"前言：　　 Redis 是一款开源的、高性能的键 - 值存储（key-value store）。它常被称作是一款数据结构服务器（data structure server）。Redis 的键值可以包括字符串（strings）类型，同时它还包括哈希（hashes）、列表（lists）、集合（sets ...."

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AI开发者社区 • 0 回帖 • 1 浏览 • 5 个月前

java加载redis以及基本操作

前言：

　　 Redis 是一款开源的、高性能的键 - 值存储（key-value store）。它常被称作是一款数据结构服务器（data structure server）。Redis 的键值可以包括字符串（strings）类型，同时它还包括哈希（hashes）、列表（lists）、集合（sets）和有序集合（sorted sets）等数据类型。对于这些数据类型，你可以执行原子操作。例如：对字符串进行附加操作（append）；递增哈希中的值；向列表中增加元素；计算集合的交集、并集与差集等。

　　为了获得优异的性能，Redis 采用了内存中（in-memory）数据集（dataset）的方式。同时，Redis 支持数据的持久化，你可以每隔一段时间将数据集转存到磁盘上（snapshot），或者在日志尾部追加每一条操作命令（append only file,aof）。

Redis 同样支持主从复制（master-slave replication），并且具有非常快速的非阻塞首次同步（ non-blocking first synchronization）、网络断开自动重连等功能。同时 Redis 还具有其它一些特性，其中包括简单的事物支持、发布订阅（ pub/sub）、管道（pipeline）和虚拟内存（vm）等。
Redis 具有丰富的客户端，支持现阶段流行的大多数编程语言。

　　项目中使用 redis 后，在数据加载方面，当第一次查询时存入 redis，数据改变时会先更新 redis 中的数据，而后对数据库进行操作，redis 会占用本地运行内存，因此当数据以后加载时省略查询数据库的途径，直接从运行内存中加载数据，时间上会缩短很多，但是当 redis 服务关闭时，所有数据也会消失，不过 redis 也有持久化功能可以解决瞬时化。

一，redis 关系型数据库的下载配置和安装

　　下载 redis 网址：https://pan.baidu.com/s/124mjcA-WB6P37menJA59wg

　　解压后可以看到目录

几个 exe 程序的功能：　　　　

　　　　　 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).

　　　　　redis-check-aof.exe：更新日志检查

　　　　　redis-check-dump.exe：本地数据库检查

　　　　　redis-cli.exe：客户端

　　　　　redis-server.exe：服务端　　

首先打开 redis-server.exe：服务端，

再打开　redis-cli.exe：客户端（顺序不可颠倒， redis-server.exe：服务端不可关闭），

二，java 连接 redis，实现功能如下：

　　1. 键空间通知（keyspace notification）

　　2. 事务（transaction）

　　3. 发布与订阅（pub/sub）

　　4. 复制（Replication）

　　5. 通信协议（protocol）

　　6. 持久化（persistence）

　　7.Sentinel

　　8. 集群

三，项目结构

　　1. 项目 jar 包如下：

　　2. 主要类

　　　　（1）功能类

package com.redis;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.JedisShardInfo;
import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;
import redis.clients.jedis.SortingParams;
/**
 * 池的配置与连接
 * 函数的使用
 * @author xutao
 *2018 年 12 月 21 日
 */
public class RedisClient {
</span><span style="color: rgba(0, 0, 255, 1)">private</span> Jedis jedis;<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">非切片额客户端连接</span>
<span style="color: rgba(0, 0, 255, 1)">private</span> JedisPool jedisPool;<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">非切片连接池</span>
<span style="color: rgba(0, 0, 255, 1)">private</span> ShardedJedis shardedJedis;<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">切片额客户端连接</span>
<span style="color: rgba(0, 0, 255, 1)">private</span> ShardedJedisPool shardedJedisPool;<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">切片连接池</span>

<span style="color: rgba(0, 0, 255, 1)">public</span><span style="color: rgba(0, 0, 0, 1)"> RedisClient() 
{ 
    initialPool(); 
    initialShardedPool(); 
    shardedJedis </span>=<span style="color: rgba(0, 0, 0, 1)"> shardedJedisPool.getResource(); 
    jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource(); 
    
    
} 

</span><span style="color: rgba(0, 128, 0, 1)">/**</span><span style="color: rgba(0, 128, 0, 1)">
 * 初始化非切片池
 </span><span style="color: rgba(0, 128, 0, 1)">*/</span>
<span style="color: rgba(0, 0, 255, 1)">private</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> initialPool() 
{ 
    </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 池基本配置 </span>
    JedisPoolConfig config = <span style="color: rgba(0, 0, 255, 1)">new</span><span style="color: rgba(0, 0, 0, 1)"> JedisPoolConfig(); 
    config.setMaxActive(</span>20<span style="color: rgba(0, 0, 0, 1)">); 
    config.setMaxIdle(</span>5<span style="color: rgba(0, 0, 0, 1)">); 
    config.setMaxWait(</span>1000l<span style="color: rgba(0, 0, 0, 1)">); 
    config.setTestOnBorrow(</span><span style="color: rgba(0, 0, 255, 1)">false</span><span style="color: rgba(0, 0, 0, 1)">); 
    
    jedisPool </span>= <span style="color: rgba(0, 0, 255, 1)">new</span> JedisPool(config,"127.0.0.1",6379<span style="color: rgba(0, 0, 0, 1)">);
}

</span><span style="color: rgba(0, 128, 0, 1)">/**</span><span style="color: rgba(0, 128, 0, 1)"> 
 * 初始化切片池 
 </span><span style="color: rgba(0, 128, 0, 1)">*/</span> 
<span style="color: rgba(0, 0, 255, 1)">private</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> initialShardedPool() 
{ 
    </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 池基本配置 </span>
    JedisPoolConfig config = <span style="color: rgba(0, 0, 255, 1)">new</span><span style="color: rgba(0, 0, 0, 1)"> JedisPoolConfig(); 
    config.setMaxActive(</span>20<span style="color: rgba(0, 0, 0, 1)">); 
    config.setMaxIdle(</span>5<span style="color: rgba(0, 0, 0, 1)">); 
    config.setMaxWait(</span>1000l<span style="color: rgba(0, 0, 0, 1)">); 
    config.setTestOnBorrow(</span><span style="color: rgba(0, 0, 255, 1)">false</span><span style="color: rgba(0, 0, 0, 1)">); 
    </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> slave链接 </span>
    List&lt;JedisShardInfo&gt; shards = <span style="color: rgba(0, 0, 255, 1)">new</span> ArrayList&lt;JedisShardInfo&gt;<span style="color: rgba(0, 0, 0, 1)">(); 
    shards.add(</span><span style="color: rgba(0, 0, 255, 1)">new</span> JedisShardInfo("127.0.0.1", 6379<span style="color: rgba(0, 0, 0, 1)">)); 

    </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 构造池 </span>
    shardedJedisPool = <span style="color: rgba(0, 0, 255, 1)">new</span><span style="color: rgba(0, 0, 0, 1)"> ShardedJedisPool(config, shards); 
} 

</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> show() {     
    KeyOperate(); 
    StringOperate(); 
    ListOperate(); 
    SetOperate();
    SortedSetOperate();
    HashOperate(); 
    jedisPool.returnResource(jedis);
    shardedJedisPool.returnResource(shardedJedis);
} 

</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> KeyOperate() {
      System.out.println(</span>"=========********************=========key=========================="<span style="color: rgba(0, 0, 0, 1)">); 
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 清空数据 </span>
      System.out.println("清空库中所有数据："+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 判断key否存在 </span>
      System.out.println("判断key999键是否存在："+shardedJedis.exists("key999"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"新增key001,value001键值对："+shardedJedis.set("key001", "value001"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"判断key001是否存在："+shardedJedis.exists("key001"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 输出系统中所有的key</span>
      System.out.println("新增key002,value002键值对："+shardedJedis.set("key002", "value002"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"系统中所有键如下："<span style="color: rgba(0, 0, 0, 1)">);
      Set</span>&lt;String&gt; keys = jedis.keys("*"<span style="color: rgba(0, 0, 0, 1)">); 
      Iterator</span>&lt;String&gt; it=<span style="color: rgba(0, 0, 0, 1)">keys.iterator() ;   
      </span><span style="color: rgba(0, 0, 255, 1)">while</span><span style="color: rgba(0, 0, 0, 1)">(it.hasNext()){   
          String key </span>=<span style="color: rgba(0, 0, 0, 1)"> it.next();   
          System.out.println(key);   
      }
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 删除某个key,若key不存在，则忽略该命令。</span>
      System.out.println("系统中删除key002: "+jedis.del("key002"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"判断key002是否存在："+shardedJedis.exists("key002"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 设置 key001的过期时间</span>
      System.out.println("设置 key001的过期时间为5秒:"+jedis.expire("key001", 5<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 0, 255, 1)">try</span><span style="color: rgba(0, 0, 0, 1)">{ 
          Thread.sleep(</span>2000<span style="color: rgba(0, 0, 0, 1)">); 
      } 
      </span><span style="color: rgba(0, 0, 255, 1)">catch</span><span style="color: rgba(0, 0, 0, 1)"> (InterruptedException e){ 
      } 
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 查看某个key的剩余生存时间,单位【秒】.永久生存或者不存在的都返回-1</span>
      System.out.println("查看key001的剩余生存时间："+jedis.ttl("key001"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 移除某个key的生存时间</span>
      System.out.println("移除key001的生存时间："+jedis.persist("key001"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"查看key001的剩余生存时间："+jedis.ttl("key001"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 查看key所储存的值的类型</span>
      System.out.println("查看key所储存的值的类型："+jedis.type("key001"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">/*</span><span style="color: rgba(0, 128, 0, 1)">
       * 一些其他方法：1、修改键名：jedis.rename("key6", "key0");
       *             2、将当前db的key移动到给定的db当中：jedis.move("foo", 1)
       </span><span style="color: rgba(0, 128, 0, 1)">*/</span><span style="color: rgba(0, 0, 0, 1)">
  }

