商铺项目（Redis缓存）

AOF，RDB是两种 redis持久化的机制。用于crash后，redis的恢复。

两种区别就是，AOF是持续的用日志记录写操作，crash后利用日志恢复；RDB是平时写操作的时候不触发写，只有手动提交save命令，或者是关闭命令时，才触发备份操作。

选择的标准，就是看系统是愿意牺牲一些性能，换取更高的缓存一致性（AOF），还是愿意写操作频繁的时候，不启用备份来换取更高的性能，待手动运行save的时候，再做备份（RDB）。RDB这个就更有些 eventually consistent的意思了。

先讲讲配置：

<!-- redis客户端:Jedis -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>

<?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"
    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">
    <!-- Redis连接池的设置 -->
    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <!-- 控制一个pool可分配多少个jedis实例 -->
        <property name="maxTotal" value="${redis.pool.maxActive}" />
        <!-- 连接池中最多可空闲maxIdle个连接 ，这里取值为20，表示即使没有数据库连接时依然可以保持20空闲的连接，而不被清除，随时处于待命状态。 -->
        <property name="maxIdle" value="${redis.pool.maxIdle}" />
        <!-- 最大等待时间:当没有可用连接时,连接池等待连接被归还的最大时间(以毫秒计数),超过时间则抛出异常 -->
        <property name="maxWaitMillis" value="${redis.pool.maxWait}" />
        <!-- 在获取连接的时候检查有效性 -->
        <property name="testOnBorrow" value="${redis.pool.testOnBorrow}" />
    </bean>

    <!-- 创建Redis连接池，并做相关配置 -->
    <bean id="jedisWritePool" class="com.ouyan.o2o.cache.JedisPoolWriper"
        depends-on="jedisPoolConfig">
        <constructor-arg index="0" ref="jedisPoolConfig" />
        <constructor-arg index="1" value="${redis.hostname}" />
        <constructor-arg index="2" value="${redis.port}" type="int" />
    </bean>

    <!-- 创建Redis工具类，封装好Redis的连接以进行相关的操作 -->
    <bean id="jedisUtil" class="com.ouyan.o2o.cache.JedisUtil" scope="singleton">
        <property name="jedisPool">
            <ref bean="jedisWritePool" />
        </property>
    </bean>
    <!-- Redis的key操作 -->
    <bean id="jedisKeys" class="com.ouyan.o2o.cache.JedisUtil$Keys"
        scope="singleton">
        <constructor-arg ref="jedisUtil"></constructor-arg>
    </bean>
    <!-- Redis的Strings操作 -->
    <bean id="jedisStrings" class="com.ouyan.o2o.cache.JedisUtil$Strings"
        scope="singleton">
        <constructor-arg ref="jedisUtil"></constructor-arg>
    </bean>
    <!-- Redis的Lists操作 -->
    <bean id="jedisLists" class="com.ouyan.o2o.cache.JedisUtil$Lists"
        scope="singleton">
        <constructor-arg ref="jedisUtil"></constructor-arg>
    </bean>
    <!-- Redis的Sets操作 -->
    <bean id="jedisSets" class="com.ouyan.o2o.cache.JedisUtil$Sets"
        scope="singleton">
        <constructor-arg ref="jedisUtil"></constructor-arg>
    </bean>
    <!-- Redis的HashMap操作 -->
    <bean id="jedisHash" class="com.ouyan.o2o.cache.JedisUtil$Hash"
        scope="singleton">
        <constructor-arg ref="jedisUtil"></constructor-arg>
    </bean>
</beans>    

redis.hostname=39.108.63.239
redis.port=6379
redis.database=0
redis.pool.maxActive=100
redis.pool.maxIdle=20
redis.pool.maxWait=3000
redis.pool.testOnBorrow=true

<?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"
    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">
    <!-- 配置整合mybatis过程 -->
        <!-- 1.配置数据库相关参数properties的属性：${url} -->
    <bean class="com.ouyan.o2o.util.EncryptPropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:jdbc.properties</value>
                <value>classpath:redis.properties</value>
            </list>
        </property>
        <property name="fileEncoding" value="UTF-8" />
    </bean>
    <!-- 2.数据库连接池 -->
    <bean id="abstractDataSource" abstract="true" destroy-method="close"
        class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!-- c3p0连接池的私有属性 -->
        <property name="maxPoolSize" value="30" />
        <property name="minPoolSize" value="10" />
        <!-- 关闭连接后不自动commit -->
        <property name="autoCommitOnClose" value="false" />
        <!-- 获取连接超时时间 -->
        <property name="checkoutTimeout" value="10000" />
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireRetryAttempts" value="2" />
    </bean>
    <bean id="master" parent="abstractDataSource">
        <!-- 配置连接池属性 -->
        <property name="driverClass" value="${jdbc.driver}" />
        <property name="jdbcUrl" value="${jdbc.master.url}" />
        <property name="user" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>
    <bean id="slave" parent="abstractDataSource">
        <!-- 配置连接池属性 -->
        <property name="driverClass" value="${jdbc.driver}" />
        <property name="jdbcUrl" value="${jdbc.slave.url}" />
        <property name="user" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>
    <!-- 3.配置SqlSessionFactory对象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource" />
        <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml" />
        <!-- 扫描entity包 使用别名 -->
        <property name="typeAliasesPackage" value="com.ouyan.o2o.entity" />
        <!-- 扫描sql配置文件:mapper需要的xml文件 -->
        <property name="mapperLocations" value="classpath:mapper/*.xml" />
    </bean>
    <!-- 配置动态数据源，这儿targetDataSources就是路由数据源对应的名称 -->
    <bean id="dynamicDataSource" class="com.ouyan.o2o.dao.split.DynamicDataSource">
        <property name="targetDataSources">
            <map>
                <entry value-ref="master" key="master"></entry>
                <entry value-ref="slave" key="slave"></entry>
            </map>
        </property>
    </bean>
    <bean id="dataSource" class="org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy">
        <property name="targetDataSource">
            <ref bean="dynamicDataSource"/>
        </property>
    </bean>
    <!-- 4.配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="com.ouyan.o2o.dao" />
    </bean>
</beans>

package com.ouyan.o2o.cache;

