Java使用Google Guava缓存

引言

使用Google Guava实现定时缓存功能

Maven仓库地址

<!--高效缓存-->
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>${google-guava.version}</version>
</dependency>

创建 CacheManager.java

private static CacheBuilder<Object, Object> cacheBuilder = CacheBuilder.newBuilder()
            .expireAfterWrite(NumberUtils.INTEGER_TWO, TimeUnit.DAYS)
            .initialCapacity(10)
            .maximumSize(2000);

private static Cache<String, Object> cache;

static{
    cache = cacheBuilder.build();
}

/**
 * 添加缓存
 * @param key key
 * @param value 值
 */
public static void set(String key, Object value) {
    cache.put(key,value);
}

/**
 * 根据key取得缓存对象
 * @param key key
 * @return 结果
 */
public static Object get(String key) {
    return cache.getIfPresent(key);
}

/**
 * 删除缓存
 * @param key key
 */
public static void del(String key){
    cache.invalidate(key);
}

/**
 * 判断key值是否存在
 * @param key key
 * @return 结果
 */
public static Boolean containsKey(String key) {
    return cache.getIfPresent(key) == null ? Boolean.FALSE : Boolean.TRUE;
}

后记

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