import com.google.common.cache.Cache;import com.google.common.cache.CacheBuilder;import com.google.common.cache.RemovalListener;import com.google.common.cache.RemovalNotification;import org.apache.commons.lang3.StringUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.util.List;import java.util.Objects;import java.util.concurrent.TimeUnit;/** * guava cache * */public class LocalCacheUtils {    private static final Logger log = LoggerFactory.getLogger(LocalCacheUtils.class);    /**     * 使用google guava缓存处理     */    private static Cache
    
      cache;    static {        cache = CacheBuilder.newBuilder().maximumSize(10000).expireAfterWrite(24, TimeUnit.HOURS).initialCapacity(10)                .removalListener(new RemovalListener
     
      () {                    @Override                    public void onRemoval(RemovalNotification
      
        rn) {                        if (log.isInfoEnabled()) {                            log.info("被移除缓存{}:{}", rn.getKey(), rn.getValue());                        }                    }                }).build();    }    /**     * 是否存在     *      * @param key     * @return     */    public static boolean isExist(String key) {        if (StringUtils.isBlank(key)) {            return false;        }        return Objects.isNull(cache.getIfPresent(key)) ? false : true;    }    /**     * 获取缓存     *      * @param key     * @return     */    public static String get(String key) {        return StringUtils.isNotEmpty(key) ? String.valueOf(cache.getIfPresent(key)) : null;    }    /**     * 放入缓存     *      * @param key     * @param value     */    public static void put(String key, String value) {        if (StringUtils.isNotEmpty(key) && value != null) {            cache.put(key, value);        }    }    /**     * 移除缓存     *      * @param key     */    public static void remove(String key) {        if (StringUtils.isNotEmpty(key)) {            cache.invalidate(key);        }    }    /**     * 批量删除缓存     *      * @param keys     */    public static void removeBatch(List
       
         keys) {        if (keys != null && keys.size() > 0) {            cache.invalidateAll(keys);        }    }}复制代码