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Java操作redis

Redis 作为服务器缓存，用处比较多。本文使用 java 操作 redis，对操作进行简单的封装，并介绍如何将其集成到 spring 中，最后介绍 redis 分页查询。

首先定义操作接口，为 redis 的单机操作和集群操作提供标准。

public interface JedisClient
{
    void set(String key, String value);

String get(String key);

</span><span style="color: rgba(0, 0, 255, 1)">void</span><span style="color: rgba(0, 0, 0, 1)"> hset(String hkey, String key, String value);

String hget(String hkey, String key);

</span><span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> incr(String key);

</span><span style="color: rgba(0, 0, 255, 1)">void</span> expire(String key, <span style="color: rgba(0, 0, 255, 1)">int</span><span style="color: rgba(0, 0, 0, 1)"> seconds);

</span><span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> ttl(String key);

</span><span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> del(String key);

</span><span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> hdel(String hkey, String key);

</span><span style="color: rgba(0, 128, 0, 1)">/**</span><span style="color: rgba(0, 128, 0, 1)">
 * redis list操作
 * 
 * </span><span style="color: rgba(128, 128, 128, 1)">@param</span><span style="color: rgba(0, 128, 0, 1)"> name
 * </span><span style="color: rgba(128, 128, 128, 1)">@param</span><span style="color: rgba(0, 128, 0, 1)"> value
 </span><span style="color: rgba(0, 128, 0, 1)">*/</span>
<span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> rpush(String key, String value);

</span><span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> lpush(String key, String value);

String rpop(String key);

String lpop(String key);

</span><span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> llen(String key);

List</span>&lt;String&gt; lrange(String key, <span style="color: rgba(0, 0, 255, 1)">long</span> start, <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> end);

</span><span style="color: rgba(0, 0, 255, 1)">long</span> zadd(String key, <span style="color: rgba(0, 0, 255, 1)">double</span><span style="color: rgba(0, 0, 0, 1)"> score, String value);

Set</span>&lt;String&gt; zrange(String key, <span style="color: rgba(0, 0, 255, 1)">long</span> start, <span style="color: rgba(0, 0, 255, 1)">long</span> end);<span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">递增</span>


    
    Set<String> zrevrange(String key, long start, long end);//递减
}

定义单机版实现类

public class JedisClientSingle implements JedisClient
{
    // 注意，JedisPool 这个类型已经在 spring 中注册过了。这种方式直根据类型来注入
    @Autowired
    private JedisPool jedisPool;

@Override
</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)"> set(String key, String value)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    jedis.set(key, value);
    jedis.close();
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span><span style="color: rgba(0, 0, 0, 1)"> String get(String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    String value </span>=<span style="color: rgba(0, 0, 0, 1)"> jedis.get(key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> value;
}

@Override
</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)"> hset(String hkey, String key, String value)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    jedis.hset(hkey, key, value);
    jedis.close();
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span><span style="color: rgba(0, 0, 0, 1)"> String hget(String hkey, String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    String value </span>=<span style="color: rgba(0, 0, 0, 1)"> jedis.hget(hkey, key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> value;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> incr(String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    </span><span style="color: rgba(0, 0, 255, 1)">long</span> value =<span style="color: rgba(0, 0, 0, 1)"> jedis.incr(key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> value;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">void</span> expire(String key, <span style="color: rgba(0, 0, 255, 1)">int</span><span style="color: rgba(0, 0, 0, 1)"> seconds)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    jedis.expire(key, seconds);
    jedis.close();
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> ttl(String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    </span><span style="color: rgba(0, 0, 255, 1)">long</span> value =<span style="color: rgba(0, 0, 0, 1)"> jedis.ttl(key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> value;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> del(String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    </span><span style="color: rgba(0, 0, 255, 1)">long</span> result =<span style="color: rgba(0, 0, 0, 1)"> jedis.del(key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> hdel(String hkey, String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    </span><span style="color: rgba(0, 0, 255, 1)">long</span> result =<span style="color: rgba(0, 0, 0, 1)"> jedis.hdel(hkey, key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> rpush(String key, String value)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    </span><span style="color: rgba(0, 0, 255, 1)">long</span> result =<span style="color: rgba(0, 0, 0, 1)"> jedis.rpush(key, value);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> lpush(String key, String value)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    </span><span style="color: rgba(0, 0, 255, 1)">long</span> result =<span style="color: rgba(0, 0, 0, 1)"> jedis.lpush(key, value);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span><span style="color: rgba(0, 0, 0, 1)"> String rpop(String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    String result </span>=<span style="color: rgba(0, 0, 0, 1)"> jedis.rpop(key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span><span style="color: rgba(0, 0, 0, 1)"> String lpop(String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    String result </span>=<span style="color: rgba(0, 0, 0, 1)"> jedis.lpop(key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> llen(String key)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    </span><span style="color: rgba(0, 0, 255, 1)">long</span> result =<span style="color: rgba(0, 0, 0, 1)"> jedis.llen(key);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> List&lt;String&gt; lrange(String key, <span style="color: rgba(0, 0, 255, 1)">long</span> start, <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> end)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    List</span>&lt;String&gt; result =<span style="color: rgba(0, 0, 0, 1)"> jedis.lrange(key, start, end);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> <span style="color: rgba(0, 0, 255, 1)">long</span> zadd(String key, <span style="color: rgba(0, 0, 255, 1)">double</span><span style="color: rgba(0, 0, 0, 1)"> score, String value)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    </span><span style="color: rgba(0, 0, 255, 1)">long</span> result =<span style="color: rgba(0, 0, 0, 1)"> jedis.zadd(key, score, value);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> Set&lt;String&gt; zrange(String key, <span style="color: rgba(0, 0, 255, 1)">long</span> start, <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> end)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    Set</span>&lt;String&gt; result =<span style="color: rgba(0, 0, 0, 1)"> jedis.zrange(key, start, end);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}

@Override
</span><span style="color: rgba(0, 0, 255, 1)">public</span> Set&lt;String&gt; zrevrange(String key, <span style="color: rgba(0, 0, 255, 1)">long</span> start, <span style="color: rgba(0, 0, 255, 1)">long</span><span style="color: rgba(0, 0, 0, 1)"> end)
{
    Jedis jedis </span>=<span style="color: rgba(0, 0, 0, 1)"> jedisPool.getResource();
    Set</span>&lt;String&gt; result =<span style="color: rgba(0, 0, 0, 1)"> jedis.zrevrange(key, start, end);
    jedis.close();
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> result;
}



}

如下是集群操作实现类

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public class JedisClientCluster implements JedisClient
{
    // 注意，jedisCluster这个类型已经在spring中注册过了。这种方式直接根据类型来注入,不需要进行关闭操作
    @Autowired
    private JedisCluster jedisCluster;
 
    @Override
    public void set(String key, String value)
    {
        jedisCluster.set(key, value);
    }
 
    @Override
    public String get(String key)
    {
        return jedisCluster.get(key);
    }
 
    @Override
    public void hset(String hkey, String key, String value)
    {
        jedisCluster.hset(hkey, key, value);
    }
 
    @Override
    public String hget(String hkey, String key)
    {
        return jedisCluster.hget(hkey, key);
    }
 
    @Override
    public long incr(String key)
    {
        return jedisCluster.incr(key);
    }
 
    @Override
    public void expire(String key, int seconds)
    {
        jedisCluster.expire(key, seconds);
    }
 
    @Override
    public long ttl(String key)
    {
        return jedisCluster.ttl(key);
    }
 
    @Override
    public long del(String key)
    {
        return jedisCluster.del(key);
    }
 
    @Override
    public long hdel(String hkey, String key)
    {
        return jedisCluster.hdel(hkey, key);
    }
 
    @Override
    public long rpush(String key, String value)
    {
        return jedisCluster.rpush(key, value);
    }
 
