Question

我正在尝试登录示例。在控制器类中，我使用addError方法来显示错误。当我输入无效条目时，它会转到错误页面，但不会显示该消息。访问页面正常工作。

LoginController.java

@Controller
public class LoginController {

    @Autowired
    private LoginService loginService;

    @RequestMapping("login.html")
    public String toLogin(Model model) {
        Login login = new Login(); 
        model.addAttribute("login",login);
        return "login";
    }

    @RequestMapping(value ="login.html", method = RequestMethod.POST)
    public ModelAndView  doLogin(@Valid @ModelAttribute ("login") Login login, 
            BindingResult bindingresult ) {
         ModelAndView view = new ModelAndView("login");
        if(!bindingresult.hasErrors()){
            if(!loginService.authenticateUser(login)){
                bindingresult.addError(new ObjectError("invalid", "Invalid Credentials"));
                return new ModelAndView("error");
            }
            else{
                view.setViewName("success");
            }
        }

         return view;

    }
}

error.jsp文件

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>LoginExample2-Error</title>
</head>
<body>


<table>
<tr>
<td><a href="login.html">Retry</a></td>
</tr>
</table>

</body>
</html>

addError不返回错误消息

0 个答案: