springmvc 使用filter过滤的时候放置出现循环条

来源：互联网发布：边境杀手知乎编辑：程序博客网时间：2024/06/07 23:00

在web.xml中配置了如下的filter:

<filter>    <filter-name>LoginFilter</filter-name>    <filter-class>user.filter.LoginFilter</filter-class></filter><filter-mapping>    <filter-name>LoginFilter</filter-name>    <url-pattern>/main/*.html</url-pattern></filter-mapping>

@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws ServletException, IOException {    System.out.println("filter======doFilter");    //进行用户是否登录的验证    HttpServletRequest request=(HttpServletRequest)servletRequest;    HttpServletResponse response  =(HttpServletResponse) servletResponse;    HttpSession session = request.getSession(true);    String user_name = (String)session.getAttribute("name");//登录人角色    String user_password = (String)session.getAttribute("password");    String url=request.getRequestURI();    if(user_name==null || "".equals(user_password) || user_password == null || "".equals(user_name)) {        if(url!=null && !url.equals("") ) {            response.sendRedirect(request.getContextPath() + "/login/login.html");            return;        }    }    filterChain.doFilter(servletRequest, servletResponse);//再次转发请求    return;}
如果用户没登录，则会出现循环跳转。
为此，可以将登录页面和其他页面分开成两个文件夹，这个filter只过滤其中一个就可以了

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