java - session 变量未在 Spring 中设置

Question

我有一个 Spring Controller ，它将一个变量放入 session 中:

public class LoginFormController extends SimpleFormController {

    public ModelAndView onSubmit(HttpServletRequest request, 
            HttpServletResponse response, Object command) throws Exception {

            request.getSession().setAttribute("authenticated_user", "authenticated_user");
    }
}

然后我有一个 HandlerInterceptor。在 preHandle 方法中，我检查 session 中的变量:

public boolean preHandle(HttpServletRequest request,
                                      HttpServletResponse response,
                                      Object handler) throws Exception {

        /* first, check if the requested view even required authentication */
        if (isAuthenticationRequired(request)) {

            /* check to see that user is logged in */
            if (null == request.getSession().getAttribute("authenticated_user")) {
                forwardToLogonPage(request, response);
                return false;
            }
            /* all is ok - pass the request on */
            return true;
        }
        /* all is ok - pass the request on */
        return true;
    }

问题是似乎没有设置 session 变量，因为 request.getSession().getAttribute("authenticated_user")) 总是解析为 null。

有什么想法吗？

谢谢，Krt_马耳他

Answer 1

尝试 throw new ModelAndViewDefiningException(new ModelAndView("logonPage")) 而不是 return false。

然后在您的登录页面中，在表单标记中明确包含操作，如下所示:

<form:form method="post" commandName="login" action="logonPage.htm">