  </span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> StringOperate() {
      System.out.println(</span>"========********************==============String_1=========================="<span style="color: rgba(0, 0, 0, 1)">); 
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 清空数据 </span>
      System.out.println("清空库中所有数据："+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());
      System.out.println(</span>"=============增============="<span style="color: rgba(0, 0, 0, 1)">);
      jedis.set(</span>"key001","value001"<span style="color: rgba(0, 0, 0, 1)">);
      jedis.set(</span>"key002","value002"<span style="color: rgba(0, 0, 0, 1)">);
      jedis.set(</span>"key003","value003"<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"已新增的3个键值对如下："<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(jedis.get(</span>"key001"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(jedis.get(</span>"key002"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(jedis.get(</span>"key003"<span style="color: rgba(0, 0, 0, 1)">));
      
      System.out.println(</span>"=============删============="<span style="color: rgba(0, 0, 0, 1)">);  
      System.out.println(</span>"删除key003键值对："+jedis.del("key003"<span style="color: rgba(0, 0, 0, 1)">));  
      System.out.println(</span>"获取key003键对应的值："+jedis.get("key003"<span style="color: rgba(0, 0, 0, 1)">));
      
      System.out.println(</span>"=============改============="<span style="color: rgba(0, 0, 0, 1)">);
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">1、直接覆盖原来的数据</span>
      System.out.println("直接覆盖key001原来的数据："+jedis.set("key001","value001-update"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"获取key001对应的新值："+jedis.get("key001"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">2、直接覆盖原来的数据  </span>
      System.out.println("在key002原来值后面追加："+jedis.append("key002","+appendString"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"获取key002对应的新值"+jedis.get("key002"<span style="color: rgba(0, 0, 0, 1)">)); 
 
      System.out.println(</span>"=============增，删，查（多个）============="<span style="color: rgba(0, 0, 0, 1)">);
      </span><span style="color: rgba(0, 128, 0, 1)">/**</span><span style="color: rgba(0, 128, 0, 1)"> 
       * mset,mget同时新增，修改，查询多个键值对 
       * 等价于：
       * jedis.set("name","ssss"); 
       * jedis.set("jarorwar","xxxx"); 
       </span><span style="color: rgba(0, 128, 0, 1)">*/</span><span style="color: rgba(0, 0, 0, 1)">  
      System.out.println(</span>"一次性新增key201,key202,key203,key204及其对应值："+jedis.mset("key201","value201"<span style="color: rgba(0, 0, 0, 1)">,
                      </span>"key202","value202","key203","value203","key204","value204"<span style="color: rgba(0, 0, 0, 1)">));  
      System.out.println(</span>"一次性获取key201,key202,key203,key204各自对应的值："+<span style="color: rgba(0, 0, 0, 1)">
                      jedis.mget(</span>"key201","key202","key203","key204"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"一次性删除key201,key202："+jedis.del(<span style="color: rgba(0, 0, 255, 1)">new</span> String[]{"key201", "key202"<span style="color: rgba(0, 0, 0, 1)">}));
      System.out.println(</span>"一次性获取key201,key202,key203,key204各自对应的值："+<span style="color: rgba(0, 0, 0, 1)">
              jedis.mget(</span>"key201","key202","key203","key204"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println();
              
          
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">jedis具备的功能shardedJedis中也可直接使用，下面测试一些前面没用过的方法</span>
      System.out.println("======================String_2=========================="<span style="color: rgba(0, 0, 0, 1)">); 
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 清空数据 </span>
      System.out.println("清空库中所有数据："+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());       
     
      System.out.println(</span>"=============新增键值对时防止覆盖原先值============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"原先key301不存在时，新增key301："+shardedJedis.setnx("key301", "value301"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"原先key302不存在时，新增key302："+shardedJedis.setnx("key302", "value302"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"当key302存在时，尝试新增key302："+shardedJedis.setnx("key302", "value302_new"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"获取key301对应的值："+shardedJedis.get("key301"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"获取key302对应的值："+shardedJedis.get("key302"<span style="color: rgba(0, 0, 0, 1)">));
      
      System.out.println(</span>"=============超过有效期键值对被删除============="<span style="color: rgba(0, 0, 0, 1)">);
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 设置key的有效期，并存储数据 </span>
      System.out.println("新增key303，并指定过期时间为2秒"+shardedJedis.setex("key303", 2, "key303-2second"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"获取key303对应的值："+shardedJedis.get("key303"<span style="color: rgba(0, 0, 0, 1)">)); 
      </span><span style="color: rgba(0, 0, 255, 1)">try</span><span style="color: rgba(0, 0, 0, 1)">{ 
          Thread.sleep(</span>3000<span style="color: rgba(0, 0, 0, 1)">); 
      } 
      </span><span style="color: rgba(0, 0, 255, 1)">catch</span><span style="color: rgba(0, 0, 0, 1)"> (InterruptedException e){ 
      } 
      System.out.println(</span>"3秒之后，获取key303对应的值："+shardedJedis.get("key303"<span style="color: rgba(0, 0, 0, 1)">)); 
      
      System.out.println(</span>"=============获取原值，更新为新值一步完成============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"key302原值："+shardedJedis.getSet("key302", "value302-after-getset"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"key302新值："+shardedJedis.get("key302"<span style="color: rgba(0, 0, 0, 1)">));
      
      System.out.println(</span>"=============获取子串============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"获取key302对应值中的子串："+shardedJedis.getrange("key302", 5, 7<span style="color: rgba(0, 0, 0, 1)">));  
  }

  </span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> ListOperate() {
      System.out.println(</span>"======********************======list=========================="<span style="color: rgba(0, 0, 0, 1)">); 
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 清空数据 </span>
      System.out.println("清空库中所有数据："+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB()); 

      System.out.println(</span>"=============增============="<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"stringlists", "vector"<span style="color: rgba(0, 0, 0, 1)">); 
      shardedJedis.lpush(</span>"stringlists", "ArrayList"<span style="color: rgba(0, 0, 0, 1)">); 
      shardedJedis.lpush(</span>"stringlists", "vector"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"stringlists", "vector"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"stringlists", "LinkedList"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"stringlists", "MapList"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"stringlists", "SerialList"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"stringlists", "HashList"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"numberlists", "3"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"numberlists", "1"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"numberlists", "5"<span style="color: rgba(0, 0, 0, 1)">);
      shardedJedis.lpush(</span>"numberlists", "2"<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"所有元素-stringlists："+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"所有元素-numberlists："+shardedJedis.lrange("numberlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
      
      System.out.println(</span>"=============删============="<span style="color: rgba(0, 0, 0, 1)">);
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 删除列表指定的值 ，第二个参数为删除的个数（有重复时），后add进去的值先被删，类似于出栈</span>
      System.out.println("成功删除指定元素个数-stringlists："+shardedJedis.lrem("stringlists", 2, "vector"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"删除指定元素之后-stringlists："+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 删除区间以外的数据 </span>
      System.out.println("删除下标0-3区间之外的元素："+shardedJedis.ltrim("stringlists", 0, 3<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"删除指定区间之外元素后-stringlists："+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 列表元素出栈 </span>
      System.out.println("出栈元素："+shardedJedis.lpop("stringlists"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"元素出栈后-stringlists："+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
      
