rdis 缓存

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@Servicepublic class NoticeServiceImpl implements NoticeService{@Autowiredprivate NoticeMapper noticeMapper;@Autowiredprivate RedisService redisService;private static final StringHOTS = "HOTS";/** 查询不同新闻类型下的新闻资讯 */public List<New> queryNewsByNewType(String NewType,Integer Count) {   if (NewType.equals(types)) { //先命中       String jsonData = this.redisService.get(HOTS);       if (!StringUtils.isEmpty(jsonData)) {           //命中           try {           List<New> list = MAPPER.readValue(jsonData,List.class);               return list;           } catch (Exception e) {               e.printStackTrace();           }       }   List<New> list = noticeMapper.queryNewsByNewType(NewType, Count); //加入redis缓存中       try {           this.redisService.setExpire(HOTS, MAPPER.writeValueAsString(list), 60*60*24);       } catch (Exception e) {           e.printStackTrace();       }       return list;   }      List<New> list = noticeMapper.queryNewsByNewType(NewType, Count);       return list;}}package com.qiantufax.manage.service.impl;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.qiantufax.manage.service.Function;import com.qiantufax.manage.service.RedisService;import redis.clients.jedis.ShardedJedis;import redis.clients.jedis.ShardedJedisPool;@Servicepublic class RedisServiceImpl implements RedisService{        @Autowired(required = false)//使用到时才注册该对象    private ShardedJedisPool shardedJedisPool;        /**     * 执行set     * @return      */    public <T> T excute(Function<ShardedJedis, T> fun){        ShardedJedis shardedJedis = null;        try {            // 从连接池中获取到jedis分片对象            shardedJedis = shardedJedisPool.getResource();            return fun.callback(shardedJedis);        } catch (Exception e) {            e.printStackTrace();        } finally {            if (null != shardedJedis) {                // 关闭，检测连接是否有效，有效则放回到连接池中，无效则重置状态                shardedJedis.close();            }        }        return null;    }        /**     * 执行set     */    public String set(final String key,final String value){        return this.excute(new Function<ShardedJedis, String>() {            @Override            public String callback(ShardedJedis e) {                return e.set(key, value);            }        });    }        /**     * 执行get     */    public String get(final String key){        return  this.excute(new Function<ShardedJedis, String>() {            @Override            public String callback(ShardedJedis e) {                return e.get(key);            }        });    }        /**     * 设置生存时间     */    public Long expire(final String key,final Integer seconds){        return this.excute(new Function<ShardedJedis, Long>(){            @Override            public Long callback(ShardedJedis e) {                Long expire = e.expire(key, seconds);                return expire;            }                    });    }        /**     * 设置key和value并设置生存时间     */    public Long setExpire(final String key,final String value,final Integer seconds){        return this.excute(new Function<ShardedJedis, Long>(){            @Override            public Long callback(ShardedJedis e) {                e.set(key, value);                return e.expire(key, seconds);            }                    });    }        /**     * 删除键     */    public Long del(final String key){        return this.excute(new Function<ShardedJedis, Long>(){            @Override            public Long callback(ShardedJedis e) {                return e.del(key);            }                });    }    }
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