新增快取在view層和service層均可，建議在service層使用。在工作中，一般開放連線單機版，在上線時才真正連線叢集，為此我們也呈現兩種方式。但，無論哪種方式，都一樣，只不過xml配置不一樣；建立一個interface：

public interface IRedis {
	String set(String key,String value);
	String get(String key);
	Boolean exists(String key);
	Long expire(String key,int seconds);
	Long ttl(String key);
	Long incr(String key);
	String hget(String key,String field);
	Long hset(String key, String field, String value);
	Long hdel(String key,String... field);
	Boolean hexistes(String key,String field);
	List<String> hvals(String key);
	Long del(String key);

}
 

一、連線單機版：1、建立class，整合上面的介面：
package com.aynu.redis.imp; import java.util.List; import com.aynu.redis.IRedis; import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisPool; public class Redis implements IRedis { //jedis連線池檔案 private JedisPool jedispool; public JedisPool getJedispool() { return jedispool; } public void setJedispool(JedisPool jedispool) { this.jedispool = jedispool; } @Override public String set(String key, String value) { // TODO Auto-generated method stub //從連線池中獲得一個連線 Jedis jedis=jedispool.getResource(); //直接操作redis String result = jedis.set(key, value); //關閉該連線 jedis.close(); return result; } @Override public String get(String key) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); String result = jedis.get(key); jedis.close(); return result; } @Override public Boolean exists(String key) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); Boolean result = jedis.exists(key); jedis.close(); return result; } @Override public Long expire(String key, int seconds) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); Long result = jedis.expire(key, seconds); jedis.close(); return result; } @Override public Long ttl(String key) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); Long result = jedis.ttl(key); return result; } @Override public Long incr(String key) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); Long result = jedis.incr(key); jedis.close(); return result; } @Override public String hget(String key, String field) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); String result = jedis.hget(key, field); jedis.close(); return result; } @Override public Long hdel(String key, String... field) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); Long result = jedis.hdel(key, field); jedis.close(); return result; } @Override public Boolean hexistes(String key, String field) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); Boolean result = jedis.hexists(key, field); jedis.close(); return result; } @Override public List<String> hvals(String key) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); List<String> result = jedis.hvals(key); jedis.close(); return result; } @Override public Long del(String key) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); Long result = jedis.del(key); jedis.close(); return result; } @Override public Long hset(String key, String field, String value) { // TODO Auto-generated method stub Jedis jedis=jedispool.getResource(); Long result = jedis.hset(key, field, value); jedis.close(); return result; } } 2、建立一個spring-redis.xml檔案，進行配置：

 <bean id="redis" class="com.aynu.redis.imp.Redis">
        <property name="jedispool" ref="jedispool"/>
       </bean>
       
       <bean id="jedispool" class="redis.clients.jedis.JedisPool">
        <constructor-arg name="host" value="192.168.146.128"/>
        <constructor-arg name="port" value="6379"/>
       </bean>

3、在service層使用：策略：查詢時，先從redis中查，如果有，直接返回，沒有從資料庫中查，將查到的結果放到redis中
在查詢快取時，和新增快取時為了防止沒有查到報異常而影響整個系統的執行，我們採用try,catch方式進行捕獲；（1），注入上面的介面：

@Autowired
	private IRedis redis;
	
	
	public IRedis getRedis() {
		return redis;
	}

	public void setRedis(IRedis redis) {
		this.redis = redis;
	}

（2）、去快取中查詢：try { //去快取中查，得到的是個json型別資料 String json = redis.hget("customer", "pageStartIndex"); //判斷是否為空，不為空將json轉為list if(! json.isEmpty()) { List<Customer> list=new ArrayList<Customer>(); list=JSONObject.parseArray(json, Customer.class); } return list; }catch (Exception e) { // TODO: handle exception }（3），如果快取中沒有，從資料庫中查，將結果放入：

redis.hset("customer", "pageStartIndex", customerdata);
		redis.hset("customer", "pageStartIndex", customerdata);
		redis.hset("customer", "pageStartIndex", customerdata);