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

/**
 * 强指定redis的JedisPool接口构造函数，这样才能在centos成功创建jedispool
 *
 * @author ouyan
 *
 */
public class JedisPoolWriper {
    /** Redis连接池对象 */
    private JedisPool jedisPool;

    public JedisPoolWriper(final JedisPoolConfig poolConfig, final String host,
            final int port) {
        try {
            jedisPool = new JedisPool(poolConfig, host, port);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取Redis连接池对象
     * @return
     */
    public JedisPool getJedisPool() {
        return jedisPool;
    }

    /**
     * 注入Redis连接池对象
     * @param jedisPool
     */
    public void setJedisPool(JedisPool jedisPool) {
        this.jedisPool = jedisPool;
    }

}

package com.ouyan.o2o.cache;

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

import redis.clients.jedis.BinaryClient.LIST_POSITION;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.SortingParams;
import redis.clients.util.SafeEncoder;

public class JedisUtil {
    /**
     * 缓存生存时间
     */
    private final int expire = 60000;
    /** 操作Key的方法 */
    public Keys KEYS;
    /** 对存储结构为String类型的操作 */
    public Strings STRINGS;
    /** 对存储结构为List类型的操作 */
    public Lists LISTS;
    /** 对存储结构为Set类型的操作 */
    public Sets SETS;
    /** 对存储结构为HashMap类型的操作 */
    public Hash HASH;

    /** Redis连接池对象 */
    private JedisPool jedisPool;

    /**
     * 获取redis连接池
     *
     * @return
     */
    public JedisPool getJedisPool() {
        return jedisPool;
    }

    /**
     * 设置redis连接池
     *
     * @return
     */
    public void setJedisPool(JedisPoolWriper jedisPoolWriper) {
        this.jedisPool = jedisPoolWriper.getJedisPool();
    }

    /**
     * 从jedis连接池中获取获取jedis对象
     *
     * @return
     */
    public Jedis getJedis() {
        return jedisPool.getResource();
    }

    /**
     * 设置过期时间
     *
     * @author ouyan
     * @param key
     * @param seconds
     */
    public void expire(String key, int seconds) {
        if (seconds <= 0) {
            return;
        }
        Jedis jedis = getJedis();
        jedis.expire(key, seconds);
        jedis.close();
    }

    /**
     * 设置默认过期时间
     *
     * @author ouyan
     * @param key
     */
    public void expire(String key) {
        expire(key, expire);
    }

    // *******************************************Keys*******************************************//
    public class Keys {

        /**
         * 清空所有key
         */
        public String flushAll() {
            Jedis jedis = getJedis();
            String stata = jedis.flushAll();
            jedis.close();
            return stata;
        }

        /**
         * 更改key
         *
         * @param String
         *            oldkey
         * @param String
         *            newkey
         * @return 状态码
         */
        public String rename(String oldkey, String newkey) {
            return rename(SafeEncoder.encode(oldkey), SafeEncoder.encode(newkey));
        }

        /**
         * 更改key,仅当新key不存在时才执行
         *
         * @param String
         *            oldkey
         * @param String
         *            newkey
         * @return 状态码
         */
        public long renamenx(String oldkey, String newkey) {
            Jedis jedis = getJedis();
            long status = jedis.renamenx(oldkey, newkey);
            jedis.close();
            return status;
        }

        /**
         * 更改key
         *
         * @param String
         *            oldkey
         * @param String
         *            newkey
         * @return 状态码
         */
        public String rename(byte[] oldkey, byte[] newkey) {
            Jedis jedis = getJedis();
            String status = jedis.rename(oldkey, newkey);
            jedis.close();
            return status;
        }

        /**
         * 设置key的过期时间，以秒为单位
         *
         * @param String
         *            key
         * @param 时间
         *            ,已秒为单位
         * @return 影响的记录数
         */
        public long expired(String key, int seconds) {
            Jedis jedis = getJedis();
            long count = jedis.expire(key, seconds);
            jedis.close();
            return count;
        }

        /**
         * 设置key的过期时间,它是距历元（即格林威治标准时间 1970 年 1 月 1 日的 00:00:00，格里高利历）的偏移量。
         *
         * @param String
         *            key
         * @param 时间
         *            ,已秒为单位
         * @return 影响的记录数
         */
        public long expireAt(String key, long timestamp) {
            Jedis jedis = getJedis();
            long count = jedis.expireAt(key, timestamp);
            jedis.close();
            return count;
        }

        /**
         * 查询key的过期时间
         *
         * @param String
         *            key
         * @return 以秒为单位的时间表示
         */
        public long ttl(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            long len = sjedis.ttl(key);
            sjedis.close();
            return len;
        }

        /**
         * 取消对key过期时间的设置
         *
         * @param key
         * @return 影响的记录数
         */
        public long persist(String key) {
            Jedis jedis = getJedis();
            long count = jedis.persist(key);
            jedis.close();
            return count;
        }

        /**
         * 删除keys对应的记录,可以是多个key
         *
         * @param String
         *            ... keys
         * @return 删除的记录数
         */
        public long del(String... keys) {
            Jedis jedis = getJedis();
            long count = jedis.del(keys);
            jedis.close();
            return count;
        }

        /**
         * 删除keys对应的记录,可以是多个key
         *
         * @param String
         *            ... keys
         * @return 删除的记录数
         */
        public long del(byte[]... keys) {
            Jedis jedis = getJedis();
            long count = jedis.del(keys);
            jedis.close();
            return count;
        }

        /**
         * 判断key是否存在
         *
         * @param String
         *            key
         * @return boolean
         */
        public boolean exists(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            boolean exis = sjedis.exists(key);
            sjedis.close();
            return exis;
        }

        /**
         * 对List,Set,SortSet进行排序,如果集合数据较大应避免使用这个方法
         *
         * @param String
         *            key
         * @return List<String> 集合的全部记录
         **/
        public List<String> sort(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            List<String> list = sjedis.sort(key);
            sjedis.close();
            return list;
        }

        /**
         * 对List,Set,SortSet进行排序或limit
         *
         * @param String
         *            key
         * @param SortingParams
         *            parame 定义排序类型或limit的起止位置.
         * @return List<String> 全部或部分记录
         **/
        public List<String> sort(String key, SortingParams parame) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            List<String> list = sjedis.sort(key, parame);
            sjedis.close();
            return list;
        }

        /**
         * 返回指定key存储的类型
         *
         * @param String
         *            key
         * @return String string|list|set|zset|hash
         **/
        public String type(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            String type = sjedis.type(key);
            sjedis.close();
            return type;
        }

        /**
         * 查找所有匹配给定的模式的键
         *
         * @param String
         *            key的表达式,*表示多个，？表示一个
         */
        public Set<String> keys(String pattern) {
            Jedis jedis = getJedis();
            Set<String> set = jedis.keys(pattern);
            jedis.close();
            return set;
        }
    }

    // *******************************************Strings*******************************************//
    public class Strings {
        /**
         * 根据key获取记录
         *
         * @param String
         *            key
         * @return 值
         */
        public String get(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            String value = sjedis.get(key);
            sjedis.close();
            return value;
        }

        /**
         * 根据key获取记录
         *
         * @param byte[]
         *            key
         * @return 值
         */
        public byte[] get(byte[] key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            byte[] value = sjedis.get(key);
            sjedis.close();
            return value;
        }

        /**
         * 添加记录,如果记录已存在将覆盖原有的value
         *
         * @param String
         *            key
         * @param String
         *            value
         * @return 状态码
         */
        public String set(String key, String value) {
            return set(SafeEncoder.encode(key), SafeEncoder.encode(value));
        }

        /**
         * 添加记录,如果记录已存在将覆盖原有的value
         *
         * @param String
         *            key
         * @param String
         *            value
         * @return 状态码
         */
        public String set(String key, byte[] value) {
            return set(SafeEncoder.encode(key), value);
        }

        /**
         * 添加记录,如果记录已存在将覆盖原有的value
         *
         * @param byte[]
         *            key
         * @param byte[]
         *            value
         * @return 状态码
         */
        public String set(byte[] key, byte[] value) {
            Jedis jedis = getJedis();
            String status = jedis.set(key, value);
            jedis.close();
            return status;
        }

        /**
         * 添加有过期时间的记录
         *
         * @param String
         *            key
         * @param int
         *            seconds 过期时间，以秒为单位
         * @param String
         *            value
         * @return String 操作状态
         */
        public String setEx(String key, int seconds, String value) {
            Jedis jedis = getJedis();
            String str = jedis.setex(key, seconds, value);
            jedis.close();
            return str;
        }

        /**
         * 添加有过期时间的记录
         *
         * @param String
         *            key
         * @param int
         *            seconds 过期时间，以秒为单位
         * @param String
         *            value
         * @return String 操作状态
         */
        public String setEx(byte[] key, int seconds, byte[] value) {
            Jedis jedis = getJedis();
            String str = jedis.setex(key, seconds, value);
            jedis.close();
            return str;
        }

        /**
         * 添加一条记录，仅当给定的key不存在时才插入
         *
         * @param String
         *            key
         * @param String
         *            value
         * @return long 状态码，1插入成功且key不存在，0未插入，key存在
         */
        public long setnx(String key, String value) {
            Jedis jedis = getJedis();
            long str = jedis.setnx(key, value);
            jedis.close();
            return str;
        }

        /**
         * 从指定位置开始插入数据，插入的数据会覆盖指定位置以后的数据<br/>
         * 例:String str1="123456789";<br/>
         * 对str1操作后setRange(key,4,0000)，str1="123400009";
         *
         * @param String
         *            key
         * @param long
         *            offset
         * @param String
         *            value
         * @return long value的长度
         */
        public long setRange(String key, long offset, String value) {
            Jedis jedis = getJedis();
            long len = jedis.setrange(key, offset, value);
            jedis.close();
            return len;
        }

        /**
         * 在指定的key中追加value
         *
         * @param String
         *            key
         * @param String
         *            value
         * @return long 追加后value的长度
         **/
        public long append(String key, String value) {
            Jedis jedis = getJedis();
            long len = jedis.append(key, value);
            jedis.close();
            return len;
        }

        /**
         * 将key对应的value减去指定的值，只有value可以转为数字时该方法才可用
         *
         * @param String
         *            key
         * @param long
         *            number 要减去的值
         * @return long 减指定值后的值
         */
        public long decrBy(String key, long number) {
            Jedis jedis = getJedis();
            long len = jedis.decrBy(key, number);
            jedis.close();
            return len;
        }

        /**
         * <b>可以作为获取唯一id的方法</b><br/>
         * 将key对应的value加上指定的值，只有value可以转为数字时该方法才可用
         *
         * @param String
         *            key
         * @param long
         *            number 要减去的值
         * @return long 相加后的值
         */
        public long incrBy(String key, long number) {
            Jedis jedis = getJedis();
            long len = jedis.incrBy(key, number);
            jedis.close();
            return len;
        }

        /**
         * 对指定key对应的value进行截取
         *
         * @param String
         *            key
         * @param long
         *            startOffset 开始位置(包含)
         * @param long
         *            endOffset 结束位置(包含)
         * @return String 截取的值
         */
        public String getrange(String key, long startOffset, long endOffset) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            String value = sjedis.getrange(key, startOffset, endOffset);
            sjedis.close();
            return value;
        }

        /**
         * 获取并设置指定key对应的value<br/>
         * 如果key存在返回之前的value,否则返回null
         *
         * @param String
         *            key
         * @param String
         *            value
         * @return String 原始value或null
         */
        public String getSet(String key, String value) {
            Jedis jedis = getJedis();
            String str = jedis.getSet(key, value);
            jedis.close();
            return str;
        }

        /**
         * 批量获取记录,如果指定的key不存在返回List的对应位置将是null
         *
         * @param String
         *            keys
         * @return List<String> 值得集合
         */
        public List<String> mget(String... keys) {
            Jedis jedis = getJedis();
            List<String> str = jedis.mget(keys);
            jedis.close();
            return str;
        }

        /**
         * 批量存储记录
         *
         * @param String
         *            keysvalues 例:keysvalues="key1","value1","key2","value2";
         * @return String 状态码
         */
        public String mset(String... keysvalues) {
            Jedis jedis = getJedis();
            String str = jedis.mset(keysvalues);
            jedis.close();
            return str;
        }

        /**
         * 获取key对应的值的长度
         *
         * @param String
         *            key
         * @return value值得长度
         */
        public long strlen(String key) {
            Jedis jedis = getJedis();
            long len = jedis.strlen(key);
            jedis.close();
            return len;
        }
    }

