spring整合redis的实现

项目需求：电商项目中的广告位数据和商品类目数据量比较大，内容变化小，每次查询消耗时间长，所以可以添加缓存，提高访问首页的速度。

实现：
使用Redis实现缓存。

Redis是一款高性能的NOSQL数据库，功能强大。

一：使用sprig-data-redis和jedis进行整合

1：maven依赖

<dependency>
	<groupId>org.springframework.data</groupId>
	<artifactId>spring-data-redis</artifactId>
	<version>1.8.4.RELEASE</version>
</dependency>
<dependency>
	<groupId>redis.clients</groupId>
	<artifactId>jedis</artifactId>
	<version>2.9.0</version>
</dependency>

2：reids.properties

redis.host = 114.225.83.3
redis.port = 6379  
redis.passwd = 123456
  
#最大能够保持idle状态的对象数  
redis.maxIdle=300  
#最大分配的对象数    注意：低版本的jedis该属性名称是 maxActive
redis.maxTotal=600 
#当池内没有返回对象时，最大等待时间  注意：低版本的jedis该属性名称是 maxWait
redis.maxWaitMillis=1000  
#当调用borrow Object方法时，是否进行有效性检查  
redis.testOnBorrow=true 
#超时时间
redis.timeout=100000

3：applicationContext-redis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">


	<!-- redis配置文件 -->
	<context:property-placeholder location="classpath:/redis.properties"
		ignore-unresolvable="true" />

     <!-- 配置连接池参数 -->
	<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
		<property name="maxIdle" value="${redis.maxIdle}" />
		<property name="maxTotal" value="${redis.maxTotal}" />
		<property name="maxWaitMillis" value="${redis.maxWaitMillis}" />
		<property name="testOnBorrow" value="${redis.testOnBorrow}" />
	</bean>

    <!-- 配置连接工厂 -->
	<bean id="connectionFactory"
		class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
		<property name="hostName" value="${redis.host}" />
		<property name="port" value="${redis.port}" />
		<!-- 如果redis没有开启验证,password不需要配置 -->
		<property name="password" value="${redis.passwd}"></property>
		<property name="timeout" value="${redis.timeout}"></property>
		<property name="poolConfig" ref="poolConfig" />
	</bean>

    <!-- 配置模版 -->
	<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
		<property name="connectionFactory" ref="connectionFactory" />
		<!-- key的序列化策略 -->
		<property name="keySerializer">
		    <!-- 字符串编码，数据以string存储 -->
			<bean class="org.springframework.data.redis.serializer.StringRedisSerializer"></bean>
		</property>
		<!-- value的序列化策略 -->
		<property name="valueSerializer">
		    <!-- 使用JDK的序列化手段(serializable接口，ObjectInputStrean，ObjectOutputStream)，数据以字节流存储 -->
			<bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"></bean>
		</property>
	</bean>

</beans>

3：定义模版-BaseRedis

package com.debo.redis;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;

  
public abstract class BaseRedis<K, V> {  
      
    @Autowired  
    protected RedisTemplate<K, V> redisTemplate;  
  
    public void setRedisTemplate(RedisTemplate<K, V> redisTemplate) {  
        this.redisTemplate = redisTemplate;  
    }  
      
    protected RedisSerializer<String> getRedisSerializer() {  
        return redisTemplate.getStringSerializer();  
    }  
}

4：定义一个序列化对象-pojo

package com.mote.entity;

import java.io.Serializable;

public class Pojo implements Serializable{
	
	private static final long serialVersionUID = 6703029746128139046L;
	
	private String id;
	private String name;
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
	
}

5：redis操作接口类 -RedisService

package com.debo.redis;

import java.util.List;
import java.util.Set;

import com.mote.entity.Pojo;


public interface RedisService {
	
	//添加
    boolean add(Pojo pojo);  
      
    //批量添加
    boolean add(List<Pojo> list);  
      
    //删除
    void delete(String key);  
      
    //批量删除
    void delete(List<String> keys);  
    
    //更新
    boolean update(Pojo pojo);  
  
    //查询
    Pojo get(String keyId);
    
    //获取所有key
    Set<String> getKeys();
    
    //清空
    boolean flushDB();

}

6：redis操作类-RedisServiceImpl

package com.debo.redis;

import java.io.Serializable;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;

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.ValueOperations;
import org.springframework.stereotype.Service;

import com.mote.entity.Pojo;


@Service("redisService")
public class RedisServiceImpl extends BaseRedis<String, Serializable> implements RedisService
{

	public boolean add(final Pojo pojo) {
		 ValueOperations<String, Serializable> valueOper = redisTemplate.opsForValue();
		 //设值，并且过期时间设为3分钟
         valueOper.set(pojo.getId(), pojo, 3, TimeUnit.MINUTES);
         return true;
	}

	public boolean add(final List<Pojo> list) {
		 ValueOperations<String, Serializable> valueOper = redisTemplate.opsForValue();
         for (Pojo trli : list) {
             valueOper.set(trli.getId(), trli);
         }
         return true;
	}

	public void delete(String key) {
		redisTemplate.delete(key);
	}

	public void delete(List<String> keys) {
		 redisTemplate.delete(keys);
	}

	public boolean update(Pojo pojo) {
		String id = pojo.getId();
        if (get(id) == null) {
            throw new NullPointerException("数据行不存在, key = " + id);
        }
        ValueOperations<String, Serializable> valueOper = redisTemplate.opsForValue();
        valueOper.set(pojo.getId(), pojo);
        return true;
        
