java - Spring Security如何检索用户名

Question

Possible Duplicate:
When using Spring Security, what is the proper way to obtain current username (i.e. SecurityContext) information in a bean?

我正在使用 spring security，我想知道如何检索 Controller 中当前登录的用户名。我可以将与登录用户名关联的用户 ID 存储在某处吗？ 目前我正在从 Prciple 对象获取用户名

public boolean populateUserName(ModelMap model, Principal principal) {
    if (principal != null) {
        String name = principal.getName();
        model.addAttribute("username", name);
        System.out.println("userName - " + name);
        return true;
    }
    else
    {
        System.out.println("principal is null");
        return false;
    }
}

我在每个 Controller 方法中都得到了这个Principal对象。我不知道这是否是获得它的最佳方式。例如，这是代码

@RequestMapping(value = "/secure/myitem.htm", method = RequestMethod.GET)
public ModelAndView showItem(@RequestParam("listingId") String listingId,
        ModelMap model, Principal principal) {
    populateUserName(model, principal);
    }

Answer 1

SecurityContextHolder.getContext().getAuthentication().getName()

另外，可能是重复的:When using Spring Security, what is the proper way to obtain current username (i.e. SecurityContext) information in a bean?