    // *******************************************Sets*******************************************//
    public class Sets {

        /**
         * 向Set添加一条记录，如果member已存在返回0,否则返回1
         *
         * @param String
         *            key
         * @param String
         *            member
         * @return 操作码,0或1
         */
        public long sadd(String key, String member) {
            Jedis jedis = getJedis();
            long s = jedis.sadd(key, member);
            jedis.close();
            return s;
        }

        public long sadd(byte[] key, byte[] member) {
            Jedis jedis = getJedis();
            long s = jedis.sadd(key, member);
            jedis.close();
            return s;
        }

        /**
         * 获取给定key中元素个数
         *
         * @param String
         *            key
         * @return 元素个数
         */
        public long scard(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            long len = sjedis.scard(key);
            sjedis.close();
            return len;
        }

        /**
         * 返回从第一组和所有的给定集合之间的差异的成员
         *
         * @param String
         *            ... keys
         * @return 差异的成员集合
         */
        public Set<String> sdiff(String... keys) {
            Jedis jedis = getJedis();
            Set<String> set = jedis.sdiff(keys);
            jedis.close();
            return set;
        }

        /**
         * 这个命令等于sdiff,但返回的不是结果集,而是将结果集存储在新的集合中，如果目标已存在，则覆盖。
         *
         * @param String
         *            newkey 新结果集的key
         * @param String
         *            ... keys 比较的集合
         * @return 新集合中的记录数
         **/
        public long sdiffstore(String newkey, String... keys) {
            Jedis jedis = getJedis();
            long s = jedis.sdiffstore(newkey, keys);
            jedis.close();
            return s;
        }

        /**
         * 返回给定集合交集的成员,如果其中一个集合为不存在或为空，则返回空Set
         *
         * @param String
         *            ... keys
         * @return 交集成员的集合
         **/
        public Set<String> sinter(String... keys) {
            Jedis jedis = getJedis();
            Set<String> set = jedis.sinter(keys);
            jedis.close();
            return set;
        }

        /**
         * 这个命令等于sinter,但返回的不是结果集,而是将结果集存储在新的集合中，如果目标已存在，则覆盖。
         *
         * @param String
         *            newkey 新结果集的key
         * @param String
         *            ... keys 比较的集合
         * @return 新集合中的记录数
         **/
        public long sinterstore(String newkey, String... keys) {
            Jedis jedis = getJedis();
            long s = jedis.sinterstore(newkey, keys);
            jedis.close();
            return s;
        }

        /**
         * 确定一个给定的值是否存在
         *
         * @param String
         *            key
         * @param String
         *            member 要判断的值
         * @return 存在返回1，不存在返回0
         **/
        public boolean sismember(String key, String member) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            boolean s = sjedis.sismember(key, member);
            sjedis.close();
            return s;
        }

        /**
         * 返回集合中的所有成员
         *
         * @param String
         *            key
         * @return 成员集合
         */
        public Set<String> smembers(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            Set<String> set = sjedis.smembers(key);
            sjedis.close();
            return set;
        }

        public Set<byte[]> smembers(byte[] key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            Set<byte[]> set = sjedis.smembers(key);
            sjedis.close();
            return set;
        }

        /**
         * 将成员从源集合移出放入目标集合 <br/>
         * 如果源集合不存在或不包哈指定成员，不进行任何操作，返回0<br/>
         * 否则该成员从源集合上删除，并添加到目标集合，如果目标集合中成员已存在，则只在源集合进行删除
         *
         * @param String
         *            srckey 源集合
         * @param String
         *            dstkey 目标集合
         * @param String
         *            member 源集合中的成员
         * @return 状态码，1成功，0失败
         */
        public long smove(String srckey, String dstkey, String member) {
            Jedis jedis = getJedis();
            long s = jedis.smove(srckey, dstkey, member);
            jedis.close();
            return s;
        }

        /**
         * 从集合中删除成员
         *
         * @param String
         *            key
         * @return 被删除的成员
         */
        public String spop(String key) {
            Jedis jedis = getJedis();
            String s = jedis.spop(key);
            jedis.close();
            return s;
        }

        /**
         * 从集合中删除指定成员
         *
         * @param String
         *            key
         * @param String
         *            member 要删除的成员
         * @return 状态码，成功返回1，成员不存在返回0
         */
        public long srem(String key, String member) {
            Jedis jedis = getJedis();
            long s = jedis.srem(key, member);
            jedis.close();
            return s;
        }

        /**
         * 合并多个集合并返回合并后的结果，合并后的结果集合并不保存<br/>
         *
         * @param String
         *            ... keys
         * @return 合并后的结果集合
         * @see sunionstore
         */
        public Set<String> sunion(String... keys) {
            Jedis jedis = getJedis();
            Set<String> set = jedis.sunion(keys);
            jedis.close();
            return set;
        }

        /**
         * 合并多个集合并将合并后的结果集保存在指定的新集合中，如果新集合已经存在则覆盖
         *
         * @param String
         *            newkey 新集合的key
         * @param String
         *            ... keys 要合并的集合
         **/
        public long sunionstore(String newkey, String... keys) {
            Jedis jedis = getJedis();
            long s = jedis.sunionstore(newkey, keys);
            jedis.close();
            return s;
        }
    }

    // *******************************************Hash*******************************************//
    public class Hash {

        /**
         * 从hash中删除指定的存储
         *
         * @param String
         *            key
         * @param String
         *            fieid 存储的名字
         * @return 状态码，1成功，0失败
         */
        public long hdel(String key, String fieid) {
            Jedis jedis = getJedis();
            long s = jedis.hdel(key, fieid);
            jedis.close();
            return s;
        }

        public long hdel(String key) {
            Jedis jedis = getJedis();
            long s = jedis.del(key);
            jedis.close();
            return s;
        }

        /**
         * 测试hash中指定的存储是否存在
         *
         * @param String
         *            key
         * @param String
         *            fieid 存储的名字
         * @return 1存在，0不存在
         */
        public boolean hexists(String key, String fieid) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            boolean s = sjedis.hexists(key, fieid);
            sjedis.close();
            return s;
        }

