Java Spring mvc 操做 Redis 及 Redis 集羣

時間 2019-11-19

標籤 java spring mvc redis 集羣欄目 Java 简体版

原文原文鏈接

本文原創，轉載請註明：http://www.cnblogs.com/fengzheng/p/5941953.htmlhtml

關於 Redis 集羣搭建能夠參考個人另外一篇文章 Redis集羣搭建與簡單使用前端

Redis 是什麼，能作什麼java

Redis 是一個開源（BSD許可），內存存儲的數據結構服務器，可用做數據庫，高速緩存和消息隊列代理。它支持字符串、哈希表、列表、集合、有序集合，位圖，hyperloglogs等數據類型。內置複製、Lua腳本、LRU收回、事務以及不一樣級別磁盤持久化功能，同時經過Redis Sentinel 提供高可用，經過 Redis Cluster 提供自動分區。(摘自 Redis 官網)git

做爲內存數據庫，在現代互聯網 web 系統中，仍是主要將 Redis 做爲緩存使用。大型互聯網 Web 系統對性能要求很高，而在前端和數據層之間增長數據緩存已成爲必不可少的手段之一，當前比較流行的兩個技術就是 Redis 和 Memcached，至於二者有什麼區別，不是本文要說的內容。本文主要講 Java web 如何操做 Redis 及 Redis 集羣。github

通常 Java 程序操做Redisweb

Redis 提供了多種語言的客戶端，在 Java 中最流行的是 Jedis 。訪問可查看源碼及使用方式。目前 Jedis 最新版本是2.9.0。不管是單機仍是集羣，Jedis 都有很詳細的說明和實例代碼，這裏只作簡單說明。若是用 Maven 作包管理，須要引用 jedis 包，本例使用最新的2.9.0版本，以下：redis

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

操做 Redis 單機spring

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

/**
 * Created by fengdezitai on 2016/10/9.
 */
public class JedisClient {

    private static final String host= "192.168.31.121";

    private static final JedisClient jedisClient = new JedisClient();

    private Jedis jedis = null;
    /**
     * 私有構造函數
     */
    private JedisClient(){}

    public static JedisClient getInstance(){
        return jedisClient;
    }

    private JedisPoolConfig getPoolConfig(){
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        jedisPoolConfig.setMaxIdle(10);
        jedisPoolConfig.setMaxTotal(100);
        jedisPoolConfig.setMaxWaitMillis(3000);
        return jedisPoolConfig;
    }

    /**
     * 添加
     * @param key
     * @param value
     * @return
     * @throws Exception
     */
    public Boolean add(String key,String value) throws Exception{
        JedisPool pool = new JedisPool(getPoolConfig(),host);
        Jedis jedis = null;
        try {
            jedis = pool.getResource();
            if(jedis.exists(key)){
                throw new Exception(String.format("key (%s) 已存在 ",key));
            }
            jedis.set(key,value);

        }catch (Exception e){
            throw e;
        }
        finally {
            if(jedis!=null){
                jedis.close();
            }
        }
        pool.destroy();
        return true;
    }

    /**
     * 獲取值
     * @param key
     * @return
     * @throws Exception
     */
    public String get(String key) throws Exception{
        JedisPool pool = new JedisPool(getPoolConfig(),host);
        Jedis jedis = null;
        String result = "";
        try {
            jedis = pool.getResource();
            result = jedis.get(key);
        }catch (Exception e){
            throw e;
        }
        finally {
            if(jedis!=null){
                jedis.close();
            }
        }
        pool.destroy();
        return result;
    }

    public static void main(String[] args) {
        JedisClient jedisClient = JedisClient.getInstance();
        try {
            /*Boolean result = jedisClient.add("hello", "redis1");
            if(result){
                System.out.println("success");
            }*/

            System.out.println(jedisClient.get("hello"));
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

操做 redis 集羣數據庫

import redis.clients.jedis.*;
import java.util.HashSet;
import java.util.Set;

/**
 * Created by fengdezitai on 2016/10/13.
 */
public class JedisClusterClient {

    private static int count = 0;

    private static final JedisClusterClient redisClusterClient = new JedisClusterClient();

    /**
     * 私有構造函數
     */
    private JedisClusterClient() {}

    public static JedisClusterClient getInstance() {
        return redisClusterClient;
    }

    private JedisPoolConfig getPoolConfig(){
        JedisPoolConfig config = new JedisPoolConfig();
        config.setMaxTotal(1000);
        config.setMaxIdle(100);
        config.setTestOnBorrow(true);
        return config;
    }

    public void SaveRedisCluster() {
        Set<HostAndPort> jedisClusterNodes = new HashSet<HostAndPort>();
        jedisClusterNodes.add(new HostAndPort("192.168.31.245", 7000));
        jedisClusterNodes.add(new HostAndPort("192.168.31.245", 7001));
        jedisClusterNodes.add(new HostAndPort("192.168.31.245", 7002));
        jedisClusterNodes.add(new HostAndPort("192.168.31.210", 7003));
        jedisClusterNodes.add(new HostAndPort("192.168.31.210", 7004));
        jedisClusterNodes.add(new HostAndPort("192.168.31.210", 7005));

        JedisCluster jc = new JedisCluster(jedisClusterNodes,getPoolConfig());
        jc.set("cluster", "this is a redis cluster");
        String result = jc.get("cluster");
        System.out.println(result);
    }

    public static void main(String[] args) {
        JedisClusterClient jedisClusterClient = JedisClusterClient.getInstance();
        jedisClusterClient.SaveRedisCluster();
    }
}

Spring mvc 操做 Redisapache

在 Spring mvc 中操做 Redis ，首先固然要搭好 Spring mvc 框架了。如下是在假設 Spring mvc 環境已經架好的狀況下。本例中 Spring 版本爲 4.3.2 RELEASE。關於 Spring 的 maven 引用以下：

<!-- spring版本號 -->
<spring.version>4.3.2.RELEASE</spring.version>

<!-- spring核心包 -->
    <!-- springframe start -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- springframe end -->

操做 Redis 單機

只用 Jedis 本身實現注入（區別於下面的引用spring-data-redis）

把前面的 JedisClient 代碼拿過來引用便可，只需實現一個訪問 Redis 的 Service ，就能夠集成到 Spring mvc 。Service 代碼以下：

import org.springframework.stereotype.Service;
import util.JedisClient;

/**
 * Created by fengdezitai on 2016/10/9.
 */
@Service
public class RedisService {

    public String get(String key) throws Exception{
        JedisClient jedisClient = JedisClient.getInstance(); //上面實現的JedisClient
        String result = "";
        try {
            result = jedisClient.get("hello");
        }catch (Exception e){
            throw e;
        }
        return result;
    }
}

Controller 實現以下：

@Controller
@RequestMapping(value = "redisAllInOne")
public class RedisAllInOneController {

    @Autowired
    private RedisService redisService;

    @RequestMapping(value = "get",method = RequestMethod.GET)
    @ResponseBody
    public Object getByMyService(String key){
        try {
            String result = redisService.get(key);
            return result;
        }catch (Exception e){
            e.printStackTrace();
        }
        return null;
    }
}

用 spring-data-redis 包作集成

上面是本身實現的注入，這裏用 spring-data-redis 進行集成，只需簡單配置便可，須要引用 maven 包以下，版本爲目前最新版 1.7.2.RELEASE：

<dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-redis</artifactId>
      <version>1.7.2.RELEASE</version>
    </dependency>

使用 spring-data-redis ，即省去了本身實現注入的過程，經過它提供的一些配置，便可實現鏈接池配置、RedisTemplate 配置、JedisConnectionFactory 配置；經過 JedisConnectionFactory 可配置鏈接池參數、redis 服務器、端口、密碼、超時時間、database索引等；RedisTemplate 即注入的bean ，可使用 RedisTemplate 自動注入的實體進行 redis 的一系列操做，具體看配置；

redis 服務屬性配置文件：

redis.maxIdle=300
redis.maxWait=3000
redis.testOnBorrow=true
redis.host=192.168.31.121
redis.port=6379
redis.password=password
redis.timeout=3000

spring-data-redis xml 配置文件 redis-context.xml：

<!-- jedis 鏈接池 配置 -->
    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig" >
        <property name="maxIdle" value="${redis.maxIdle}" />
        <property name="maxWaitMillis" value="${redis.maxWait}" />
        <property name="testOnBorrow" value="${redis.testOnBorrow}" />
    </bean>
    <!-- redis服務器中心 -->
    <bean id="connectionFactory"  class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" >
        <property name="poolConfig" ref="poolConfig" />
        <property name="port" value="${redis.port}" />
        <property name="hostName" value="${redis.host}" />
        <!--<property name="password" value="${redis.password}" />-->
        <property name="timeout" value="${redis.timeout}" ></property>
        <property name="database" value="1"></property>
    </bean>

