[英]How to redirect to error page in JSF when FacesContext session attribute is not found
[英]How to redirect a jsf page to home page if session does not exist
我正在创建一个JSF应用程序,该应用程序已在主页面中嵌入了一个applet。 我的问题是我无法弄清楚如何在将applet加载到主页之前检查会话是否存在,并且如果该会话不存在,我想将用户重定向到主页
我建议使用过滤器:
public class LoggedFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
HttpSession session = httpServletRequest.getSession(false);
if (session == null) {
HttpServletResponse httpServletResponse = (HttpServletResponse) response;
httpServletResponse.sendRedirect(httpServletResponse.encodeRedirectURL(httpServletRequest.getContextPath() + "/"));
} else {
chain.doFilter(request, response);
}
}
当然,将此过滤器映射到web.xml
所有JSF页面:
<filter>
<filter-name>LoggedFilter</filter-name>
<filter-class>LoggedFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>LoggedFilter</filter-name>
<url-pattern>*.xhtml</url-pattern>
</filter-mapping>
(我假设JSF页面的后缀为xhtml)
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