        /**
         * 返回hash中指定存储位置的值
         *
         * @param String
         *            key
         * @param String
         *            fieid 存储的名字
         * @return 存储对应的值
         */
        public String hget(String key, String fieid) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            String s = sjedis.hget(key, fieid);
            sjedis.close();
            return s;
        }

        public byte[] hget(byte[] key, byte[] fieid) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            byte[] s = sjedis.hget(key, fieid);
            sjedis.close();
            return s;
        }

        /**
         * 以Map的形式返回hash中的存储和值
         *
         * @param String
         *            key
         * @return Map<Strinig,String>
         */
        public Map<String, String> hgetAll(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            Map<String, String> map = sjedis.hgetAll(key);
            sjedis.close();
            return map;
        }

        /**
         * 添加一个对应关系
         *
         * @param String
         *            key
         * @param String
         *            fieid
         * @param String
         *            value
         * @return 状态码 1成功，0失败，fieid已存在将更新，也返回0
         **/
        public long hset(String key, String fieid, String value) {
            Jedis jedis = getJedis();
            long s = jedis.hset(key, fieid, value);
            jedis.close();
            return s;
        }

        public long hset(String key, String fieid, byte[] value) {
            Jedis jedis = getJedis();
            long s = jedis.hset(key.getBytes(), fieid.getBytes(), value);
            jedis.close();
            return s;
        }

        /**
         * 添加对应关系，只有在fieid不存在时才执行
         *
         * @param String
         *            key
         * @param String
         *            fieid
         * @param String
         *            value
         * @return 状态码 1成功，0失败fieid已存
         **/
        public long hsetnx(String key, String fieid, String value) {
            Jedis jedis = getJedis();
            long s = jedis.hsetnx(key, fieid, value);
            jedis.close();
            return s;
        }

        /**
         * 获取hash中value的集合
         *
         * @param String
         *            key
         * @return List<String>
         */
        public List<String> hvals(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            List<String> list = sjedis.hvals(key);
            sjedis.close();
            return list;
        }

        /**
         * 在指定的存储位置加上指定的数字，存储位置的值必须可转为数字类型
         *
         * @param String
         *            key
         * @param String
         *            fieid 存储位置
         * @param String
         *            long value 要增加的值,可以是负数
         * @return 增加指定数字后，存储位置的值
         */
        public long hincrby(String key, String fieid, long value) {
            Jedis jedis = getJedis();
            long s = jedis.hincrBy(key, fieid, value);
            jedis.close();
            return s;
        }

        /**
         * 返回指定hash中的所有存储名字,类似Map中的keySet方法
         *
         * @param String
         *            key
         * @return Set<String> 存储名称的集合
         */
        public Set<String> hkeys(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            Set<String> set = sjedis.hkeys(key);
            sjedis.close();
            return set;
        }

        /**
         * 获取hash中存储的个数，类似Map中size方法
         *
         * @param String
         *            key
         * @return long 存储的个数
         */
        public long hlen(String key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            long len = sjedis.hlen(key);
            sjedis.close();
            return len;
        }

        /**
         * 根据多个key，获取对应的value，返回List,如果指定的key不存在,List对应位置为null
         *
         * @param String
         *            key
         * @param String
         *            ... fieids 存储位置
         * @return List<String>
         */
        public List<String> hmget(String key, String... fieids) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            List<String> list = sjedis.hmget(key, fieids);
            sjedis.close();
            return list;
        }

        public List<byte[]> hmget(byte[] key, byte[]... fieids) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            List<byte[]> list = sjedis.hmget(key, fieids);
            sjedis.close();
            return list;
        }

        /**
         * 添加对应关系，如果对应关系已存在，则覆盖
         *
         * @param Strin
         *            key
         * @param Map
         *            <String,String> 对应关系
         * @return 状态，成功返回OK
         */
        public String hmset(String key, Map<String, String> map) {
            Jedis jedis = getJedis();
            String s = jedis.hmset(key, map);
            jedis.close();
            return s;
        }

        /**
         * 添加对应关系，如果对应关系已存在，则覆盖
         *
         * @param Strin
         *            key
         * @param Map
         *            <String,String> 对应关系
         * @return 状态，成功返回OK
         */
        public String hmset(byte[] key, Map<byte[], byte[]> map) {
            Jedis jedis = getJedis();
            String s = jedis.hmset(key, map);
            jedis.close();
            return s;
        }

    }

    // *******************************************Lists*******************************************//
    public class Lists {
        /**
         * List长度
         *
         * @param String
         *            key
         * @return 长度
         */
        public long llen(String key) {
            return llen(SafeEncoder.encode(key));
        }

        /**
         * List长度
         *
         * @param byte[]
         *            key
         * @return 长度
         */
        public long llen(byte[] key) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            long count = sjedis.llen(key);
            sjedis.close();
            return count;
        }

        /**
         * 覆盖操作,将覆盖List中指定位置的值
         *
         * @param byte[]
         *            key
         * @param int
         *            index 位置
         * @param byte[]
         *            value 值
         * @return 状态码
         */
        public String lset(byte[] key, int index, byte[] value) {
            Jedis jedis = getJedis();
            String status = jedis.lset(key, index, value);
            jedis.close();
            return status;
        }

        /**
         * 覆盖操作,将覆盖List中指定位置的值
         *
         * @param key
         * @param int
         *            index 位置
         * @param String
         *            value 值
         * @return 状态码
         */
        public String lset(String key, int index, String value) {
            return lset(SafeEncoder.encode(key), index, SafeEncoder.encode(value));
        }

        /**
         * 在value的相对位置插入记录
         *
         * @param key
         * @param LIST_POSITION
         *            前面插入或后面插入
         * @param String
         *            pivot 相对位置的内容
         * @param String
         *            value 插入的内容
         * @return 记录总数
         */
        public long linsert(String key, LIST_POSITION where, String pivot, String value) {
            return linsert(SafeEncoder.encode(key), where, SafeEncoder.encode(pivot), SafeEncoder.encode(value));
        }

        /**
         * 在指定位置插入记录
         *
         * @param String
         *            key
         * @param LIST_POSITION
         *            前面插入或后面插入
         * @param byte[]
         *            pivot 相对位置的内容
         * @param byte[]
         *            value 插入的内容
         * @return 记录总数
         */
        public long linsert(byte[] key, LIST_POSITION where, byte[] pivot, byte[] value) {
            Jedis jedis = getJedis();
            long count = jedis.linsert(key, where, pivot, value);
            jedis.close();
            return count;
        }

