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java-redis初探

一、Redis 简介

　　Redis 是完全开源免费的，遵守 BSD 协议，是一个高性能的 key-value 数据库。

　　Redis 与其他 key - value 缓存产品有以下三个特点：

    • Redis 支持数据的持久化，可以将内存中的数据保存在磁盘中，重启的时候可以再次加载进行使用。
    • Redis 不仅仅支持简单的 key-value 类型的数据，同时还提供 list，set，zset，hash 等数据结构的存储。
    • Redis 支持数据的备份，即 master-slave 模式的数据备份

二、Redis 服务安装

　　请从https://github.com/MicrosoftArchive/redis/releases 这里下载最新版本的 redis 服务安装包，在 windows 下开发，建议安装成自启动服务方便管理。

　　

　　

三、为自己的 java 项目添加 redis 依赖包 (maven)

　　我这里使用的是 jedis-2.9.0.jar，该 jar 包自动引入连接池管理包 commons-pool2-2.4.2.jar。

<dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.9.0</version>
    </dependency>

 　　

四、基于 jedis 创建 redis 连接池 (单机版 & 分布式)

public class RedisClient {
    private static JedisPool jedisPool;// 非切片连接池
    private static ShardedJedisPool shardedJedisPool;// 切片连接池
    static {initialPool();
        initialShardedPool();}

</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)">static</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>
    jedisPool = <span style="color: rgba(0, 0, 255, 1)">new</span> JedisPool(getConfig(), "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)">static</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)"> 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, "master"<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)">远程连接</span>
    shards.add(<span style="color: rgba(0, 0, 255, 1)">new</span> JedisShardInfo("192.168.0.122", 6379, "news"<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(getConfig(), shards);
}
</span><span style="color: rgba(0, 128, 0, 1)">/**</span><span style="color: rgba(0, 128, 0, 1)">
 * 获取基础配置
 * </span><span style="color: rgba(128, 128, 128, 1)">@return</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)">static</span><span style="color: rgba(0, 0, 0, 1)"> JedisPoolConfig getConfig(){
    </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.setMaxTotal(</span>20<span style="color: rgba(0, 0, 0, 1)">);
    config.setMaxIdle(</span>5<span style="color: rgba(0, 0, 0, 1)">);
    config.setMaxWaitMillis(</span>20*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, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> config;
}</span></pre>

 

  1. initialPool：创建一个单机版的连接池。如果缓存数据量过大，单机内存有可能不够用。
  2. initialShardedPool：创建一个分布式的连接池。可以配置多台机器的 redis 服务，存储由组件自动选择。分布式存储的实现可以简单了解一下源码结构，参考：https://www.cnblogs.com/vhua/p/redis_2.html
  3. getConfig：设置个性化配置项
    • MaxTotal：允许的最大连接数，超过后返回 null。这里 get 到了 java 的一个技能点，小分享 AtomicLong（线程安全的计数器）, 在多线程环境下可以正常计数，incrementAndGet：加 1，decrementAndGet：减 1;

　　　　　　

　　　　　　

    • MaxIdle：允许的最大空闲连接数，超过后连接会被回收；
    • MaxWaitMillis：一次连接的超时时限；

 

五、基于 jedis 对 redis 数据库的基本操作

　　参考博文：https://www.cnblogs.com/edisonfeng/p/3571870.html

private Jedis jedis;// 非切片额客户端连接
    private ShardedJedis shardedJedis;// 切片额客户端连接

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

</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();
    </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 关闭连接池</span>



        jedis.close();
shardedJedis.close();
// jedisPool.returnResource(jedis);
// shardedJedisPool.returnResource(shardedJedis);
    }


</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)"> 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)">private</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", "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：" + jedis.mget("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：" + jedis.mget("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)">private</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)">private</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>"sets2中添加元素element002：" + jedis.sadd("sets2", "element002"<span style="color: rgba(0, 0, 0, 1)">));
    System.out.println(</span>"sets2中添加元素element003：" + jedis.sadd("sets2", "element003"<span style="color: rgba(0, 0, 0, 1)">));
    System.out.println(</span>"sets2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)">private</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)">private</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();
}</span></pre>
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