java：springboot自带缓存和redis缓存

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springboot自带缓存（不支持配置失效时间）：

 

redis缓存：

 

使用到的工具类：

package com.huayong.bi.web.util;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.*;
import org.springframework.stereotype.Service;

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

/**
 * Created by Administrator on 2017/12/1.
 */
@Service
public class RedisService {

    @Autowired
    private RedisTemplate redisTemplate;
    /**
     * 写入缓存
     * @param key
     * @param value
     * @return
     */
    public boolean set(final String key, Object value) {
        boolean result = false;
        try {
            ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
            operations.set(key, value);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
    /**
     * 写入缓存设置时效时间
     * @param key
     * @param value
     * @return
     */
    public boolean set(String key, Object value, Long expireTime) {
        boolean result = false;
        try {
            ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
            operations.set(key, value);
            redisTemplate.expire(key, expireTime, TimeUnit.SECONDS);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
    /**
     * 批量删除对应的value
     * @param keys
     */
    public void remove(final String... keys) {
        for (String key : keys) {
            remove(key);
        }
    }

    /**
     * 批量删除key
     * @param pattern
     */
    public void removePattern(final String pattern) {
        Set<Serializable> keys = redisTemplate.keys(pattern);
        if (keys.size() > 0)
            redisTemplate.delete(keys);
    }
    /**
     * 删除对应的value
     * @param key
     */
    public void remove(final String key) {
        if (exists(key)) {
            redisTemplate.delete(key);
        }
    }
    /**
     * 判断缓存中是否有对应的value
     * @param key
     * @return
     */
    public boolean exists(final String key) {
        return redisTemplate.hasKey(key);
    }
    /**
     * 读取缓存
     * @param key
     * @return
     */
    public Object get(final String key) {
        Object result = null;
        ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue();
        result = operations.get(key);
        return result;
    }
    /**
     * 哈希获取数据
     * @param key
     * @param hashKey
     * @return
     */
    public Map<String,String> hmGet(String key){
    	Map<String,String> resultMap= redisTemplate.opsForHash().entries(key);
        return resultMap ;
    }
    /**
     * 哈希 添加
     * @param key
     * @param hashKey
     * @param value
     */
    public void hmSet(String key, Object hashKey, Object value){
        HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
        hash.put(key,hashKey,value);
    }

    /**
     * 哈希获取数据
     * @param key
     * @param hashKey
     * @return
     */
    public Object hmGet(String key, Object hashKey){
        HashOperations<String, Object, Object> hash = redisTemplate.opsForHash();
        return hash.get(key,hashKey);
    }

    /**
     * 列表添加
     * @param k
     * @param v
     */
    public void lPush(String k,Object v){
        ListOperations<String, Object> list = redisTemplate.opsForList();
        list.rightPush(k,v);
    }

    /**
     * 列表获取
     * @param k
     * @param l
     * @param l1
     * @return
     */
    public List<Object> lRange(String k, long l, long l1){
        ListOperations<String, Object> list = redisTemplate.opsForList();
        return list.range(k,l,l1);
    }
    
    /** 
     * 栈/队列长 
     * @param key 
     * @return 
     */  
    public Long length(String key) {  
        return redisTemplate.opsForList().size(key);  
    }  
  

    /**
     * 集合添加
     * @param key
     * @param value
     */
    public void add(String key,Object value){
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        set.add(key,value);
    }

    /**
     * 集合获取
     * @param key
     * @return
     */
    public Set<Object> setMembers(String key){
        SetOperations<String, Object> set = redisTemplate.opsForSet();
        return set.members(key);
    }

    /**
     * 有序集合添加
     * @param key
     * @param value
     * @param scoure
     */
    public void zAdd(String key,Object value,double scoure){
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        zset.add(key,value,scoure);
    }

    /**
     * 有序集合获取
     * @param key
     * @param scoure
     * @param scoure1
     * @return
     */
    public Set<Object> rangeByScore(String key,double scoure,double scoure1){
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        return zset.rangeByScore(key, scoure, scoure1);
    }
}

 key：

package com.huayong.bi.inter.constants;

/**
 * redis Key 的前缀
 */
public enum EmumRedisKeyPre {
    avg_year_curr_position("AVG_YEAR_CURR_POSITION_","Redis*******对应key的前缀");

    private String keyPre ;
    private String keyNmae ;

    EmumRedisKeyPre(String keyPre, String keyNmae) {
        this.keyPre = keyPre;
        this.keyNmae = keyNmae;
    }

    public String getKeyPre() {
        return keyPre;
    }

    public void setKeyPre(String keyPre) {
        this.keyPre = keyPre;
    }

    public String getKeyNmae() {
        return keyNmae;
    }

    public void setKeyNmae(String keyNmae) {
        this.keyNmae = keyNmae;
    }
}

查询过期时间：

连接linux，进入redis客户端连接

1.keys * 查询出你的key

2.调用一下接口，我这里设置的为36s失效

 3.查询一下，可以看到失效时间倒计时的效果

3. -2代表过期

4.可以看到缓存中有的话，不会再查询数据库

get：

get "\xac\xed\x00\x05t\x00&AVG_YEAR_CURR_POSITION_2019-01-zhilian"