SpringBoot 使用RedisTemplate操作Redis

新版：

import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.SetOperations;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.data.redis.core.ZSetOperations;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

@Component
public class RedisUtil {

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;
    @Autowired
    private ValueOperations<String, String> valueOperations;
    @Autowired
    private HashOperations<String, String, Object> hashOperations;
    @Autowired
    private ListOperations<String, Object> listOperations;
    @Autowired
    private SetOperations<String, Object> setOperations;
    @Autowired
    private ZSetOperations<String, Object> zSetOperations;

    //=============================common============================
    /**
     * 指定缓存失效时间
     * @param key 键
     * @param time 时间(秒)
     * @return
     */
    public boolean expire(String key,long time){
        try {
            if(time>0){
                redisTemplate.expire(key, time, TimeUnit.SECONDS);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 根据key 获取过期时间
     * @param key 键 不能为null
     * @return 时间(秒) 返回0代表为永久有效
     */
    public long getExpire(String key){
        return redisTemplate.getExpire(key,TimeUnit.SECONDS);
    }

    /**
     * 判断key是否存在
     * @param key 键
     * @return true 存在 false不存在
     */
    public boolean hasKey(String key){
        try {
            return redisTemplate.hasKey(key);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 删除缓存
     * @param key 可以传一个值 或多个
     */
    @SuppressWarnings("unchecked")
    public void del(String ... key){
        if(key!=null&&key.length>0){
            if(key.length==1){
                redisTemplate.delete(key[0]);
            }else{
                redisTemplate.delete(CollectionUtils.arrayToList(key));
            }
        }
    }

    //============================String=============================
    /**
     * 普通缓存获取
     * @param key 键
     * @return 值
     */
    public Object get(String key){
        return key==null?null:valueOperations.get(key);
    }

    /**
     * 普通缓存放入
     * @param key 键
     * @param value 值
     * @return true成功 false失败
     */
    public boolean set(String key,Object value) {
        try {
            valueOperations.set(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }

    }

    /**
     * 普通缓存放入并设置时间
     * @param key 键
     * @param value 值
     * @param time 时间(秒) time要大于0 如果time小于等于0 将设置无限期
     * @return true成功 false 失败
     */
    public boolean set(String key,Object value,long time){
        try {
            if(time>0){
                valueOperations.set(key, value, time, TimeUnit.SECONDS);
            }else{
                set(key, value);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 递增
     * @param key 键
     * @param by 要增加几(大于0)
     * @return
     */
    public long incr(String key, long delta){
        if(delta<0){
            throw new RuntimeException("递增因子必须大于0");
        }
        return valueOperations.increment(key, delta);
    }

    /**
     * 递减
     * @param key 键
     * @param by 要减少几(小于0)
     * @return
     */
    public long decr(String key, long delta){
        if(delta<0){
            throw new RuntimeException("递减因子必须大于0");
        }
        return valueOperations.increment(key, -delta);
    }

    //================================Map=================================
    /**
     * HashGet
     * @param key 键 不能为null
     * @param item 项 不能为null
     * @return 值
     */
    public Object hget(String key,String item){
        return hashOperations.get(key, item);
    }

    /**
     * 获取hashKey对应的所有键值
     * @param key 键
     * @return 对应的多个键值
     */
    public Map<Object,Object> hmget(String key){
        return hashOperations.entries(key);
    }

