Spring Cache注解+Redis

Spring3.1 Cache注解 

依赖jar包：

<!-- redis -->
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-redis</artifactId>
			<version>1.3.4.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
			<version>2.5.2</version>
		</dependency>

 applicationContext-cache-redis.xml

 

<context:property-placeholder
		location="classpath:/config/properties/redis.properties" />

	<!-- 启用缓存注解功能，这个是必须的，否则注解不会生效，另外，该注解一定要声明在spring主配置文件中才会生效 -->
	<cache:annotation-driven cache-manager="cacheManager" />

	<!-- spring自己的换管理器，这里定义了两个缓存位置名称 ，既注解中的value -->
	<bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
		<property name="caches">
			<set>
				<bean class="org.cpframework.cache.redis.RedisCache">
					<property name="redisTemplate" ref="redisTemplate" />
					<property name="name" value="default"/>
				</bean>
				<bean class="org.cpframework.cache.redis.RedisCache">
					<property name="redisTemplate" ref="redisTemplate02" />
					<property name="name" value="commonCache"/>
				</bean>
			</set>
		</property>
	</bean>

	<!-- redis 相关配置 -->
	<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="connectionFactory"
		class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
		p:host-name="${redis.host}" p:port="${redis.port}" p:pool-config-ref="poolConfig"
		p:database="${redis.database}" />

	<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
		<property name="connectionFactory" ref="connectionFactory" />
	</bean>
	
	<bean id="connectionFactory02"
		class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
		p:host-name="${redis.host}" p:port="${redis.port}" p:pool-config-ref="poolConfig"
		p:database="${redis.database}" />

	<bean id="redisTemplate02" class="org.springframework.data.redis.core.RedisTemplate">
		<property name="connectionFactory" ref="connectionFactory02" />
	</bean>

redis.properties

 

# Redis settings  
# server IP
redis.host=192.168.xx.xx
# server port
redis.port=6379   
# use dbIndex
redis.database=0
# 控制一个pool最多有多少个状态为idle(空闲的)的jedis实例
redis.maxIdle=300  
# 表示当borrow(引入)一个jedis实例时，最大的等待时间，如果超过等待时间(毫秒)，则直接抛出JedisConnectionException；
redis.maxWait=3000  
# 在borrow一个jedis实例时，是否提前进行validate操作；如果为true，则得到的jedis实例均是可用的
redis.testOnBorrow=true  

 

RedisCache.java

 

package org.cpframework.cache.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() {
		// TODO Auto-generated method stub
		return this.name;
	}

	@Override
	public Object getNativeCache() {
		// TODO Auto-generated method stub
		return this.redisTemplate;
	}

	@Override
	public ValueWrapper get(Object key) {
		// TODO Auto-generated method stub
		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) {
		// TODO Auto-generated method stub
		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转byte[]>. <br>
	 * <p>
	 * <使用方法说明>
	 * </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[]转Object>. <br>
	 * <p>
	 * <使用方法说明>
	 * </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) {
		// TODO Auto-generated method stub
		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() {
		// TODO Auto-generated method stub
		redisTemplate.execute(new RedisCallback<String>() {
			public String doInRedis(RedisConnection connection)
					throws DataAccessException {
				connection.flushDb();
				return "ok";
			}
		});
	}

}