    @Override
    public long lpush(String key, String value)
    {
        return jedisCluster.lpush(key, value);
    }
 
    @Override
    public String rpop(String key)
    {
        return jedisCluster.rpop(key);
    }
 
    @Override
    public String lpop(String key)
    {
        return jedisCluster.lpop(key);
    }
 
    @Override
    public long llen(String key)
    {
        return jedisCluster.llen(key);
    }
 
    @Override
    public List<String> lrange(String key, long start, long end)
    {
        return jedisCluster.lrange(key, start, end);
    }
 
    @Override
    public long zadd(String key, double score, String value)
    {
        return jedisCluster.zadd(key, score, value);
    }
 
    @Override
    public Set<String> zrange(String key, long start, long end)
    {
        return jedisCluster.zrange(key, start, end);
    }
 
    @Override
    public Set<String> zrevrange(String key, long start, long end)
    {
        return jedisCluster.zrange(key, start, end);
    }
 
}

　　

jedis 相关的 bean 在 spring 中的配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <!-- <property name="maxIdle" value="300" /> --> <!-- 最大能够保持 idel 状态的对象数 -->
        <!-- <property name="maxTotal" value="60000" />  --><!-- 最大分配的对象数 -->
        <!-- <property name="testOnBorrow" value="true" /> --> <!-- 当调用 borrow Object 方法时，是否进行有效性检查 -->
    </bean>
    <!-- jedis 客户端单机版，开发的时候，都是用单机版 -->
    <bean id="redisClientSingle" class="redis.clients.jedis.JedisPool">
        <constructor-arg name="poolConfig" ref="jedisPoolConfig" />
        <constructor-arg name="host" value="192.168.1.1"></constructor-arg>
        <constructor-arg name="port" value="6379"></constructor-arg>
        <constructor-arg name="timeout" value="2000" type="int"></constructor-arg>
        <constructor-arg name="password" value="xxx"></constructor-arg>
    </bean>

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">bean </span><span style="color: rgba(255, 0, 0, 1)">id</span><span style="color: rgba(0, 0, 255, 1)">="jedisClientSingle"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="org.redis.impl.JedisClientSingle"</span><span style="color: rgba(0, 0, 255, 1)">&gt;&lt;/</span><span style="color: rgba(128, 0, 0, 1)">bean</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)"> jedis客户端集群版,生产环境使用 </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)"> &lt;bean id="redisClientCluster" class="redis.clients.jedis.JedisCluster"&gt; 
    &lt;constructor-arg name="nodes"&gt; &lt;set&gt; &lt;bean class="redis.clients.jedis.HostAndPort"&gt; 
    &lt;constructor-arg name="host" value="192.168.25.128"&gt;&lt;/constructor-arg&gt; &lt;constructor-arg 
    name="port" value="7001"&gt;&lt;/constructor-arg&gt; &lt;/bean&gt; &lt;bean class="redis.clients.jedis.HostAndPort"&gt; 
    &lt;constructor-arg name="host" value="192.168.25.128"&gt;&lt;/constructor-arg&gt; &lt;constructor-arg 
    name="port" value="7002"&gt;&lt;/constructor-arg&gt; &lt;/bean&gt; &lt;bean class="redis.clients.jedis.HostAndPort"&gt; 
    &lt;constructor-arg name="host" value="192.168.25.128"&gt;&lt;/constructor-arg&gt; &lt;constructor-arg 
    name="port" value="7003"&gt;&lt;/constructor-arg&gt; &lt;/bean&gt; &lt;bean class="redis.clients.jedis.HostAndPort"&gt; 
    &lt;constructor-arg name="host" value="192.168.25.128"&gt;&lt;/constructor-arg&gt; &lt;constructor-arg 
    name="port" value="7004"&gt;&lt;/constructor-arg&gt; &lt;/bean&gt; &lt;bean class="redis.clients.jedis.HostAndPort"&gt; 
    &lt;constructor-arg name="host" value="192.168.25.128"&gt;&lt;/constructor-arg&gt; &lt;constructor-arg 
    name="port" value="7005"&gt;&lt;/constructor-arg&gt; &lt;/bean&gt; &lt;bean class="redis.clients.jedis.HostAndPort"&gt; 
    &lt;constructor-arg name="host" value="192.168.25.128"&gt;&lt;/constructor-arg&gt; &lt;constructor-arg 
    name="port" value="7006"&gt;&lt;/constructor-arg&gt; &lt;/bean&gt; &lt;/set&gt; &lt;/constructor-arg&gt; 
    &lt;constructor-arg name="poolConfig" ref="jedisPoolConfig"&gt;&lt;/constructor-arg&gt; 
    &lt;/bean&gt; &lt;bean id="jedisClientCluster" class="org.redis.impl..JedisClientCluster"&gt;&lt;/bean&gt; </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>