        /**
         * 获取List中指定位置的值
         *
         * @param String
         *            key
         * @param int
         *            index 位置
         * @return 值
         **/
        public String lindex(String key, int index) {
            return SafeEncoder.encode(lindex(SafeEncoder.encode(key), index));
        }

        /**
         * 获取List中指定位置的值
         *
         * @param byte[]
         *            key
         * @param int
         *            index 位置
         * @return 值
         **/
        public byte[] lindex(byte[] key, int index) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            byte[] value = sjedis.lindex(key, index);
            sjedis.close();
            return value;
        }

        /**
         * 将List中的第一条记录移出List
         *
         * @param String
         *            key
         * @return 移出的记录
         */
        public String lpop(String key) {
            return SafeEncoder.encode(lpop(SafeEncoder.encode(key)));
        }

        /**
         * 将List中的第一条记录移出List
         *
         * @param byte[]
         *            key
         * @return 移出的记录
         */
        public byte[] lpop(byte[] key) {
            Jedis jedis = getJedis();
            byte[] value = jedis.lpop(key);
            jedis.close();
            return value;
        }

        /**
         * 将List中最后第一条记录移出List
         *
         * @param byte[]
         *            key
         * @return 移出的记录
         */
        public String rpop(String key) {
            Jedis jedis = getJedis();
            String value = jedis.rpop(key);
            jedis.close();
            return value;
        }

        /**
         * 向List尾部追加记录
         *
         * @param String
         *            key
         * @param String
         *            value
         * @return 记录总数
         */
        public long lpush(String key, String value) {
            return lpush(SafeEncoder.encode(key), SafeEncoder.encode(value));
        }

        /**
         * 向List头部追加记录
         *
         * @param String
         *            key
         * @param String
         *            value
         * @return 记录总数
         */
        public long rpush(String key, String value) {
            Jedis jedis = getJedis();
            long count = jedis.rpush(key, value);
            jedis.close();
            return count;
        }

        /**
         * 向List头部追加记录
         *
         * @param String
         *            key
         * @param String
         *            value
         * @return 记录总数
         */
        public long rpush(byte[] key, byte[] value) {
            Jedis jedis = getJedis();
            long count = jedis.rpush(key, value);
            jedis.close();
            return count;
        }

        /**
         * 向List中追加记录
         *
         * @param byte[]
         *            key
         * @param byte[]
         *            value
         * @return 记录总数
         */
        public long lpush(byte[] key, byte[] value) {
            Jedis jedis = getJedis();
            long count = jedis.lpush(key, value);
            jedis.close();
            return count;
        }

        /**
         * 获取指定范围的记录，可以做为分页使用
         *
         * @param String
         *            key
         * @param long
         *            start
         * @param long
         *            end
         * @return List
         */
        public List<String> lrange(String key, long start, long end) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            List<String> list = sjedis.lrange(key, start, end);
            sjedis.close();
            return list;
        }

        /**
         * 获取指定范围的记录，可以做为分页使用
         *
         * @param byte[]
         *            key
         * @param int
         *            start
         * @param int
         *            end 如果为负数，则尾部开始计算
         * @return List
         */
        public List<byte[]> lrange(byte[] key, int start, int end) {
            // ShardedJedis sjedis = getShardedJedis();
            Jedis sjedis = getJedis();
            List<byte[]> list = sjedis.lrange(key, start, end);
            sjedis.close();
            return list;
        }

        /**
         * 删除List中c条记录，被删除的记录值为value
         *
         * @param byte[]
         *            key
         * @param int
         *            c 要删除的数量，如果为负数则从List的尾部检查并删除符合的记录
         * @param byte[]
         *            value 要匹配的值
         * @return 删除后的List中的记录数
         */
        public long lrem(byte[] key, int c, byte[] value) {
            Jedis jedis = getJedis();
            long count = jedis.lrem(key, c, value);
            jedis.close();
            return count;
        }

        /**
         * 删除List中c条记录，被删除的记录值为value
         *
         * @param String
         *            key
         * @param int
         *            c 要删除的数量，如果为负数则从List的尾部检查并删除符合的记录
         * @param String
         *            value 要匹配的值
         * @return 删除后的List中的记录数
         */
        public long lrem(String key, int c, String value) {
            return lrem(SafeEncoder.encode(key), c, SafeEncoder.encode(value));
        }

        /**
         * 算是删除吧，只保留start与end之间的记录
         *
         * @param byte[]
         *            key
         * @param int
         *            start 记录的开始位置(0表示第一条记录)
         * @param int
         *            end 记录的结束位置（如果为-1则表示最后一个，-2，-3以此类推）
         * @return 执行状态码
         */
        public String ltrim(byte[] key, int start, int end) {
            Jedis jedis = getJedis();
            String str = jedis.ltrim(key, start, end);
            jedis.close();
            return str;
        }

        /**
         * 算是删除吧，只保留start与end之间的记录
         *
         * @param String
         *            key
         * @param int
         *            start 记录的开始位置(0表示第一条记录)
         * @param int
         *            end 记录的结束位置（如果为-1则表示最后一个，-2，-3以此类推）
         * @return 执行状态码
         */
        public String ltrim(String key, int start, int end) {
            return ltrim(SafeEncoder.encode(key), start, end);
        }
    }

}

下面先在redis.conf里面改改配置,把安全模式改成no：

然后重启redis：

package com.ouyan.o2o.service.impl;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ouyan.o2o.cache.JedisUtil;
import com.ouyan.o2o.dao.AreaDao;
import com.ouyan.o2o.entity.Area;
import com.ouyan.o2o.exceptions.AreaOperationException;
import com.ouyan.o2o.service.AreaService;

@Service
public class AreaServiceImpl implements AreaService {
    @Autowired
    private AreaDao areaDao;
    @Autowired
    private JedisUtil.Keys jedisKeys;
    @Autowired
    private JedisUtil.Strings jedisStrings;

    private static String AREALISTKEY="arealist";
    private static Logger logger = LoggerFactory.getLogger(AreaServiceImpl.class);