    /**
     * HashSet
     * @param key 键
     * @param map 对应多个键值
     * @return true 成功 false 失败
     */
    public boolean hmset(String key, Map<String,Object> map){
        try {
            hashOperations.putAll(key, map);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * HashSet 并设置时间
     * @param key 键
     * @param map 对应多个键值
     * @param time 时间(秒)
     * @return true成功 false失败
     */
    public boolean hmset(String key, Map<String,Object> map, long time){
        try {
            hashOperations.putAll(key, map);
            if(time>0){
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 向一张hash表中放入数据,如果不存在将创建
     * @param key 键
     * @param item 项
     * @param value 值
     * @return true 成功 false失败
     */
    public boolean hset(String key,String item,Object value) {
        try {
            hashOperations.put(key, item, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 向一张hash表中放入数据,如果不存在将创建
     * @param key 键
     * @param item 项
     * @param value 值
     * @param time 时间(秒)  注意:如果已存在的hash表有时间,这里将会替换原有的时间
     * @return true 成功 false失败
     */
    public boolean hset(String key,String item,Object value,long time) {
        try {
            hashOperations.put(key, item, value);
            if(time>0){
                expire(key, time);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 删除hash表中的值
     * @param key 键 不能为null
     * @param item 项 可以使多个 不能为null
     */
    public void hdel(String key, Object... item){
        hashOperations.delete(key,item);
    }

    /**
     * 判断hash表中是否有该项的值
     * @param key 键 不能为null
     * @param item 项 不能为null
     * @return true 存在 false不存在
     */
    public boolean hHasKey(String key, String item){
        return hashOperations.hasKey(key, item);
    }

    /**
     * hash递增 如果不存在,就会创建一个 并把新增后的值返回
     * @param key 键
     * @param item 项
     * @param by 要增加几(大于0)
     * @return
     */
    public double hincr(String key, String item,double by){
        return hashOperations.increment(key, item, by);
    }

    /**
     * hash递减
     * @param key 键
     * @param item 项
     * @param by 要减少记(小于0)
     * @return
     */
    public double hdecr(String key, String item,double by){
        return hashOperations.increment(key, item,-by);
    }

    //============================set=============================
    /**
     * 根据key获取Set中的所有值
     * @param key 键
     * @return
     */
    public Set<Object> sGet(String key){
        try {
            return setOperations.members(key);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 根据value从一个set中查询,是否存在
     * @param key 键
     * @param value 值
     * @return true 存在 false不存在
     */
    public boolean sHasKey(String key,Object value){
        try {
            return setOperations.isMember(key, value);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 将数据放入set缓存
     * @param key 键
     * @param values 值 可以是多个
     * @return 成功个数
     */
    public long sSet(String key, Object...values) {
        try {
            return setOperations.add(key, values);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 将set数据放入缓存
     * @param key 键
     * @param time 时间(秒)
     * @param values 值 可以是多个
     * @return 成功个数
     */
    public long sSetAndTime(String key,long time,Object...values) {
        try {
            Long count = setOperations.add(key, values);
            if(time>0) expire(key, time);
            return count;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 获取set缓存的长度
     * @param key 键
     * @return
     */
    public long sGetSetSize(String key){
        try {
            return setOperations.size(key);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 移除值为value的
     * @param key 键
     * @param values 值 可以是多个
     * @return 移除的个数
     */
    public long setRemove(String key, Object ...values) {
        try {
            Long count = setOperations.remove(key, values);
            return count;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
    //===============================list=================================

    /**
     * 获取list缓存的内容
     * @param key 键
     * @param start 开始
     * @param end 结束  0 到 -1代表所有值
     * @return
     */
    public List<Object> lGet(String key, long start, long end){
        try {
            return listOperations.range(key, start, end);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 获取list缓存的所有内容
     * @param key
     * @return
     */
    public List<Object> lGetAll(String key){
        return lGet(key,0,-1);
    }

    /**
     * 获取list缓存的长度
     * @param key 键
     * @return
     */
    public long lGetListSize(String key){
        try {
            return listOperations.size(key);
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }

    /**
     * 通过索引 获取list中的值
     * @param key 键
     * @param index 索引  index>=0时， 0 表头，1 第二个元素，依次类推；index<0时，-1，表尾，-2倒数第二个元素，依次类推
     * @return
     */
    public Object lGetIndex(String key,long index){
        try {
            return listOperations.index(key, index);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 将list放入缓存
     * @param key 键
     * @param value 值
     * @param time 时间(秒)
     * @return
     */
    public boolean lSet(String key, Object value) {
        try {
            listOperations.rightPush(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 将list放入缓存
     * @param key 键
     * @param value 值
     * @param time 时间(秒)
     * @return
     */
    public boolean lSet(String key, Object value, long time) {
        try {
            listOperations.rightPush(key, value);
            if (time > 0) expire(key, time);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 将list放入缓存
     * @param key 键
     * @param value 值
     * @param time 时间(秒)
     * @return
     */
    public boolean lSet(String key, List<Object> value) {
        try {
            listOperations.rightPushAll(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 将list放入缓存
     * @param key 键
     * @param value 值
     * @param time 时间(秒)
     * @return
     */
    public boolean lSet(String key, List<Object> value, long time) {
        try {
            listOperations.rightPushAll(key, value);
            if (time > 0) expire(key, time);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 根据索引修改list中的某条数据
     * @param key 键
     * @param index 索引
     * @param value 值
     * @return
     */
    public boolean lUpdateIndex(String key, long index,Object value) {
        try {
            listOperations.set(key, index, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 移除N个值为value
     * @param key 键
     * @param count 移除多少个
     * @param value 值
     * @return 移除的个数
     */
    public long lRemove(String key,long count,Object value) {
        try {
            Long remove = listOperations.remove(key, count, value);
            return remove;
        } catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
}

RedisConfig:

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.SetOperations;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.data.redis.core.ZSetOperations;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
public class RedisConfig {
    @Autowired
    private RedisConnectionFactory factory;

    @Bean
    public RedisTemplate<String, Object> redisTemplate() {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
        template.setConnectionFactory(factory);
        template.setKeySerializer(new StringRedisSerializer());
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.setHashKeySerializer(jackson2JsonRedisSerializer);
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        template.setDefaultSerializer(new StringRedisSerializer());
        template.afterPropertiesSet();
        return template;
    }

    @Bean
    public HashOperations<String, String, Object> hashOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForHash();
    }

    @Bean
    public ValueOperations<String, String> valueOperations(RedisTemplate<String, String> redisTemplate) {
        return redisTemplate.opsForValue();
    }

    @Bean
    public ListOperations<String, Object> listOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForList();
    }

    @Bean
    public SetOperations<String, Object> setOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForSet();
    }

    @Bean
    public ZSetOperations<String, Object> zSetOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForZSet();
    }
}

application.properties:

# REDIS (RedisProperties)
# Redis数据库索引（默认为0）
spring.redis.database=0
# Redis服务器地址
spring.redis.host=127.0.0.1
# Redis服务器连接端口
spring.redis.port=6379
# Redis服务器连接密码（默认为空）
spring.redis.password=
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.pool.max-active=8
# 连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.pool.min-idle=0
# 连接超时时间（毫秒）
spring.redis.timeout=0

 上面的例子还是有问题的

主要是RedisTemplate序列化问题

特别是在使用数组操作的时候

仅供参考学习

当然也可以使用其他方式解决这些序列化问题 ，就是转换成字符串，但是不喜欢

public class RedisCacheUtil {

    private static RedisTemplate<String, String> redisTemplate;

    public void setRedisTemplate(RedisTemplate<String, String> redisTemp) {
        redisTemplate = redisTemp;
    }

    /* ----------- common --------- */
    public static Collection<String> keys(String pattern) {
        return redisTemplate.keys(pattern);
    }

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

    public static void delete(Collection<String> key) {
        redisTemplate.delete(key);
    }

    /* ----------- string --------- */
    public static <T> T get(String key, Class<T> clazz) {
        String value = redisTemplate.opsForValue().get(key);
        return parseJson(value, clazz);
    }

    public static <T> List<T> mget(Collection<String> keys, Class<T> clazz) {
        List<String> values = redisTemplate.opsForValue().multiGet(keys);
        return parseJsonList(values, clazz);
    }

    public static <T> void set(String key, T obj, Long timeout, TimeUnit unit) {
        if (obj == null) {
            return;
        }