      System.out.println(</span>"=============改============="<span style="color: rgba(0, 0, 0, 1)">);
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 修改列表中指定下标的值 </span>
      shardedJedis.lset("stringlists", 0, "hello list!"<span style="color: rgba(0, 0, 0, 1)">); 
      System.out.println(</span>"下标为0的值修改后-stringlists："+shardedJedis.lrange("stringlists", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"=============查============="<span style="color: rgba(0, 0, 0, 1)">);
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 数组长度 </span>
      System.out.println("长度-stringlists："+shardedJedis.llen("stringlists"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"长度-numberlists："+shardedJedis.llen("numberlists"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 排序 </span>
      <span style="color: rgba(0, 128, 0, 1)">/*</span><span style="color: rgba(0, 128, 0, 1)">
       * list中存字符串时必须指定参数为alpha，如果不使用SortingParams，而是直接使用sort("list")，
       * 会出现"ERR One or more scores can't be converted into double"
       </span><span style="color: rgba(0, 128, 0, 1)">*/</span><span style="color: rgba(0, 0, 0, 1)">
      SortingParams sortingParameters </span>= <span style="color: rgba(0, 0, 255, 1)">new</span><span style="color: rgba(0, 0, 0, 1)"> SortingParams();
      sortingParameters.alpha();
      sortingParameters.limit(</span>0, 3<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"返回排序后的结果-stringlists："+shardedJedis.sort("stringlists"<span style="color: rgba(0, 0, 0, 1)">,sortingParameters)); 
      System.out.println(</span>"返回排序后的结果-numberlists："+shardedJedis.sort("numberlists"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 子串：  start为元素下标，end也为元素下标；-1代表倒数一个元素，-2代表倒数第二个元素</span>
      System.out.println("子串-第二个开始到结束："+shardedJedis.lrange("stringlists", 1, -1<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 获取列表指定下标的值 </span>
      System.out.println("获取下标为2的元素："+shardedJedis.lindex("stringlists", 2)+"\n"<span style="color: rgba(0, 0, 0, 1)">);
  }

  </span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> SetOperate() {
      System.out.println(</span>"=====********************========set=========================="<span style="color: rgba(0, 0, 0, 1)">); 
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 清空数据 </span>
      System.out.println("清空库中所有数据："+<span style="color: rgba(0, 0, 0, 1)">jedis.flushDB());
      
      System.out.println(</span>"=============增============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"向sets集合中加入元素element001："+jedis.sadd("sets", "element001"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"向sets集合中加入元素element002："+jedis.sadd("sets", "element002"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"向sets集合中加入元素element003："+jedis.sadd("sets", "element003"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"向sets集合中加入元素element004："+jedis.sadd("sets", "element004"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"查看sets集合中的所有元素:"+jedis.smembers("sets"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println();
      
      System.out.println(</span>"=============删============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"集合sets中删除元素element003："+jedis.srem("sets", "element003"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"查看sets集合中的所有元素:"+jedis.smembers("sets"<span style="color: rgba(0, 0, 0, 1)">));
      </span><span style="color: rgba(0, 128, 0, 1)">/*</span><span style="color: rgba(0, 128, 0, 1)">System.out.println("sets集合中任意位置的元素出栈："+jedis.spop("sets"));//注：出栈元素位置居然不定？--无实际意义
      System.out.println("查看sets集合中的所有元素:"+jedis.smembers("sets"));</span><span style="color: rgba(0, 128, 0, 1)">*/</span><span style="color: rgba(0, 0, 0, 1)">
      System.out.println();
      
      System.out.println(</span>"=============改============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println();
      
      System.out.println(</span>"=============查============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"判断element001是否在集合sets中："+jedis.sismember("sets", "element001"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"循环查询获取sets中的每个元素："<span style="color: rgba(0, 0, 0, 1)">);
      Set</span>&lt;String&gt; set = jedis.smembers("sets"<span style="color: rgba(0, 0, 0, 1)">);   
      Iterator</span>&lt;String&gt; it=<span style="color: rgba(0, 0, 0, 1)">set.iterator() ;   
      </span><span style="color: rgba(0, 0, 255, 1)">while</span><span style="color: rgba(0, 0, 0, 1)">(it.hasNext()){   
          Object obj</span>=<span style="color: rgba(0, 0, 0, 1)">it.next();   
          System.out.println(obj);   
      }  
      System.out.println();
      