    @Override
    @Transactional
    public List<Area> getAreaList() {
        // 定义redis的key
        String key = AREALISTKEY;
        // 定义接收对象
        List<Area> areaList = null;
        // 定义jackson数据转换操作类
        ObjectMapper mapper = new ObjectMapper();
        // 判断key是否存在
        if (!jedisKeys.exists(key)) {
            // 若不存在，则从数据库里面取出相应数据
            areaList = areaDao.queryArea();
            // 将相关的实体类集合转换成string,存入redis里面对应的key中
            String jsonString;
            try {
                jsonString = mapper.writeValueAsString(areaList);
            } catch (JsonProcessingException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new AreaOperationException(e.getMessage());
            }
            jedisStrings.set(key, jsonString);
        } else {
            // 若存在，则直接从redis里面取出相应数据
            String jsonString = jedisStrings.get(key);
            // 指定要将string转换成的集合类型
            JavaType javaType = mapper.getTypeFactory().constructParametricType(ArrayList.class, Area.class);
            try {
                // 将相关key对应的value里的的string转换成对象的实体类集合
                areaList = mapper.readValue(jsonString, javaType);
            } catch (JsonParseException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new AreaOperationException(e.getMessage());
            } catch (JsonMappingException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new AreaOperationException(e.getMessage());
            } catch (IOException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new AreaOperationException(e.getMessage());
            }
        }
        return areaList;
    }

}

package com.ouyan.o2o.exceptions;

public class AreaOperationException extends RuntimeException {

    /**
     *
     */
    private static final long serialVersionUID = -1512771573934050550L;

    public AreaOperationException(String msg) {
        super(msg);
    }
}

package com.ouyan.o2o.service;

import static org.junit.Assert.assertEquals;

import java.util.List;

import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;

import com.ouyan.o2o.BaseTest;
import com.ouyan.o2o.entity.Area;

public class AreaServiceTest extends BaseTest {
    @Autowired
    private AreaService areaService;
    @Autowired
    private CacheService cacheService;

    @Test
    public void testGetAreaList() {
        List<Area> areaList = areaService.getAreaList();
        assertEquals("西苑", areaList.get(0).getAreaName());
    }
}

package com.ouyan.o2o;

import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

/**
 * 配置spring和junit整合，junit启动时加载springIOC容器
 * @author think
 *
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath:spring/spring-dao.xml","classpath:spring/spring-service.xml","classpath:spring/spring-redis.xml"})
public class BaseTest {

}

package com.ouyan.o2o.service.impl;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ouyan.o2o.cache.JedisUtil;
import com.ouyan.o2o.dao.ShopCategoryDao;
import com.ouyan.o2o.entity.ShopCategory;
import com.ouyan.o2o.exceptions.ShopCategoryOperationException;
import com.ouyan.o2o.service.ShopCategoryService;

@Service
public class ShopCategoryServiceImpl implements ShopCategoryService {

    @Autowired
    private ShopCategoryDao shopCategoryDao;
    @Autowired
    private JedisUtil.Keys jedisKeys;
    @Autowired
    private JedisUtil.Strings jedisStrings;

    private static Logger logger = LoggerFactory.getLogger(ShopCategoryServiceImpl.class);

    @Override
    public List<ShopCategory> getShopCategoryList(ShopCategory shopCategoryCondition) {
        // 定义redis的key前缀
        String key = SCLISTKEY;
        // 定义接收对象
        List<ShopCategory> shopCategoryList = null;
        // 定义jackson数据转换操作类
        ObjectMapper mapper = new ObjectMapper();
        // 拼接出redis的key
        if (shopCategoryCondition == null) {
            // 若查询条件为空，则列出所有首页大类，即parentId为空的店铺类别
            key = key + "_allfirstlevel";
        } else if (shopCategoryCondition != null && shopCategoryCondition.getParent() != null
                && shopCategoryCondition.getParent().getShopCategoryId() != null) {
            // 若parentId为非空，则列出该parentId下的所有子类别
            key = key + "_parent" + shopCategoryCondition.getParent().getShopCategoryId();
        } else if (shopCategoryCondition != null) {
            // 列出所有子类别，不管其属于哪个类，都列出来
            key = key + "_allsecondlevel";
        }
        // 判断key是否存在
        if (!jedisKeys.exists(key)) {
            // 若不存在，则从数据库里面取出相应数据
            shopCategoryList = shopCategoryDao.queryShopCategory(shopCategoryCondition);
            // 将相关的实体类集合转换成string,存入redis里面对应的key中
            String jsonString;
            try {
                jsonString = mapper.writeValueAsString(shopCategoryList);
            } catch (JsonProcessingException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new ShopCategoryOperationException(e.getMessage());
            }
            jedisStrings.set(key, jsonString);
        } else {
            // 若存在，则直接从redis里面取出相应数据
            String jsonString = jedisStrings.get(key);
            // 指定要将string转换成的集合类型
            JavaType javaType = mapper.getTypeFactory().constructParametricType(ArrayList.class, ShopCategory.class);
            try {
                // 将相关key对应的value里的的string转换成对象的实体类集合
                shopCategoryList = mapper.readValue(jsonString, javaType);
            } catch (JsonParseException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new ShopCategoryOperationException(e.getMessage());
            } catch (JsonMappingException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new ShopCategoryOperationException(e.getMessage());
            } catch (IOException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new ShopCategoryOperationException(e.getMessage());
            }
        }
        return shopCategoryDao.queryShopCategory(shopCategoryCondition);
    }

}

package com.ouyan.o2o.service.impl;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ouyan.o2o.cache.JedisUtil;
import com.ouyan.o2o.dao.HeadLineDao;
import com.ouyan.o2o.entity.HeadLine;
import com.ouyan.o2o.exceptions.HeadLineOperationException;
import com.ouyan.o2o.service.HeadLineService;

@Service
public class HeadLineServiceImpl implements HeadLineService {
    @Autowired
    private HeadLineDao headLineDao;
    @Autowired
    private JedisUtil.Keys jedisKeys;
    @Autowired
    private JedisUtil.Strings jedisStrings;

    private static Logger logger = LoggerFactory.getLogger(HeadLineServiceImpl.class);

