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package cn.toher.filter; import cn.toher.bean.User; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; /** * * * @date 2015-4-28 15:30:52 */
public class LoginFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest servletRequest = (HttpServletRequest) request; HttpServletResponse servletResponse = (HttpServletResponse) response; HttpSession session = servletRequest.getSession(); User user = (User)session.getAttribute("Suser");
// 过滤session是不是为空，为空则remove一下，然后跳到登录界面 if(user!=null){ chain.doFilter(request, response); }else{ session.removeAttribute("Suser"); PrintWriter out = servletResponse.getWriter(); out.print("<script language='javascript'>"); out.print("top.location.href='/index.jsp?error=timeout';"); out.print("</script>"); } } @Override public void destroy() { } }
过滤*.do的文件
