Question

当用户点击退出页面时，它会将他带到login.xhtml.Now当用户点击后退按钮时它会在退出之前将他带到页面，我试图通过使用doFilter来避免这种情况在许多帖子中都提到过，我的代码是：

    HttpServletRequest request = (HttpServletRequest) req;
    HttpServletResponse response = (HttpServletResponse) res;
    response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); 
    response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
    response.setDateHeader("Expires", 0); // Proxies.
    chain.doFilter(req, res);

但它没有用。我还在一篇文章中读到，如果URL有http，那么它不起作用？你能否建议我如何避免这种行为，并让用户在退出后点击后退按钮进入登录页面。

Answer 1

我不知道你的问题的原因是什么，但请注意，在你的网页过滤器中，你应该以任何方式跳过JSF资源，所有.xhtml页面中的后续过滤器都可以使用

import java.io.IOException;
import javax.faces.application.ResourceHandler;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet Filter implementation class NoCacheFilter
 */
  @WebFilter(urlPatterns = {"*.xhtml"})
  public class NoCacheFilter implements Filter {

/**
 * Default constructor. 
 */
public NoCacheFilter() {
    // TODO Auto-generated constructor stub
}

/**
 * @see Filter#destroy()
 */
public void destroy() {
    // TODO Auto-generated method stub
}

/**
 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
 */

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    HttpServletRequest req = (HttpServletRequest) request;
    HttpServletResponse res = (HttpServletResponse) response;

    if (!req.getRequestURI().startsWith(req.getContextPath() + ResourceHandler.RESOURCE_IDENTIFIER)) { // Skip JSF resources (CSS/JS/Images/etc)
        res.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
        res.setHeader("Pragma", "no-cache"); // HTTP 1.0.
        res.setDateHeader("Expires", 0); // Proxies.
    }

    chain.doFilter(request, response);
}
/**
 * @see Filter#init(FilterConfig)
 */
public void init(FilterConfig fConfig) throws ServletException {
    // TODO Auto-generated method stub
}

}

用户在JSF注销后单击后退按钮时，重定向到登录页面

1 个答案: