Java 緩存組件，Ehcache 2.5.4 發布

Ehcache 2.5.4 發布，下載地址：ehcache-2.5.4-distribution.tar.gz (66.7 MB)。

The major new capability of Ehcache 2.5 is enhanced cache resource management, specifically the ability to set the maximum size in bytes of a Cache or CacheManager. This offers the following additional benefits to Ehcache users:

• Ease of use. Tuning cache sizes is now as simple as setting the maximum number of bytes. No more setting maximum entry counts and juggling eviction parameters to approximate the maximum amount of system memory your cache can use.
• Greater efficiency. Ehcache now efficiently manages caches based on their memory footprint and can dynamically balance their resource use based on runtime size information.

EhCache 是一個純Java的進程內緩存框架，具有快速、精干等特點，是Hibernate中默認的CacheProvider。

主要的特性有：

1. 快速.
2. 簡單.
3. 多種緩存策略
4. 緩存數據有兩級：內存和磁盤，因此無需擔心容量問題
5. 緩存數據會在虛擬機重啟的過程中寫入磁盤
6. 可以通過RMI、可插入API等方式進行分布式緩存
7. 具有緩存和緩存管理器的偵聽接口
8. 支持多緩存管理器實例，以及一個實例的多個緩存區域
9. 提供Hibernate的緩存實現
10. 等等