0.1:6379> sismember myset a
15 (integer) 1
16 redis 127.0.0.1:6379> sismember myset 6
17 (integer) 0
18 redis 127.0.0.1:6379> saaa mya1 a b c
19 (error) ERR unknown command 'saaa'
20 redis 127.0.0.1:6379> sadd mya1 a b c
21 (integer) 3
22 redis 127.0.0.1:6379> sadd mya2 a c 1 2
23 (integer) 4
24 redis 127.0.0.1:6379> sdiff mya1 mya2
25 1) "b"
26 redis 127.0.0.1:6379> sinter mya1 mya2
27 1) "c"
28 2) "a"
29 redis 127.0.0.1:6379> sunion mya1 mya2
30 1) "1"
31 2) "a"
32 3) "b"
33 4) "c"
34 5) "2"
35 redis 127.0.0.1:6379> smembers myset
36 1) "3"
37 2) "c"
38 3) "a"
39 4) "b"
40 redis 127.0.0.1:6379> scard myset
41 (integer) 4
42 redis 127.0.0.1:6379> srandmember myset
43 "a"
44 redis 127.0.0.1:6379> srandmember myset
45 "a"
46 redis 127.0.0.1:6379> srandmember myset
47 "3"
48 redis 127.0.0.1:6379> sdiffstore my1  mya1 mya2 
49 (integer) 1
50 redis 127.0.0.1:6379> smembers my1
51 1) "b"
52 redis 127.0.0.1:6379> sinterstore my2 mya1 mya2
53 (integer) 2
54 redis 127.0.0.1:6379> smembers my2
55 1) "c"
56 2) "a"
57 redis 127.0.0.1:6379> sunionstore my3 mya1 mya2
58 (integer) 5
59 redis 127.0.0.1:6379> smembers my3
60 1) "1"
61 2) "a"
62 3) "b"
63 4) "c"
64 5) "2"

储存Set常用命令

   存储Set使用场景
       跟踪一些唯一性数据
       用于维护数据对象之间的关联关系

16、存储Sorted-Set
   Sorted-Set中的成员在集合中的位置是有序的

   存储Sorted-Set常用命令：
       添加元素
       删除元素
       获得元素
       范围查询
       扩展命令

 1 redis 127.0.0.1:6379> zadd mysort 70 zs 80 ls 90 ww
 2 (integer) 3
 3 redis 127.0.0.1:6379> zadd mysort zs
 4 (error) ERR wrong number of arguments for 'zadd' command
 5 redis 127.0.0.1:6379> zadd mysort 100 zs
 6 (integer) 0
 7 redis 127.0.0.1:6379> zadd mysort 60 tom
 8 (integer) 1
 9 redis 127.0.0.1:6379> zscore mysort zs
10 "100"
11 redis 127.0.0.1:6379> zcard mysort
12 (integer) 4
13 redis 127.0.0.1:6379> zrem mysort tom ww
14 (integer) 2
15 redis 127.0.0.1:6379> zcard mysort
16 (integer) 2
17 redis 127.0.0.1:6379> zadd mysort 85 jack 95 rose
18 (integer) 2
19 redis 127.0.0.1:6379> zrange mysort 0 -1
20 1) "ls"
21 2) "jack"
22 3) "rose"
23 4) "zs"
24 redis 127.0.0.1:6379> zrange mysort 0 -1 withscores
25 1) "ls"
26 2) "80"
27 3) "jack"
28 4) "85"
29 5) "rose"
30 6) "95"
31 7) "zs"
32 8) "100"
33 redis 127.0.0.1:6379> zrevrange mysort 0 -1 withscores
34 1) "zs"
35 2) "100"
36 3) "rose"
37 4) "95"
38 5) "jack"
39 6) "85"
40 7) "ls"
41 8) "80"
42 redis 127.0.0.1:6379> zremrangebyrank mysort 0 4
43 (integer) 4
44 redis 127.0.0.1:6379> zrevrange mysort 0 -1 withscores
45 (empty list or set)
46 redis 127.0.0.1:6379> zadd mysort 80 zs 90 ls 100 ww
47 (integer) 3
48 redis 127.0.0.1:6379> zremrangebyscore mysort 80 100
49 (integer) 3
50 redis 127.0.0.1:6379> zrevrange mysort 0 -1 withscores
51 (empty list or set)
52 redis 127.0.0.1:6379> zadd mysort 70 zs 80 ls 90 ww
53 (integer) 3
54 redis 127.0.0.1:6379> zrangebyscore mysort 0 100
55 1) "zs"
56 2) "ls"
57 3) "ww"
58 redis 127.0.0.1:6379> zrangebyscore mysort 0 100 withscore
59 (error) ERR syntax error
60 redis 127.0.0.1:6379> zrangebyscore mysort 0 100 withscores
61 1) "zs"
62 2) "70"
63 3) "ls"
64 4) "80"
65 5) "ww"
66 6) "90"
67 redis 127.0.0.1:6379> byscore mysort 0 100 withscores limit 0 2
68 1) "zs"
69 2) "70"
70 3) "ls"
71 4) "80"
72 redis 127.0.0.1:6379> zincrby mysort 3 ls
73 "83"
74 redis 127.0.0.1:6379> zscore mysort ls
75 "83"
76 redis 127.0.0.1:6379> zcount mysort 80 90
77 (integer) 2

Sorted-Set常用命令

   Sorted-Set使用场景
       大型在线游戏积分排行榜
       构建索引数据

17、Redis特性
   切换数据库
       select 0
   移动key到某一个数据库
       move key 1
   开启事务
       multi
   提交事务
       exec
   回滚事务
       discard

18、Redis持久化
   持久化方式：
       RDB方式(配置以多少秒将数据储存到硬盘)
       AOF方式(读取日志文件)
       无持久化(缓存方式)
       同时使用RDB和AOF

秒客网

Redis的简单使用和介绍

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