CacheBuilder本地缓存

前言

缓存是日常开发中经常应用到的一种技术手段，合理的利用缓存可以极大的改善应用程序的性能。

依赖

<dependency>
   <groupId>com.google.guava</groupId>
   <artifactId>guava</artifactId>
   <version>23.0</version>
</dependency>

开发

public static com.google.common.cache.CacheLoader<String, Employee> createCacheLoader() {
       return new com.google.common.cache.CacheLoader<String, Employee>() {
           @Override
           public Employee load(String key) throws Exception {
               log.info("加载创建key:" + key);
               return new Employee(key, key + "dept", key + "id");
           }
       };
  }
 LoadingCache<String, Employee> cache = CacheBuilder.newBuilder()
               .maximumSize(1000)
               .expireAfterAccess(30L, TimeUnit.MILLISECONDS)
               .build(createCacheLoader());

参考