JAVA WEB过滤器设置浏览器缓存

最近在工作中对一个开源框架进行二次开发，发现在浏览器运行哪些静态资源浏览器是不缓存的，找了好久都没有找到设置的地方，只好自食其力，用Java的过滤器设置过期时间，详情且看代码。

public class ResponseFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        HttpServletResponse res = (HttpServletResponse) response;
        Date date = new Date();

        //设置缓存周期为一个小时
        Long cacheCycle = (long) (60 * 60 * 1000);

        Long time = date.getTime() + cacheCycle;

        //Last-Modified:页面的最后生成时间
        res.setDateHeader("Last-Modified", date.getTime());

        //Expires:过时期限值
        res.setDateHeader("Expires", time);

        //Cache-Control来控制页面的缓存与否,public:浏览器和缓存server都能够缓存页面信息
        res.setHeader("Cache-Control", "public");

        //Pragma:设置页面是否缓存，为Pragma则缓存，no-cache则不缓存
        res.setHeader("Pragma", "Pragma");

        chain.doFilter(request, res);

    }

    @Override
    public void destroy() {

    }
}

 

web.xml配置，可自行配置

<filter>
   <filter-name>ResponseFilter</filter-name>
   <filter-class>art.zzc.filter.ResponseFilter</filter-class>
</filter>
<filter-mapping>
   <filter-name>ResponseFilter</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>