3、Redis客户端
3.1 Redis自带的客户端
带密码进入客户端
[root@qianfeng01 redis-4.0.14]# src/redis-cli -h 192.168.10.101 -p 6379 -a root Warning: Using a password with '-a' option on the command line interface may not be safe. 192.168.10.101:6379> keys * (empty list or set)
带密码并选择数据库进入命令行
[root@qianfeng01 redis-4.0.14]# src/redis-cli -h 192.168.10.101 -p 6379 -a root -n 1
切换数据库
192.168.10.101:6379> select 2 OK 192.168.10.101:6379[2]>
3.3 桌面客户端
下载：Release 0.8.8 · RedisInsight/RedisDesktopManager · GitHub
安装：下载完成后双击打开，选择安装路径即可
连接Redis服务器
3.5 Redis命令行操作
3.5.1 String类型
Set 129.0.0.1Redis.assets6379> set str1 angelababy OK Get 129.0.0.1Redis.assets6379> get str1 " angelababy" Del 129.0.0.1Redis.assets6379> del str1 (integer) 1 自增 必须value为数字类型 129.0.0.1Redis.assets6379> set s1 1 OK 129.0.0.1Redis.assets6379> incr s1 (integer) 2 129.0.0.1Redis.assets6379> incr s1 (integer) 3 129.0.0.1Redis.assets6379> incr s1 (integer) 4 129.0.0.1Redis.assets6379> incr s1 (integer) 5 自减 129.0.0.1Redis.assets6379> decr s1 (integer) 4 129.0.0.1Redis.assets6379> decr s1 (integer) 3 129.0.0.1Redis.assets6379> decr s1 (integer) 2 129.0.0.1Redis.assets6379> decr s1 自增自减指定数值 129.0.0.1Redis.assets6379> incrby s1 3 (integer) 4 129.0.0.1Redis.assets6379> decrby s1 3 (integer) 1 设置或者获取多个key/value 129.0.0.1Redis.assets6379> mset s1 v1 s2 v2 OK 129.0.0.1Redis.assets6379> mget s1 s2 1) "v1" 2) "v2"
3.5.2 Hash命令
hash叫散列类型，它提供了字段和字段值的映射。字段值只能是字符串类型，不支持散列类型、集合类型等其它类型。如下：
-
hset 在redis中，命令是不区分大小写，但是key区分大小写
129.0.0.1Redis.assets6379> hset m1 k1 v1 (integer) 1 129.0.0.1Redis.assets6379> HSET m1 k1 v1 (integer) 0
-
hget
129.0.0.1Redis.assets6379> hget m1 k1 "v1" 129.0.0.1Redis.assets6379> hget m1 (error) ERR wrong number of arguments for 'hget' command 129.0.0.1Redis.assets6379>
-
hdel
129.0.0.1Redis.assets6379> hdel m1 (error) ERR wrong number of arguments for 'hdel' command 129.0.0.1Redis.assets6379> hdel m1 k1 (integer) 1
-
批量操作
129.0.0.1Redis.assets6379> hmset m1 k1 v1 k2 v2 OK 129.0.0.1Redis.assets6379> hmget m1 k1 k2 1) "v1" 2) "v2" 129.0.0.1Redis.assets6379> hmget m1 k1 k2 k3 1) "v1" 2) "v2" 3) (nil)
-
增加数值
129.0.0.1Redis.assets6379> hincrby m2 k1 (error) ERR wrong number of arguments for 'hincrby' command 129.0.0.1Redis.assets6379> hincrby m2 k1 2 (integer) 3
-
判断字段是否存在 HEXISTS key field
129.0.0.1Redis.assets6379> hexists user age 查看user中是否有age字段 (integer) 1 129.0.0.1Redis.assets6379> hexists user name 查看user中是否有name字段 (integer) 0
3.5.3 List列表
192.168.10.101:6379> LPUSH l1 1 2 6 5 9 8 (integer) 6 192.168.10.101:6379> LRANGE l1 0 -1 1) "8" 2) "9" 3) "5" 4) "6" 5) "2" 6) "1" 192.168.10.101:6379> LRANGE l1 0 2 1) "8" 2) "9" 3) "5" 192.168.10.101:6379> LRANGE l1 0 1 1) "8" 2) "9" 192.168.10.101:6379> LPOP l1 "8" 192.168.10.101:6379> LRANGE l1 0 1 1) "9" 2) "5" 192.168.10.101:6379> LPOP l1 "9" 192.168.10.101:6379> LPOP l1 "5" 192.168.10.101:6379> LPOP l1 "6" 192.168.10.101:6379> LRANGE l1 0 -1 1) "2" 2) "1"
其它列表List、集合Set和有序集合ZSet类型的命令我们不再赘述，大家有时间再学习。
3.6 Java客户端连接
3.6.1 JedisAPI连接
Jedis就是Redis的客户端连接对象，也就是创建的实例连接的Connection对象，类似于MySQL的JDBC-Driver驱动。
3.7.2 单机连接
创建Maven工程，导入Pom依赖
<!--Redis依赖--> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>3.0.0</version> </dependency>
代码实现
package com.qianfeng.sparkstreaming
import redis.clients.jedis.Jedis
/**
* redis测试
*/
object Demo01_RedisTest {
def main(args: Array[String]): Unit = {
// 创建Jedis连接实例对象// 创建Jedis连接实例对象
val jedis = new Jedis("192.168.10.101", 6379)
// 密码验证
jedis.auth("root")
jedis.select(index=2) //选择数据库
// 测试连接
println(jedis.ping())
//字符串插入
jedis.set("k1","vv")
println(jedis.get( "k1"))
//数组
jedis.lpush( key = "l1" ,strings = "1"，"3"，"8", "6")
println(jedis.lrange( key = "l1",start = 0,stop = 2))//查询top3
//关闭jedis对象
jedis.close()
}
}Guff_hys_python数据结构,大数据开发学习,python实训项目-CSDN博客
