过滤器只过滤page文件夹下的jsp，一旦没有登陆而访问则跳转回index.jsp
当我在浏览器输入http://localhost:8080/weibodemo/page/homepage.jsp的时候
页面出现的是
HTTP Status 404 - /weibodemo/page/index.jsp
Filter代码
public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain)throws IOException,ServletException{
HttpServletRequest req=(HttpServletRequest) request;
HttpSession ses=req.getSession();
if(ses.getAttribute("uesrid")!=null){
chain.doFilter(request, response);
}else{
request.getRequestDispatcher("index.jsp").forward(request,response); }
}
xml配置
<filter>
<filter-name>LoginFilter</filter-name>
<filter-class>weibodemo.filter</filter-class>
</filter>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<url-pattern>/page/*</url-pattern>
</filter-mapping>