      System.out.println(</span>"=============集合运算============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"sets1中添加元素element001："+jedis.sadd("sets1", "element001"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"sets1中添加元素element002："+jedis.sadd("sets1", "element002"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"sets1中添加元素element003："+jedis.sadd("sets1", "element003"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"sets1中添加元素element002："+jedis.sadd("sets2", "element002"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"sets1中添加元素element003："+jedis.sadd("sets2", "element003"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"sets1中添加元素element004："+jedis.sadd("sets2", "element004"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"查看sets1集合中的所有元素:"+jedis.smembers("sets1"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"查看sets2集合中的所有元素:"+jedis.smembers("sets2"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"sets1和sets2交集："+jedis.sinter("sets1", "sets2"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"sets1和sets2并集："+jedis.sunion("sets1", "sets2"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"sets1和sets2差集："+jedis.sdiff("sets1", "sets2"));<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">差集：set1中有，set2中没有的元素</span>

          
      }
  </span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> SortedSetOperate() {
      System.out.println(</span>"=========********************============zset=========================="<span style="color: rgba(0, 0, 0, 1)">); 
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 清空数据 </span>

          System.out.println(jedis.flushDB());
      System.out.println(</span>"=============增============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"zset中添加元素element001："+shardedJedis.zadd("zset", 7.0, "element001"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"zset中添加元素element002："+shardedJedis.zadd("zset", 8.0, "element002"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"zset中添加元素element003："+shardedJedis.zadd("zset", 2.0, "element003"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"zset中添加元素element004："+shardedJedis.zadd("zset", 3.0, "element004"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"zset集合中的所有元素："+shardedJedis.zrange("zset", 0, -1));<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">按照权重值排序</span>

          System.out.println();
      System.out.println(</span>"=============删============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"zset中删除元素element002："+shardedJedis.zrem("zset", "element002"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"zset集合中的所有元素："+shardedJedis.zrange("zset", 0, -1<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println();
      
      System.out.println(</span>"=============改============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println();
      
      System.out.println(</span>"=============查============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"统计zset集合中的元素中个数："+shardedJedis.zcard("zset"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"统计zset集合中权重某个范围内（1.0——5.0），元素的个数："+shardedJedis.zcount("zset", 1.0, 5.0<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"查看zset集合中element004的权重："+shardedJedis.zscore("zset", "element004"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"查看下标1到2范围内的元素值："+shardedJedis.zrange("zset", 1, 2<span style="color: rgba(0, 0, 0, 1)">));
  }

  </span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> HashOperate() {
      System.out.println(</span>"=====********************=========hash=========================="<span style="color: rgba(0, 0, 0, 1)">);
      </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">清空数据 </span>

          System.out.println(jedis.flushDB());
      System.out.println(</span>"=============增============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"hashs中添加key001和value001键值对："+shardedJedis.hset("hashs", "key001", "value001"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"hashs中添加key002和value002键值对："+shardedJedis.hset("hashs", "key002", "value002"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"hashs中添加key003和value003键值对："+shardedJedis.hset("hashs", "key003", "value003"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"新增key004和4的整型键值对："+shardedJedis.hincrBy("hashs", "key004", 4l<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"hashs中的所有值："+shardedJedis.hvals("hashs"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println();
      
      System.out.println(</span>"=============删============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"hashs中删除key002键值对："+shardedJedis.hdel("hashs", "key002"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"hashs中的所有值："+shardedJedis.hvals("hashs"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println();
      
      System.out.println(</span>"=============改============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"key004整型键值的值增加100："+shardedJedis.hincrBy("hashs", "key004", 100l<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"hashs中的所有值："+shardedJedis.hvals("hashs"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println();
      
      System.out.println(</span>"=============查============="<span style="color: rgba(0, 0, 0, 1)">);
      System.out.println(</span>"判断key003是否存在："+shardedJedis.hexists("hashs", "key003"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"获取key004对应的值："+shardedJedis.hget("hashs", "key004"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"批量获取key001和key003对应的值："+shardedJedis.hmget("hashs", "key001", "key003"<span style="color: rgba(0, 0, 0, 1)">)); 
      System.out.println(</span>"获取hashs中所有的key："+shardedJedis.hkeys("hashs"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println(</span>"获取hashs中所有的value："+shardedJedis.hvals("hashs"<span style="color: rgba(0, 0, 0, 1)">));
      System.out.println();
  }

}

　　（2）测试类

package com.redis;
public class Main {
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">static</span> <span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> main(String[] args) {
    </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> TODO Auto-generated method stub</span>
    <span style="color: rgba(0, 0, 255, 1)">new</span><span style="color: rgba(0, 0, 0, 1)"> RedisClient().show();
}

}

　　（3）结果如图

java加载redis以及基本操作

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java加载redis以及基本操作