    <bean id="commonRedisTemplate" class="org.springframework.data.redis.core.RedisTemplate" >
        <property name="connectionFactory" ref="connectionFactory" />
        <property name="keySerializer" ref="stringRedisSerializer" />
        <property name="hashKeySerializer" ref="stringRedisSerializer" />
        <property name="valueSerializer" ref="stringRedisSerializer" />
        <property name="hashValueSerializer" ref="stringRedisSerializer" />
    </bean>

    <bean id="connectionFactory1"  class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" >
        <property name="poolConfig" ref="poolConfig" />
        <property name="port" value="${redis.port}" />
        <property name="hostName" value="${redis.host}" />
        <!--<property name="password" value="${redis.password}" />-->
        <property name="timeout" value="${redis.timeout}" ></property>
        <property name="database" value="2"></property>
    </bean>

    <bean id="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer" />
    <bean id="cacheRedisTemplate" class="org.springframework.data.redis.core.RedisTemplate" >
        <property name="connectionFactory" ref="connectionFactory1" />
        <property name="keySerializer" ref="stringRedisSerializer" />
        <property name="hashKeySerializer" ref="stringRedisSerializer" />
        <property name="valueSerializer" ref="stringRedisSerializer" />
        <property name="hashValueSerializer" ref="stringRedisSerializer" />
    </bean>

以後在 spring 配置文件中引用以上文件：

<import resource="redis-context.xml" />

解釋一下上面的配置：

poolConfig 即配置 redis 鏈接池，以後配置了兩個 JedisConnectionFactory 和 RedisTemplate ，一個 RedisTemplate 對應一個 JedisConnectionFactory ，這樣能夠配置根據場景配置不一樣的 Redis 鏈接，好比超時時間要求不一致、database 0-15 能夠存儲不一樣的數據等。這裏就配置了database 1 和 2 ，調用 commonRedisTemplate 會存到 database1 ，調用 cacheRedisTemplate 會存到 database2。

以後在 Service 層便可注入並引用這兩個 RedisTemplate ，以下代碼：

import org.apache.commons.lang3.StringUtils;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Repository;

import javax.annotation.Resource;
import java.io.*;

@Repository
public class RedisCache {
　　
    @Resource(name = "cacheRedisTemplate")
    private RedisTemplate<String, String> cacheRedisTemplate;

    public void put(Object key, Object value) {
        if(null == value) {
            return;
        }

        if(value instanceof String) {
            if(StringUtils.isEmpty(value.toString())) {
                return;
            }
        }

        // TODO Auto-generated method stub
        final String keyf = key + "";
        final Object valuef = value;
        final long liveTime = 86400;

        cacheRedisTemplate.execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection)
                    throws DataAccessException {
                byte[] keyb = keyf.getBytes();
                byte[] valueb = toByteArray(valuef);
                connection.set(keyb, valueb);
                if (liveTime > 0) {
                    connection.expire(keyb, liveTime);
                }
                return 1L;
            }
        });
    }

    public Object get(Object key) {
        final String keyf = (String) key;
        Object object;
        object = cacheRedisTemplate.execute(new RedisCallback<Object>() {
            public Object doInRedis(RedisConnection connection)
                    throws DataAccessException {

                byte[] key = keyf.getBytes();
                byte[] value = connection.get(key);
                if (value == null) {
                    return null;
                }
                return toObject(value);

            }
        });

        return object;
    }

    /**
     * 描述 : <byte[]轉Object>. <br>
     * <p>
     * <使用方法說明>
     * </p>
     *
     * @param bytes
     * @return
     */
    private Object toObject(byte[] bytes) {
        Object obj = null;
        try {
            ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
            ObjectInputStream ois = new ObjectInputStream(bis);
            obj = ois.readObject();
            ois.close();
            bis.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        return obj;
    }

    private byte[] toByteArray(Object obj) {
        byte[] bytes = null;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try {
            ObjectOutputStream oos = new ObjectOutputStream(bos);
            oos.writeObject(obj);
            oos.flush();
            bytes = bos.toByteArray();
            oos.close();
            bos.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return bytes;
    }
}