	}

	public Pojo get(String keyId) {
		 ValueOperations<String, Serializable> operations = redisTemplate.opsForValue();
         Pojo pojo = null;
         try{
         	pojo = (Pojo)operations.get(keyId);
         }catch(Exception e)
         {
         	e.printStackTrace();
         }
         return pojo;
	}

	public Set<String> getKeys() {
		return redisTemplate.keys("*");
	}

	public boolean flushDB() {
		boolean result = redisTemplate.execute(new RedisCallback<Boolean>() {
            public Boolean doInRedis(RedisConnection connection)
                    throws DataAccessException {
                connection.flushDb();
                return true;
            }
        });
        return result;
	}
	
	
     
}

二：不使用spring-data-redis

1：maven依赖

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

2：redis.properties

redis.host = 114.225.83.3
redis.port = 6379  
redis.passwd = 123456
  
#最大能够保持idle状态的对象数  
redis.maxIdle=300  
#最大分配的对象数    注意：低版本的jedis该属性名称是 maxActive
redis.maxTotal=600 
#当池内没有返回对象时，最大等待时间  注意：低版本的jedis该属性名称是 maxWait
redis.maxWaitMillis=1000  
#当调用borrow Object方法时，是否进行有效性检查  
redis.testOnBorrow=true 
#超时时间
redis.timeout=100000

3：applicationContext-redis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">


	<!-- 加载redis配置文件 -->
	<context:property-placeholder location="classpath:/redis.properties"
		ignore-unresolvable="true" />

     <!-- 配置池参数 -->
     <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxTotal" value="${redis.maxTotal}" />
        <property name="maxIdle" value="${redis.maxIdle}" />
        <property name="MaxWaitMillis" value="${redis.MaxWaitMillis}" />
        <property name="testOnBorrow" value="${redis.testOnBorrow}"/>
    </bean>

    <!-- 连接池 -->
    <bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool"  scope="singleton">
        <constructor-arg index="0" ref="jedisPoolConfig" />
        <constructor-arg index="1">
            <list>
                <bean class="redis.clients.jedis.JedisShardInfo">
                    <constructor-arg name="host" value="${redis.host}" />
                    <constructor-arg name="port" value="${redis.port}" />
                    <constructor-arg name="timeout" value="${redis.timeout}" />
                    <!-- 配置redis认证密码 -->
                    <property name="password" value="${redis.passwd}"></property>
                </bean>
                <!-- TODO ： 这里可以配置多个redis节点 -->
            </list>
        </constructor-arg>
    </bean>
</beans>

4：redis操作实现类

package com.debo.redis;

public interface Function <T,E>{

	public T callback(E e);
}

package com.debo.redis;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;

@Service
public class RedisService {
	@Autowired
	private ShardedJedisPool shardedJedisPool;

	private <T> T execute(Function<T, ShardedJedis> fun) {
		ShardedJedis shardedJedis = null;
		try {
			// 从连接池中获取到jedis分片对象
			shardedJedis = shardedJedisPool.getResource();
			return fun.callback(shardedJedis);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (null != shardedJedis) {
				// 关闭，检测连接是否有效，有效则放回到连接池中，无效则重置状态
				shardedJedis.close();
			}
		}
		return null;
	}

	/**
	 * 执行set操作
	 * 
	 * @param key
	 * @param value
	 * @return
	 */
	public String set(final String key, final String value) {
		return this.execute(new Function<String, ShardedJedis>() {
			@Override
			public String callback(ShardedJedis e) {
				return e.set(key, value);
			}
		});
	}

	/**
	 * 执行GET操作
	 * 
	 * @param key
	 * @return
	 */
	public String get(final String key) {
		return this.execute(new Function<String, ShardedJedis>() {
			@Override
			public String callback(ShardedJedis e) {
				return e.get(key);
			}
		});
	}

	/**
	 * 执行DEL操作
	 * 
	 * @param key
	 * @return
	 */
	public Long del(final String key) {
		return this.execute(new Function<Long, ShardedJedis>() {
			@Override
			public Long callback(ShardedJedis e) {
				return e.del(key);
			}
		});
	}

	/**
	 * 设置生存时间，单位为秒
	 * 
	 * @param key
	 * @param seconds
	 * @return
	 */
	public Long expire(final String key, final Integer seconds) {
		return this.execute(new Function<Long, ShardedJedis>() {
			@Override
			public Long callback(ShardedJedis e) {
				return e.expire(key, seconds);
			}
		});
	}

	/**
	 * 执行set操作并且设置生存时间，单位为秒
	 * 
	 * @param key
	 * @param value
	 * @return
	 */
	public String set(final String key, final String value,
			final Integer seconds) {
		return this.execute(new Function<String, ShardedJedis>() {
			@Override
			public String callback(ShardedJedis e) {
				String str = e.set(key, value);
				e.expire(key, seconds);
				return str;
			}
		});
	}
}

spring整合redis的实现

一：使用sprig-data-redis和jedis进行整合

二：不使用spring-data-redis

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