spring 会话错误 [无法公开会话属性“用户”；因为存在同名的模型对象]
您好，我收到以下错误
javax.servlet.ServletException: Cannot expose session attribute 'user' because of an existing model object of the same name
org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:141)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
代码
@Controller
@RequestMapping("/admin")
@SessionAttributes("user")
public class AdminHome {
@RequestMapping("home")
public String homePage(HttpSession session, ModelMap map) {
map.addAttribute(org.brahmaa.ads.util.impl.UserInfo.getPrincipal(session));
return "admin/home";
}
}
Hi i am getting following error
javax.servlet.ServletException: Cannot expose session attribute 'user' because of an existing model object of the same name
org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:141)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
Code
@Controller
@RequestMapping("/admin")
@SessionAttributes("user")
public class AdminHome {
@RequestMapping("home")
public String homePage(HttpSession session, ModelMap map) {
map.addAttribute(org.brahmaa.ads.util.impl.UserInfo.getPrincipal(session));
return "admin/home";
}
}
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评论（3）
我在 spring-boot 中使用这个属性
I use property this in spring-boot
据我了解，
map.addAttribute(org.brahmaa.ads.util.impl.UserInfo.getPrincipal(session));从会话中提取user属性并将其放入模型中。@SessionAttriubtes指示 Spring 自动执行相同的操作。因此他们发生冲突。您应该只使用这些方法中的一种，而不是同时使用两种方法。As far as I understand,
map.addAttribute(org.brahmaa.ads.util.impl.UserInfo.getPrincipal(session));extracts theuserattribute from the session and puts it into model.@SessionAttriubtesinstructs Spring to do the same automatically. Therefore they conflicts. You should use only one of these approaches, not both simultaneously.我也突然遇到了这个异常。结果我添加了这个 Freemarker 属性：
I suddenly got this exception as well. Turns out I had added this Freemarker property: