package cn.org.xinke.util;
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import java.util.Date;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* @description 缓存工具类
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* @author cinco
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* @date 2019-1-24
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*/
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public class CacheUtil {
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/** 数据缓存map */
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public static Map<String, Object> dataMap = new ConcurrentHashMap<>();
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/** 数据缓存过期map */
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public static Map<String, Date> dataExpireMap = new ConcurrentHashMap<>();
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/**
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* 将一个key、value值放入内存缓存,并设置过期分钟数
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*
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* @param key
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* @param val
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* @param expireMiute
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*/
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public static void put(String key, Object val, int expireMiute) {
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dataMap.put(key, val);
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dataExpireMap.put(key, addMinutes(expireMiute));
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}
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/**
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* 从缓存中获取一个key的数据,若过期返回null
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*
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* @param cacheKey
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* @return
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*/
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public static Object get(String cacheKey) {
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Object obj = null;
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Date expireDate = CacheUtil.dataExpireMap.get(cacheKey);
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if (expireDate != null && expireDate.compareTo(new Date()) > 0) {
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obj = CacheUtil.dataMap.get(cacheKey);
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}
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return obj;
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}
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/**
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* 将有效时间(分钟)转成日期
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*
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* @param expireMiute
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* @return Date
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*/
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public static Date addMinutes(int expireMiute){
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long currentTime = System.currentTimeMillis();
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currentTime += expireMiute * 1000 * 60;
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Date date = new Date(currentTime);
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return date;
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}
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}
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