轻量级的缓存框架，可在Android和Java项目中用于频繁数据的缓存，以下为示例：
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DiskWithMemoryCache:
GCache cache = Builders.newBuilder()
.withTranscoder(new StringTranscoder())
.withCacheRootDirectory(new File("diskCache"))
.maxDiskUsageBytes(10000)
.maxMemoryUsageBytes(1000)
.defaultCacheTime(50)
.build();
MemoryCache:
GCache cache = Builders.newBuilderForMemory()
.withTranscoder(new StringTranscoder())
.maxMemoryUsageBytes(10000)
.defaultCacheTime(20)
.build();
DiskBasedCache:
GCache cache = Builders.newBuilderForDisk()
.withTranscoder(new StringTranscoder())
.withCacheRootDirectory(new File("diskCache"))
.maxDiskUsageBytes(1000)
.defaultCacheTime(50)
.build();
cache.put(K, V); //use defaultCacheTime
cache.put(K, V, TTL);
cache.get(K);