自定义javax.servlet.Filter过滤器的实现

一、 web.xml的配置

<filter>
<filter-name>sessionTimeoutFilter</filter-name>
<filter-class>
com.huawei.aaa.portal.filter.SessionTimeOutFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>sessionTimeoutFilter</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>

<filter-mapping>
<filter-name>sessionTimeoutFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>

二、 SessionTimeOutFilter的实现

package com.test.filter;

public class SessionTimeOutFilter implements Filter
{
   
    public void destroy()
    {
        // TODO Auto-generated method stub
       
    }
   
    public void doFilter(ServletRequest arg0, ServletResponse arg1,
            FilterChain arg2) throws IOException, ServletException
    {
        // TODO Auto-generated method stub
        HttpServletRequest request = (HttpServletRequest) arg0;
        HttpServletResponse response = (HttpServletResponse) arg1;
        HttpSession session = request.getSession();
        String contextPath = request.getContextPath();
        String url = request.getRequestURI();
        arg2.doFilter(request, response);
    }
   
    public void init(FilterConfig arg0) throws ServletException
    {
        // TODO Auto-generated method stub
       
    }
   
}