检验session过期问题处理

最新推荐文章于 2024-03-24 20:04:16 发布

原创最新推荐文章于 2024-03-24 20:04:16 发布 · 1.7k 阅读

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CC 4.0 BY-SA版权

本文介绍了一种基于SpringMVC的会话过滤器(SessionFilter)实现方式，该过滤器能够检查用户是否已登录，未登录的用户将被重定向到登录页面。通过在web.xml中配置，可以对特定URL模式进行过滤。

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public class SessionFilter extends OncePerRequestFilter {
    
        @Override
    protected void doFilterInternal(HttpServletRequest request,
        HttpServletResponse response, FilterChain filterChain)
        throws ServletException, IOException {
        HttpSession session = request.getSession();
        String url = request.getRequestURI();
        Object user = session.getAttribute("user");
        if (user == null && !url.endsWith("login/check.html")) {
            request.getRequestDispatcher("/login.html").forward(request, response);
        } else {
            filterChain.doFilter(request, response);
        }
    }
}

在web.xml中添加对应的filter即可

 <filter>  
        <filter-name>sessionFilter</filter-name>  
        <filter-class>fire.filter.SessionFilter</filter-class>  
    </filter>  
    <filter-mapping>  
        <filter-name>sessionFilter</filter-name>  
        <url-pattern>*.html</url-pattern>  
    </filter-mapping>