Redis客户端

一、Java客户端：Jedis

1.获取Jedis

Jedis是什么？
Maven依赖

<dependency>
   <groupId>redis.clients</groupId>
   <artifactId>jedis</artifactId>
   <version>2.9.0</version>
   <type>jar</type>
   <scope>compile</scope>
</dependency>

Jedis直连

#1.生成一个Jedis对象，这个对象负责和指定Redis节点进行通信
Jedis jedis = new Jedis("127.0.0.1",6379);
#2.jedis操作set
jedis.set("hello","world");
#3.jedis执行get操作,value=“world”
String value = jedis.get("hello");

Jedis(String host,int port,int connectionTimeout,int soTimeout)
host：Redis节点的所在机器的IP
port：Redis节点的端口
connectionTimecout：客户端连接超时
soTimeout：客户端读写超时

简单使用

1.string
//输出结果ok
jedis.set("hello","world");
//输出结果:world
jedis.get("hello")
//输出结果：1
jsdis.incr("counter");

2.hash
jedis.hset("myhash","f1","v1");
jedis.hset("myhash","f2","v2");
//输出结果{f1=f2,f2=v2}
jedis.hgetAll("myhash");

3.list
jedis.rpush("mylist","1");
jedis.rpush("mylist","2");
jedis.rpush("mylist","3");
//输出结果：[1,2,3]
jedis.lrange("mylist",0,-1);

4.set
jedis.sadd("myset","a");
jedis.sadd("myset","b");
jedis.sadd("myset","a");
//输出结果：[b,a]
jedis.smembers("myset");

5.zset
jedis.zadd("myset",99,"tom");
jedis.zadd("myset",66,"peter");
jedis.zadd("myset",33,"james");
//输出结果：[[["james"],33.0],[["pater"],66.0],[["tom"],99.0]]
jedis.zrangeWithScorces("myzset",0,-1);

2.Jedis连接池

(1)Jedis直连

image.png

(2)Jedis连接池

image.png

(3)方案对比

image.png

(4)JedisPool使用

初始化Jedis连接池，通常来讲JedisPool是单例的。GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();
JedisPool jedisPool = new JedisPool(poolConfig,"127.0.0.1",6379);

Jedis jedis =  null;
try{
      //1.从连接池获取jedis对象
      jedis = jedisPool.getResource();
      //2.执行操作  
      jedis.set("hello","world");
}catch(Exception e){
      e.printStackTrace();
}
finally{
       if(jedis!=null)
      //如果使用JedisPool,close操作不是关闭连接，代表归还连接池
        jedis.close();
}

二、Python客户端：redis-py

1.获取redis-py

（1）pip install redis
（2）easy_install redis
（3）源码安装

wget https://github.com/andymccurdy/redis-py/archive/2.10.5.zip 
unzip redis-2.10.5.zip
cd redis-2.10.5
#安装redis-py
sudo python setup.py install

import redis
client = redis.StrictRedis(host='127.0.0.1',port=6379)
key = "hello"
setResult = client.set(key,"python-redis")
print(setResult)
vaule = client.get(key)
print("key:"+key+",value:"+vaule)

使用同上