最後在 Controller 中調用便可

    @Autowired
    private RedisCache redisCache;


    @RequestMapping(value = "get", method = RequestMethod.GET)
    @ResponseBody
    public Object getByMyService(String key) {
        try {
            String result = redisService.get(key);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @RequestMapping(value = "save", method = RequestMethod.GET)
    @ResponseBody
    public Object save() {
        Token token = new Token();
        token.setAccess_token("token");
        token.setExpires_in(1000);
        try {
            redisCache.put("token", token);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "ok";
    }

操做 Redis 集羣

只用 Jedis 本身實現注入（區別於下面的引用spring-data-redis）

把前面的 JedisClusterClient 代碼拿過來引用便可，只需實現一個訪問 Redis 的 Service ，就能夠集成到 Spring mvc 。Service 代碼以下：

import org.springframework.stereotype.Service;
import util.JedisClusterClient;

/**
 * Created by fengdezitai on 2016/10/13.
 */
@Service
public class RedisClusterService {

    public void save() throws Exception{
        //調用 JedisClusterClient 中的方法
        JedisClusterClient jedisClusterClient = JedisClusterClient.getInstance();
        try {
            jedisClusterClient.SaveRedisCluster();
        }catch (Exception e){
            throw e;
        }
    }
}

最後在 Controller 中調用實現的 Service 便可

@Controller
@RequestMapping(value = "redisCluster")
public class RedisClusterController {

    @Autowired
    private RedisClusterService redisClusterService;

    @RequestMapping(value = "save",method = RequestMethod.GET)
    @ResponseBody
    public Object save(){
        try{
            redisClusterService.save();
        }catch (Exception e){
            e.printStackTrace();
            return String.format("error: %s",e.getMessage());
        }
        return "ok";
    }
}

用 spring-data-redis 包作集成

Spring 和 spring-data-redis maven 包引用和前面一致，之因此引用 spring-data-redis 1.7.2.RELEASE，是由於目前只有這個最新版本才支持集羣操做。

redis 集羣服務屬性配置

redis.maxIdle=300
redis.maxWait=3000
redis.testOnBorrow=false
redis.timeout=3000

spring-data-redis xml 集羣配置文件 redis-cluster-context.xml

<!-- 鏈接池 配置 -->
    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig" >
        <property name="maxIdle" value="${redis.maxIdle}" />
        <property name="maxWaitMillis" value="${redis.maxWait}" />
        <property name="testOnBorrow" value="${redis.testOnBorrow}" />
    </bean>


    <bean id="redisClusterConfig" class="org.springframework.data.redis.connection.RedisClusterConfiguration">
        <property name="maxRedirects" value="3"></property>
        <property name="clusterNodes">
            <set>
                <bean class="org.springframework.data.redis.connection.RedisNode">
                    <constructor-arg name="host" value="192.168.31.245"></constructor-arg>
                    <constructor-arg name="port" value="7000"></constructor-arg>
                </bean>
                <bean class="org.springframework.data.redis.connection.RedisNode">
                    <constructor-arg name="host" value="192.168.31.245"></constructor-arg>
                    <constructor-arg name="port" value="7001"></constructor-arg>
                </bean>
                <bean class="org.springframework.data.redis.connection.RedisNode">
                    <constructor-arg name="host" value="192.168.31.245"></constructor-arg>
                    <constructor-arg name="port" value="7002"></constructor-arg>
                </bean>
                 <bean class="org.springframework.data.redis.connection.RedisNode">
                    <constructor-arg name="host" value="192.168.31.210"></constructor-arg>
                    <constructor-arg name="port" value="7003"></constructor-arg>
                </bean>
                <bean class="org.springframework.data.redis.connection.RedisNode">
                    <constructor-arg name="host" value="192.168.31.210"></constructor-arg>
                    <constructor-arg name="port" value="7004"></constructor-arg>
                </bean>
                <bean class="org.springframework.data.redis.connection.RedisNode">
                    <constructor-arg name="host" value="192.168.31.210"></constructor-arg>
                    <constructor-arg name="port" value="7005"></constructor-arg>
                </bean>
            </set>
        </property>
    </bean>

