强制刷新OSCache中的缓存（CacheFilter）-优快云博客

本文介绍如何使用OSCache在Web应用中实现页面缓存。通过配置filter设置缓存时间为600秒，并指定缓存作用范围为application级别。此外，还提供了清除缓存的方法。

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用OSCache缓存Web页面

<filter>
		<filter-name>cacheFilter</filter-name>
		<filter-class>com.opensymphony.oscache.web.filter.CacheFilter</filter-class>
		<init-param>
			<param-name>time</param-name>
			<param-value>600</param-value>
		</init-param>
		<init-param>
			<param-name>scope</param-name>
			<param-value>application</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>cacheFilter</filter-name>
		<url-pattern>/index.do</url-pattern>
		<url-pattern>/index.shtml</url-pattern>
	</filter-mapping>

后台画面可用如下代码强制刷新


import javax.servlet.jsp.PageContext;
import com.opensymphony.oscache.base.Cache;
import com.opensymphony.oscache.web.ServletCacheAdministrator;

		Cache cache = ServletCacheAdministrator.getInstance(request.getSession().getServletContext()).getCache(request,
				PageContext.APPLICATION_SCOPE);
		cache.flushAll(new Date());
// Scope为Session时的处理
// Cache cache = ServletCacheAdministrator.getInstance(request.getSession(true).getServletContext()).getCache(request, PageContext.SESSION_SCOPE);