二、連線叢集：1、建立class，繼承介面：

package com.aynu.redis.imp;

import java.util.List;

import com.aynu.redis.IRedis;

import redis.clients.jedis.HostAndPort;
import redis.clients.jedis.JedisCluster;

public class Cluster implements IRedis {

   private JedisCluster jedisCluster;
	

	public JedisCluster getJedisCluster() {
		return jedisCluster;
	}

	public void setJedisCluster(JedisCluster jedisCluster) {
		this.jedisCluster = jedisCluster;
	}

	@Override
	public String set(String key, String value) {
		// TODO Auto-generated method stub
		return jedisCluster.set(key, value);
	}

	@Override
	public String get(String key) {
		// TODO Auto-generated method stub
		return jedisCluster.get(key);
	}

	@Override
	public Boolean exists(String key) {
		// TODO Auto-generated method stub
		return jedisCluster.exists(key);
	}

	@Override
	public Long expire(String key, int seconds) {
		// TODO Auto-generated method stub
		return jedisCluster.expire(key, seconds);
	}

	@Override
	public Long ttl(String key) {
		// TODO Auto-generated method stub
		return jedisCluster.ttl(key);
	}

	@Override
	public Long incr(String key) {
		// TODO Auto-generated method stub
		return jedisCluster.incr(key);
	}

	@Override
	public String hget(String key, String field) {
		// TODO Auto-generated method stub
		return jedisCluster.hget(key, field);
	}

	@Override
	public Long hset(String key, String field, String value) {
		// TODO Auto-generated method stub
		return jedisCluster.hset(key, field, value);
	}

	@Override
	public Long hdel(String key, String... field) {
		// TODO Auto-generated method stub
		return jedisCluster.hdel(key, field);
	}

	@Override
	public Boolean hexistes(String key, String field) {
		// TODO Auto-generated method stub
		return jedisCluster.hexists(key, field);
	}

	@Override
	public List<String> hvals(String key) {
		// TODO Auto-generated method stub
		return jedisCluster.hvals(key);
	}

	@Override
	public Long del(String key) {
		// TODO Auto-generated method stub
		return jedisCluster.del(key);
	}

}

2、在spring-redis.xml檔案中進行配置：

<bean id="cluster" class="com.aynu.redis.imp.Cluster">
        <property name="JedisCluster" ref="jedisCluster"/>
       </bean>
       <bean id="jedisCluster" class="redis.clients.jedis.JedisCluster">
        <constructor-arg name="nodes">
         <set>
          <bean class="redis.clients.jedis.HostAndPort">
           <constructor-arg name="host" value="192.168.146.130"/>
           <constructor-arg name="port" value="7001"/>
           </bean>
            <bean class="redis.clients.jedis.HostAndPort">
           <constructor-arg name="host" value="192.168.146.130"/>
           <constructor-arg name="port" value="7002"/>
           </bean>
            <bean class="redis.clients.jedis.HostAndPort">
           <constructor-arg name="host" value="192.168.146.130"/>
           <constructor-arg name="port" value="7003"/>
           </bean>
            <bean class="redis.clients.jedis.HostAndPort">
           <constructor-arg name="host" value="192.168.146.130"/>
           <constructor-arg name="port" value="7004"/>
           </bean>
            <bean class="redis.clients.jedis.HostAndPort">
           <constructor-arg name="host" value="192.168.146.130"/>
           <constructor-arg name="port" value="7005"/>
           </bean>
            <bean class="redis.clients.jedis.HostAndPort">
           <constructor-arg name="host" value="192.168.146.130"/>
           <constructor-arg name="port" value="7006"/>
           </bean>
          
         </set>
        </constructor-arg>
       </bean>

3、使用同單機版注意：單機版和叢集版的切換，只在xml的配置進行即可。