    @Override
    @Transactional
    public List<HeadLine> getHeadLineList(HeadLine headLineCondition) {
        // 定义redis的key前缀
        String key = HLLISTKEY;
        // 定义接收对象
        List<HeadLine> headLineList = null;
        // 定义jackson数据转换操作类
        ObjectMapper mapper = new ObjectMapper();
        // 拼接出redis的key
        if (headLineCondition != null && headLineCondition.getEnableStatus() != null) {
            key = key + "_" + headLineCondition.getEnableStatus();
        }
        // 判断key是否存在
        if (!jedisKeys.exists(key)) {
            // 若不存在，则从数据库里面取出相应数据
            headLineList = headLineDao.queryHeadLine(headLineCondition);
            // 将相关的实体类集合转换成string,存入redis里面对应的key中
            String jsonString;
            try {
                jsonString = mapper.writeValueAsString(headLineList);
            } catch (JsonProcessingException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new HeadLineOperationException(e.getMessage());
            }
            jedisStrings.set(key, jsonString);
        } else {
            // 若存在，则直接从redis里面取出相应数据
            String jsonString = jedisStrings.get(key);
            // 指定要将string转换成的集合类型
            JavaType javaType = mapper.getTypeFactory().constructParametricType(ArrayList.class, HeadLine.class);
            try {
                // 将相关key对应的value里的的string转换成对象的实体类集合
                headLineList = mapper.readValue(jsonString, javaType);
            } catch (JsonParseException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new HeadLineOperationException(e.getMessage());
            } catch (JsonMappingException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new HeadLineOperationException(e.getMessage());
            } catch (IOException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new HeadLineOperationException(e.getMessage());
            }
        }
        return headLineList;
    }
}

package com.ouyan.o2o.exceptions;

public class HeadLineOperationException extends RuntimeException {

    /**
     *
     */
    private static final long serialVersionUID = -6866853564850051110L;

    public HeadLineOperationException(String msg) {
        super(msg);
    }
}

package com.ouyan.o2o.exceptions;

public class ShopCategoryOperationException extends RuntimeException {

    /**
     *
     */
    private static final long serialVersionUID = 5423986306645291467L;

    public ShopCategoryOperationException(String msg) {
        super(msg);
    }
}

package com.ouyan.o2o.service.impl;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ouyan.o2o.cache.JedisUtil;
import com.ouyan.o2o.dao.AreaDao;
import com.ouyan.o2o.entity.Area;
import com.ouyan.o2o.exceptions.AreaOperationException;
import com.ouyan.o2o.service.AreaService;

@Service
public class AreaServiceImpl implements AreaService {
    @Autowired
    private AreaDao areaDao;
    @Autowired
    private JedisUtil.Keys jedisKeys;
    @Autowired
    private JedisUtil.Strings jedisStrings;

    private static Logger logger = LoggerFactory.getLogger(AreaServiceImpl.class);

    @Override
    @Transactional
    public List<Area> getAreaList() {
        // 定义redis的key
        String key = AREALISTKEY;
        // 定义接收对象
        List<Area> areaList = null;
        // 定义jackson数据转换操作类
        ObjectMapper mapper = new ObjectMapper();
        // 判断key是否存在
        if (!jedisKeys.exists(key)) {
            // 若不存在，则从数据库里面取出相应数据
            areaList = areaDao.queryArea();
            // 将相关的实体类集合转换成string,存入redis里面对应的key中
            String jsonString;
            try {
                jsonString = mapper.writeValueAsString(areaList);
            } catch (JsonProcessingException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new AreaOperationException(e.getMessage());
            }
            jedisStrings.set(key, jsonString);
        } else {
            // 若存在，则直接从redis里面取出相应数据
            String jsonString = jedisStrings.get(key);
            // 指定要将string转换成的集合类型
            JavaType javaType = mapper.getTypeFactory().constructParametricType(ArrayList.class, Area.class);
            try {
                // 将相关key对应的value里的的string转换成对象的实体类集合
                areaList = mapper.readValue(jsonString, javaType);
            } catch (JsonParseException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new AreaOperationException(e.getMessage());
            } catch (JsonMappingException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new AreaOperationException(e.getMessage());
            } catch (IOException e) {
                e.printStackTrace();
                logger.error(e.getMessage());
                throw new AreaOperationException(e.getMessage());
            }
        }
        return areaList;
    }

}

package com.ouyan.o2o.service;

import java.util.List;

import com.ouyan.o2o.entity.Area;

public interface AreaService {
    public static final String AREALISTKEY="arealist";

    List<Area> getAreaList();
}

package com.ouyan.o2o.service;

import java.util.List;

import com.ouyan.o2o.entity.ShopCategory;

public interface ShopCategoryService {
    public static final String SCLISTKEY="shopcategorylist";

    /**
     * 根据查询条件获取shopCategory列表
     * @param shopCategoryCondition
     * @return
     */
    List<ShopCategory> getShopCategoryList(ShopCategory shopCategoryCondition);
}

package com.ouyan.o2o.service;

public interface CacheService {
    /**
     * 依据key前缀删除匹配该模式下的所有key-value 如传入:shopcategory,则shopcategory_allfirstlevel等
     * 以shopcategory打头的key_value都会被清空
     *
     * @param keyPrefix
     * @return
     */
    void removeFromCache(String keyPrefix);
}

package com.ouyan.o2o.service.impl;

import java.util.Set;

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

import com.ouyan.o2o.cache.JedisUtil;
import com.ouyan.o2o.service.CacheService;

@Service
public class CacheServiceImpl implements CacheService {
    @Autowired
    private JedisUtil.Keys jedisKeys;

    @Override
    public void removeFromCache(String keyPrefix) {
        Set<String> keySet = jedisKeys.keys(keyPrefix + "*");
        for (String key : keySet) {
            jedisKeys.del(key);
        }
    }

}

package com.ouyan.o2o.service;

import static org.junit.Assert.assertEquals;

import java.util.List;

import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;

import com.ouyan.o2o.BaseTest;
import com.ouyan.o2o.entity.Area;

public class AreaServiceTest extends BaseTest {
    @Autowired
    private AreaService areaService;
    @Autowired
    private CacheService cacheService;

    @Test
    public void testGetAreaList() {
        List<Area> areaList = areaService.getAreaList();
        assertEquals("西苑", areaList.get(0).getAreaName());
        cacheService.removeFromCache(areaService.AREALISTKEY);
        areaList = areaService.getAreaList();
    }
}