redis大家都耳熟能詳了，spring context默認沒有實現redis的cache相關接口，我們需要自己實現，並借助org.springframework.cache.support.SimpleCacheManager進行redis緩存管理。
添加jar包：
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.5.2</version>
</dependency>cache接口實現：
package org.springframework.cache.demo.redis;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import org.springframework.cache.Cache;
import org.springframework.cache.support.SimpleValueWrapper;
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;
public class RedisCache implements Cache {
private RedisTemplate<String, Object> redisTemplate;
private String name;
public RedisTemplate<String, Object> getRedisTemplate() {
return redisTemplate;
}
public void setRedisTemplate(RedisTemplate<String, Object> redisTemplate) {
this.redisTemplate = redisTemplate;
}
public void setName(String name) {
this.name = name;
}
@Override
public String getName() {
return this.name;
}
@Override
public Object getNativeCache() {
return this.redisTemplate;
}
@Override
public ValueWrapper get(Object key) {
final String keyf = (String) key;
Object object = null;
object = redisTemplate.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 != null ? new SimpleValueWrapper(object) : null);
}
@Override
public void put(Object key, Object value) {
final String keyf = (String) key;
final Object valuef = value;
final long liveTime = 86400;
redisTemplate.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;
}
});
}
/**
* 描述 : <Object轉byte[]>. <br>
* <p>
* <使用方法說明>
* </p>
*
* @param obj
* @return
*/
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;
}
/**
* 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;
}
@Override
public void evict(Object key) {
final String keyf = (String) key;
redisTemplate.execute(new RedisCallback<Long>() {
public Long doInRedis(RedisConnection connection) throws DataAccessException {
return connection.del(keyf.getBytes());
}
});
}
@Override
public void clear() {
redisTemplate.execute(new RedisCallback<String>() {
public String doInRedis(RedisConnection connection) throws DataAccessException {
connection.flushDb();
return "ok";
}
});
}
@SuppressWarnings("unchecked")
@Override
public <T> T get(Object key, Class<T> type) {
final String keyf = (String) key;
Object object = null;
object = redisTemplate.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 (T) object;
}
@Override
public ValueWrapper putIfAbsent(Object key, Object value) {
put(key, value);
return new SimpleValueWrapper(value);
}
}
spring配置：
<?xml version='1.0' encoding='UTF-8'?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache.xsd">
<!-- 啟用緩存注解功能，這個是必須的，否則注解不會生效，另外，該注解一定要聲明在spring主配置文件中才會生效 -->
<cache:annotation-driven cache-manager="cacheManager"/>
<bean id="userService" class="org.springframework.cache.demo.UserService" />
<!-- spring自己的換管理器，這裡定義了兩個緩存位置名稱 ，既注解中的value -->
<bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
<property name="caches">
<set>
<bean class="org.springframework.cache.demo.redis.RedisCache">
<property name="redisTemplate" ref="redisTemplate" />
<property name="name" value="userCache"/>
</bean>
</set>
</property>
</bean>
<!-- redis 相關配置 -->
<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxIdle" value="300" />
<property name="maxWaitMillis" value="3000" />
<property name="testOnBorrow" value="true" />
</bean>
<bean id="connectionFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:host-name="192.168.1.90" p:port="6379" p:pool-config-ref="poolConfig"
p:database="0" />
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="connectionFactory" />
</bean>
</beans>
除了以上方式，在spring-data項目中增加了對redis的支持spring-data-redis，單獨引入依賴：
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>1.4.2.RELEASE</version>
</dependency>使用spring-data-redis提供的RedisTemplate對redis操作，spring配置如下：
<?xml version='1.0' encoding='UTF-8'?>
<beans xmlns='http://www.springframework.org/schema/beans'
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
xmlns:context='http://www.springframework.org/schema/context'
xmlns:c='http://www.springframework.org/schema/c'
xmlns:p='http://www.springframework.org/schema/p'
xmlns:cache='http://www.springframework.org/schema/cache'
xsi:schemaLocation='
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd
'>
<!-- 啟用緩存注解功能，這個是必須的，否則注解不會生效，另外，該注解一定要聲明在spring主配置文件中才會生效 -->
<cache:annotation-driven cache-manager="cacheManager" />
<bean id="userService" class="org.springframework.cache.demo.UserService" />
<!-- 聲明cacheManager -->
<bean id="cacheManager" class="org.springframework.data.redis.cache.RedisCacheManager"
c:template-ref="redisTemplate" />
<!-- redis 相關配置 -->
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxIdle" value="300" />
<property name="maxWaitMillis" value="3000" />
<property name="testOnBorrow" value="true" />
</bean>
<bean id="jedisConnectionFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:host-name="192.168.1.90" p:port="6379" p:pool-config-ref="jedisPoolConfig"
p:database="0" p:use-pool="true" />
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
p:connection-factory-ref="jedisConnectionFactory" />
</beans>
下面關於Redis的文章您也可能喜歡，不妨參考下：
Ubuntu 14.04下Redis安裝及簡單測試 http://www.linuxidc.com/Linux/2014-05/101544.htm
Redis主從復制基本配置 http://www.linuxidc.com/Linux/2015-03/115610.htm
Redis集群明細文檔 http://www.linuxidc.com/Linux/2013-09/90118.htm
Ubuntu 12.10下安裝Redis（圖文詳解）+ Jedis連接Redis http://www.linuxidc.com/Linux/2013-06/85816.htm
Redis系列-安裝部署維護篇 http://www.linuxidc.com/Linux/2012-12/75627.htm
CentOS 6.3安裝Redis http://www.linuxidc.com/Linux/2012-12/75314.htm
Redis安裝部署學習筆記 http://www.linuxidc.com/Linux/2014-07/104306.htm
Redis配置文件redis.conf 詳解 http://www.linuxidc.com/Linux/2013-11/92524.htm
Redis 的詳細介紹：請點這裡
Redis 的下載地址：請點這裡