</beans>

 

java 中 redis 分页查询

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package common.model;
 
import java.util.ArrayList;
import java.util.List;
 
public class PageRedis<A>
{
    private int totalNum; // 总行数
    private int totalPage; // 总页数
    private int pageIndex; // 当前页数
    private int pageSize; // 每页几行
 
    private List<A> rows;
 
    public PageRedis()
    {
 
    }
 
    public int getTotalPage()
    {
        return totalPage;
    }
 
    public int getPageIndex()
    {
        return pageIndex;
    }
 
    public void setPageIndex(int pageIndex)
    {
        this.pageIndex = pageIndex;
    }
 
    public int getPageSize()
    {
        return pageSize;
    }
 
    public void setPageSize(int pageSize)
    {
        this.pageSize = pageSize;
    }
 
    public int getTotalNum()
    {
        return totalNum;
    }
 
    public void setTotalNum(int totalNum)
    {
        this.totalNum = totalNum;
    }
 
    // 设置总页数
 
    public List<A> getRows()
    {
        return rows;
    }
 
    public void setRows(List<A> rows)
    {
        this.rows = rows;
    }
 
    public void setTotalPage()
    {
        // 如果总行数整除每页的行数
        if (this.getTotalNum() % this.getPageSize() == 0)
        {
            this.totalPage = this.getTotalNum() / this.getPageSize();
        }
        else
        {
            this.totalPage = this.getTotalNum() / this.getPageSize() + 1;
        }
    }
 
    public <T> List<T> getPage(List<T> list)
    {
        List<T> sub = new ArrayList<T>();
 
        // 当前页的起始记录（非最后一页）
        int start = (this.getPageIndex() - 1) * this.getPageSize();
 
        // 当前页的截止记录（非最后一页）
        int end = this.getPageIndex() * this.getPageSize();
 
        // 最后一页
        int endOfLast = (this.getPageIndex() - 1) * this.getPageSize() + this.getTotalNum() % this.getPageSize();
 
        // 如果说，当前页数等于总页数 并且 总行数除以每页几行不能整除
        if (this.getPageIndex() == this.getTotalPage() && this.getTotalNum() % this.getPageSize() != 0)
        {
            for (int i = start; i < endOfLast; i++)
            {
                if (i < list.size())
                {
                    sub.add(list.get(i));
                }
            }
        }
        else
        {
            for (int i = start; i < end; i++)
            {
                if (i < list.size())
                {
                    sub.add(list.get(i));
                }
            }
        }
 
        return sub;
    }
 
    public static void main(String[] args)
    {
        /*List<Integer> list = new LinkedList<Integer>();
        list.add(1);
        list.add(2);
        list.add(3);
        list.add(4);
        list.add(5);
 
        PageRedis page = new PageRedis();
        page.setTotalNum(list.size());
        page.setPageSize(4);
        page.setPageIndex(3);
        page.setTotalPage();
        List<Integer> sub = page.getPage(list);
        System.out.println(sub);*/
 
    }
}

　　

 

注意，上文中有几点是个人认为比较麻烦的

1.spring 集成含密码的 redis

2. 利用 redis 的 list 和 sortset 实现分页查询

有问题欢迎讨论