    <bean id="redis4CacheConnectionFactory"
          class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
        <constructor-arg name="clusterConfig" ref="redisClusterConfig" />
        <property name="timeout" value="${redis.timeout}" />
        <property name="poolConfig" ref="poolConfig"/>
    </bean>


    <bean name="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer" />
    <bean id="clusterRedisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
        <property name="connectionFactory" ref="redis4CacheConnectionFactory" />
        <property name="keySerializer" ref="stringRedisSerializer" />
        <property name="hashKeySerializer" ref="stringRedisSerializer" />
        <property name="valueSerializer" ref="stringRedisSerializer" />
        <property name="hashValueSerializer" ref="stringRedisSerializer" />
    </bean>

以後在 Spring 配置文件中引用

<import resource="redis-cluster-context.xml" />

解釋以上配置：

poolConfig是鏈接池配置，redisClusterConfig 配置了 Redis 集羣的各個節點（節點 host 和 port 最好寫在屬性配置文件中），集羣搭建可見個人另外一篇博客。而後下面和單機配置同樣了，一對 JedisConnectionFactory 和 RedisTemplate 。

以後在 Service 層便可注入並引用這個 RedisTemplate，代碼以下：

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Repository;

import java.io.*;

/**
 * Created by fengdezitai on 2016/9/29.
 */
@Repository
public class RedisClusterCache {

    @Autowired
    private RedisTemplate clusterRedisTemplate;


    public void put(Object key, Object value) {
        if(null == value) {
            return;
        }

        if(value instanceof String) {
            if(StringUtils.isEmpty(value.toString())) {
                return;
            }
        }

        // TODO Auto-generated method stub
        final String keyf = key + "";
        final Object valuef = value;
        final long liveTime = 86400;

        clusterRedisTemplate.execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection)
                    throws DataAccessException {
                byte[] keyb = keyf.getBytes();
                byte[] valueb = toByteArray(valuef);
                connection.set(keyb, valueb);
                if (liveTime > 0) {
                    connection.expire(keyb, liveTime);
                }
                return 1L;
            }
        });
    }

    public Object get(Object key) {
        final String keyf = (String) key;
        Object object;
        object = clusterRedisTemplate.execute(new RedisCallback<Object>() {
            public Object doInRedis(RedisConnection connection)
                    throws DataAccessException {

                byte[] key = keyf.getBytes();
                byte[] value = connection.get(key);
                if (value == null) {
                    return null;
                }
                return toObject(value);

            }
        });

        return object;
    }

    /**
     * 描述 : <byte[]轉Object>. <br>
     * <p>
     * <使用方法說明>
     * </p>
     *
     * @param bytes
     * @return
     */
    private Object toObject(byte[] bytes) {
        Object obj = null;
        try {
            ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
            ObjectInputStream ois = new ObjectInputStream(bis);
            obj = ois.readObject();
            ois.close();
            bis.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        return obj;
    }

    private byte[] toByteArray(Object obj) {
        byte[] bytes = null;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try {
            ObjectOutputStream oos = new ObjectOutputStream(bos);
            oos.writeObject(obj);
            oos.flush();
            bytes = bos.toByteArray();
            oos.close();
            bos.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return bytes;
    }
}

最後在 Controller 中調用便可

@Controller
@RequestMapping(value = "redisCluster")
public class RedisClusterController {

    @Autowired
    private RedisClusterCache redisClusterCache;

    @RequestMapping(value = "clusterSave",method = {RequestMethod.GET,RequestMethod.POST})
    @ResponseBody
    public Object clusterSave(){
        //redisClusterCache.put("cluster","save cluster");
        Token token = new Token();
        token.setExpires_in(1000);
        token.setAccess_token("hello world");
        redisClusterCache.put("token",token);
        return "ok";
    }

    @RequestMapping(value = "getKey",method = RequestMethod.GET)
    @ResponseBody
    public Object getCluster(String key){
        Object val = redisClusterCache.get(key);
        return val;
    }
}

注意事項：

版本問題，若是用 spring-data-redis 作集成操做 Reids 集羣，只有 spring-data-redis 目前最新版本1.7才包含對集羣的操做，而最新的 spring-data-redis 中的某些功能對 Spring mvc 的版本也有些限制，因此儘可能選擇高版本的 Spring mvc 對應。
若是存儲的value值是一個實體對象，那麼必定要實現 Serializable 接口