1

当用户单击注销页面时，它会将他带到 login.xhtml。现在，当用户单击后退按钮时，它会将他带到注销前的页面，我试图通过使用中提到的 doFilter 来避免这种情况很多帖子，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);

但它不起作用。我还在一篇文章中读到，如果 URL 有 http，那么它不起作用？您能否建议我如何避免这种行为并让用户在注销后单击后退按钮时转到登录页面。

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1 回答 1

1

我不知道您的问题的原因是什么，但请注意，在您的 Web 过滤器中，您应该以任何方式跳过 JSF 资源，以下过滤器在所有 .xhtml 页面中都为我工作尝试一下

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
}

}

于 2013-09-26T17:20:29.450 回答