session time out

来源：互联网发布：mac input method 编辑：程序博客网时间：2024/05/24 02:37

第一步，配置过滤。

   <filter>
  <filter-name>accessControl</filter-name>
   <filter-class>com.chgr.util.AccessControlFilter</filter-class>
   <init-param>
     <param-name>sessionOut</param-name>
     <param-value>/pages/session_out.jsp</param-value>
   </init-param>
</filter>
<filter-mapping>
      <filter-name>accessControl</filter-name>
   <url-pattern>*.do</url-pattern>
</filter-mapping>

第二步，创建过滤器类

public class AccessControlFilter implements Filter {

protected FilterConfig filterConfig;
private String sessionOut;

public void destroy() {

}

public void doFilter(ServletRequest arg0, ServletResponse arg1,
   FilterChain arg2) throws IOException, ServletException {
  HttpServletRequest request = (HttpServletRequest)arg0;
  HttpServletResponse response = (HttpServletResponse)arg1;
  if(Util.isLogin(request) || (request.getRequestURI() != null && request.getRequestURI().equals("/as400/login.do"))){
   arg2.doFilter(request, response);
    } else {
      response.sendRedirect(sessionOut);
    }
}

public void init(FilterConfig arg0) throws ServletException {
  this.filterConfig = arg0;
  sessionOut= filterConfig.getInitParameter("sessionOut");;
  if (sessionOut == null){
     throw new ServletException("loginPage init param missing");
  }
}

}