spring的Cache注解和redis的区别说明

<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.9.0</version>
</dependency>
<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-redis</artifactId>
    <version>1.6.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.3.2</version>
</dependency>

xmlns:cache="http://www.springframework.org/schema/cache"
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache-4.2.xsd"
<cache:annotation-driven cache-manager="cacheManager" /> //这句话一定要加上，要不注解不管用

<bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
    <property name="caches">
        <set>
            <bean class="com.zswy.mkedu.utils.RedisCache"> 
                <property name="redisTemplate" ref="redisTemplate" />
                <!--name一定要与你注解那个方法中value一样，否则找不到-->
                <property name="name" value="courseCache" />
            </bean>
        </set>
    </property>
</bean>

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;
    }
 
    public String getName() {
        return this.name;
    }
 
    public Object getNativeCache() {
        return this.redisTemplate;
    }
 
    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[] t = name.getBytes();
                byte[] value = connection.hGet(t, key);
                if (value == null) {
                    return null;
                }
                return toObject(value);
            }
        });
        ValueWrapper obj=(object != null ? new SimpleValueWrapper(object) : null);
        return obj;
    }
 
    public <T> T get(Object o, Class<T> aClass) {
        return null;
    }
 
    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);
                byte[] t = name.getBytes();
                connection.hSet(t, keyb, valueb);
                if (liveTime > 0) {
                    connection.expire(keyb, liveTime);
                }
                return 1L;
            }
        });
    }
 
    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;
    }
 
    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;
    }
 
    public ValueWrapper putIfAbsent(Object o, Object o1) {
        return null;
    }
 
    public void evict(Object key) {
        final String keyf = (String) key;
        redisTemplate.execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection)
                    throws DataAccessException {
                return connection.hDel(name.getBytes(), keyf.getBytes());
            }
        });
    }
 
    public void clear() {
        // 清楚缓存，需要根据Cache的name属性，在redis中模糊查询相关key值的集合，并全部删除
        redisTemplate.execute(new RedisCallback<String>() {
            public String doInRedis(RedisConnection connection)
                    throws DataAccessException {
                byte[] t = name.getBytes();
                Set<byte[]> fields = connection.hKeys(t);
                for (byte[] bs : fields) {
                    connection.hDel(t, bs);
                }
                return "ok";
            }
        });
    }
}