redis下载地址 https://redis.io/
Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. Redis provides data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes, and streams. Redis has built-in replication, Lua scripting, LRU eviction, transactions, and different levels of on-disk persistence, and provides high availability via Redis Sentinel and automatic partitioning with Redis Cluster.
From source code
Download, extract and compile Redis with
$ 在虚拟机进入usr目录，创建mkdir redis$ wget https://download.redis.io/releases/redis-6.2.6.tar.gz$ tar xzf redis-6.2.6.tar.gz$ cd redis-6.2.6$ make
The binaries that are now compiled are available in the src
directory. Run Redis with
$ 启动Redis数据库cd / redisyum install gccyum install wget开发端口firewall-cmd --zone=public --add-port=6379/tcp --permanent设置防火墙firewall-cmd --reloadThe binaries that are now compiled are available in the src directory. Run Redis with:
You can interact with Redis using the built-in client
$ 使用客户端编辑数据库$ src/redis-cliredis> set foo barOKredis> get foo"bar"
start-up start and stop
$ 启动redis服务./src/redis-server redis.conf$ 查看是否启动redisnetstat -tulpn$ 关闭进程./src/redis-cli shutdown
Redis的常见配置
| 配置项 | 示例 | 说明 |
| daemonize | daemonize yes | 是否启用后台运行，默认no |
| port | port 6379 | 设置端口号，默认6379 |
| logfile | logfile 日志文件 | 设置日志文件 |
| databases | databases 255 | 设置redis数据库总量 |
| dir | dir 数据文件目录 | 设置数据文件存储目录 |
| requirepass | requirepass admin | 设置使用密码 |
Hash命令
| 命令 | 示例 | 说明 |
| hget | hget student age | 获取hash中key=age |
| hset | hset student age 23 | 设置hash中age=23 |
hmset hmget hgetall | hmset student age 30 name 18 hgetall student | 设置hash多个值 获取hash多个值 获取hash所有值 |
| hdel | hdel student age | 删除student的age |
| hexists | hexists student name | 检查是否存在 |
| hlen | hlen student | 获取指定长度 |
code&&java
Jedis is a Java client for Redis designed for performance and ease of use.
https://github.com/redis/jedis
Getting started
To get started with Jedis, first add it as a dependency in your Java project. If you're using Maven, that looks like this:
<dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>2.9.0</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.54</version></dependency>
Next, you'll need to connect to Redis. For many applications, it's best to use a connection pool. You can instantiate a Jedis connection pool like so:
JedisPool pool = new JedisPool("服务器地址", 6379);
Once you have a JedisPool
instance, you can use a try-with-resources block to get a connection and run Redis commands.
try (Jedis jedis = pool.getResource()) {jedis.set("clientName", "Jedis");}
JedisTestor.java
package com.imooc.jedis;import java.util.List;import redis.clients.jedis.Jedis;public class JedisTestor {public static void main(String[] args) {Jedis jedis = new Jedis("192.168.182.144",6379);try {jedis.select(2);System.out.println("Redis连接成功");-------- 添加字符串 --------// 设置sn数据jedis.set("sn","7781-9938");// 获取数据String sn = jedis.get("sn");System.out.println(sn);// 设置多条数据jedis.mset(new String[] {"title","java书籍","num","20"});// 接收List集合List<String> goods = jedis.mget(new String[] {"sn","title","num"});System.out.println(goods);// 数字类型自增+1Long num = jedis.incr("num");System.out.println(num);-------- 添加Hash --------jedis.hset("student:3312", "name", "小明");String name = jedis.hget("student:3312", "name");System.out.println(name);Map<String,String> map = new HashMap<String,String>();map.put("name", "我是king");map.put("age","18");map.put("id","3313");jedis.hmset("student:3113", map);Map<String,String> smap = jedis.hgetAll("student:3113");System.out.println(smap);-------- 添加集合 --------jedis.del("letter");jedis.rpush("letter", new String[] {"d","e","f"});jedis.lpush("letter", new String[] {"c","b","a"});jedis.lpop("letter");jedis.rpop("letter");List<String> list = jedis.lrange("letter", 0, -1);System.out.print(list);} catch(Exception e) {e.printStackTrace();jedis.close();}}}
e