        String value = toJson(obj);
        if (timeout != null) {
            redisTemplate.opsForValue().set(key, value, timeout, unit);
        } else {
            redisTemplate.opsForValue().set(key, value);
        }
    }

    public static <T> T getAndSet(String key, T obj, Class<T> clazz) {
        if (obj == null) {
            return get(key, clazz);
        }

        String value = redisTemplate.opsForValue().getAndSet(key, toJson(obj));
        return parseJson(value, clazz);
    }

    public static int decrement(String key, int delta) {
        Long value = redisTemplate.opsForValue().increment(key, -delta);
        return value.intValue();
    }

    public static int increment(String key, int delta) {
        Long value = redisTemplate.opsForValue().increment(key, delta);
        return value.intValue();
    }

    /* ----------- list --------- */
    public static int size(String key) {
        return redisTemplate.opsForList().size(key).intValue();
    }

    public static <T> List<T> range(String key, long start, long end, Class<T> clazz) {
        List<String> list = redisTemplate.opsForList().range(key, start, end);
        return parseJsonList(list, clazz);
    }

    public static void rightPushAll(String key, Collection<?> values, Long timeout,
                                    TimeUnit unit) {
        if (values == null || values.isEmpty()) {
            return;
        }

        redisTemplate.opsForList().rightPushAll(key, toJsonList(values));
        if (timeout != null) {
            redisTemplate.expire(key, timeout, unit);
        }
    }

    public static <T> void leftPush(String key, T obj) {
        if (obj == null) {
            return;
        }

        redisTemplate.opsForList().leftPush(key, toJson(obj));
    }

    public static <T> T leftPop(String key, Class<T> clazz) {
        String value = redisTemplate.opsForList().leftPop(key);
        return parseJson(value, clazz);
    }

    public static void remove(String key, int count, Object obj) {
        if (obj == null) {
            return;
        }

        redisTemplate.opsForList().remove(key, count, toJson(obj));
    }

    /* ----------- zset --------- */
    public static int zcard(String key) {
        return redisTemplate.opsForZSet().zCard(key).intValue();
    }

    public static <T> List<T> zrange(String key, long start, long end, Class<T> clazz) {
        Set<String> set = redisTemplate.opsForZSet().range(key, start, end);
        return parseJsonList(setToList(set), clazz);
    }

    private static List<String> setToList(Set<String> set) {
        if (set == null) {
            return null;
        }
        return new ArrayList<String>(set);
    }

    public static void zadd(String key, Object obj, double score) {
        if (obj == null) {
            return;
        }
        redisTemplate.opsForZSet().add(key, toJson(obj), score);
    }

    public static void zaddAll(String key, List<TypedTuple<?>> tupleList, Long timeout, TimeUnit unit) {
        if (tupleList == null || tupleList.isEmpty()) {
            return;
        }

        Set<TypedTuple<String>> tupleSet = toTupleSet(tupleList);
        redisTemplate.opsForZSet().add(key, tupleSet);
        if (timeout != null) {
            redisTemplate.expire(key, timeout, unit);
        }
    }

    private static Set<TypedTuple<String>> toTupleSet(List<TypedTuple<?>> tupleList) {
        Set<TypedTuple<String>> tupleSet = new LinkedHashSet<TypedTuple<String>>();
        for (TypedTuple<?> t : tupleList) {
            tupleSet.add(new DefaultTypedTuple<String>(toJson(t.getValue()), t.getScore()));
        }
        return tupleSet;
    }

    public static void zrem(String key, Object obj) {
        if (obj == null) {
            return;
        }
        redisTemplate.opsForZSet().remove(key, toJson(obj));
    }

    public static void unionStore(String destKey, Collection<String> keys, Long timeout, TimeUnit unit) {
        if (keys == null || keys.isEmpty()) {
            return;
        }

        Object[] keyArr = keys.toArray();
        String key = (String) keyArr[0];

        Collection<String> otherKeys = new ArrayList<String>(keys.size() - 1);
        for (int i = 1; i < keyArr.length; i++) {
            otherKeys.add((String) keyArr[i]);
        }

        redisTemplate.opsForZSet().unionAndStore(key, otherKeys, destKey);
        if (timeout != null) {
            redisTemplate.expire(destKey, timeout, unit);
        }
    }

    /* ----------- tool methods --------- */
    public static String toJson(Object obj) {
        return JSON.toJSONString(obj, SerializerFeature.SortField);
    }

    public static <T> T parseJson(String json, Class<T> clazz) {
        return JSON.parseObject(json, clazz);
    }

    public static List<String> toJsonList(Collection<?> values) {
        if (values == null) {
            return null;
        }

        List<String> result = new ArrayList<String>();
        for (Object obj : values) {
            result.add(toJson(obj));
        }
        return result;
    }

    public static <T> List<T> parseJsonList(List<String> list, Class<T> clazz) {
        if (list == null) {
            return null;
        }

        List<T> result = new ArrayList<T>();
        for (String s : list) {
            result.add(parseJson(s, clazz));
        }
        return result;
    }
}

又一版本：

@Component
public class RedisCache {
    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    public RedisCache() {
    }

    public RedisTemplate<String, Object> getRedisTemplate() {
        return this.redisTemplate;
    }

    public void setRedisTemplate(RedisTemplate<String, Object> redisTemplate) {
        this.redisTemplate = redisTemplate;
    }

    public Object get(Object key) {
        final String keyf = key.toString();
        Object object = null;
        object = this.redisTemplate.execute(new RedisCallback<Object>() {
            public Object doInRedis(RedisConnection connection) throws DataAccessException {
                byte[] key = keyf.getBytes();
                byte[] value = connection.get(key);
                return value == null ? null : RedisCache.this.toObject(value);
            }
        });
        return object;
    }

    public void put(Object key, final Object value, final long liveTime) {
        final String keyf = key.toString();
        this.redisTemplate.execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection) throws DataAccessException {
                byte[] keyb = keyf.getBytes();
                byte[] valueb = RedisCache.this.toByteArray(value);
                connection.set(keyb, valueb);
                if (liveTime > 0L) {
                    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 var5) {
            var5.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 var5) {
            var5.printStackTrace();
        } catch (ClassNotFoundException var6) {
            var6.printStackTrace();
        }

        return obj;
    }

    public void del(Object key) {
        final String keyf = key.toString();
        this.redisTemplate.execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection) throws DataAccessException {
                return connection.del(new byte[][]{keyf.getBytes()});
            }
        });
    }

    public void exprie(Object key, final long liveTime) {
        final String keyf = key.toString();
        this.redisTemplate.execute(new RedisCallback<Boolean>() {
            public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
                return connection.expire(keyf.getBytes(), liveTime);
            }
        });
    }

    public Boolean exist(Object key) {
        final String keyf = key.toString();
        return (Boolean)this.redisTemplate.execute(new RedisCallback<Boolean>() {
            public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
                return connection.exists(keyf.getBytes());
            }
        });
    }

    public void clear() {
        this.redisTemplate.execute(new RedisCallback<String>() {
            public String doInRedis(RedisConnection connection) throws DataAccessException {
                connection.flushDb();
                return "ok";
            }
        });
    }

    public Long incr(Object key) {
        final String keyf = key.toString();
        return (Long)this.redisTemplate.execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection) throws DataAccessException {
                return connection.incr(keyf.getBytes());
            }
        });
    }

    public Long decr(Object key) {
        final String keyf = key.toString();
        return (Long)this.redisTemplate.execute(new RedisCallback<Long>() {
            public Long doInRedis(RedisConnection connection) throws DataAccessException {
                return connection.decr(keyf.getBytes());
            }
        });
    }

    public Set<String> keys(String key) {
        Set<String> keys = this.redisTemplate.keys(key);
        return keys;
    }
}

原文链接 http://www.cnblogs.com/hongdada/p/9141125.html