Guava Cache缓存的使用

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/ITw333/article/details/82831322

TokenCache   --使用Guava Cache的存取Token的缓存（手机验证码、忘记密码）

public class TokenCache {

    private static Logger logger = LoggerFactory.getLogger(TokenCache.class);
    public static final String TOKEN_PREFIX = "token_";

    //LRU算法
    private static LoadingCache<String,String> localCache = CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000).expireAfterAccess(12, TimeUnit.HOURS)
            .build(new CacheLoader<String, String>() {
                //默认的数据加载实现,当调用get取值的时候,如果key没有对应的值,就调用这个方法进行加载.
                @Override
                public String load(String s) throws Exception {
                    return "null";
                }
            });

    public static void setKey(String key,String value){
        localCache.put(key,value);
    }

    public static String getKey(String key){
        String value = null;
        try {
            value = localCache.get(key);
            if("null".equals(value)){
                return null;
            }
            return value;
        }catch (Exception e){
            logger.error("localCache get error",e);
        }
        return null;
    }
}

 

 

例子：忘记密码

忘记密码时检查问题答案：

忘记密码重置密码之前需要检查问题答案，成成token