如何使用ModelAndview將Model（bean）值從控制器傳遞到JSP頁面？

Question

我正在創建Spring mvc登錄應用程序，因此在注冊或登錄時，我只是得到$ {attributename}（在我的情況下為$ {firstname}），而沒有在Welcome JSP中的實際屬性值。 請讓我知道我的代碼有什么問題。 Userbean和Welcome JSP具有相同的名字。

LoginController ：

    @Controller
public class LoginController {

    @Autowired
    private UserService userService;
    @GetMapping ("/login")
    public ModelAndView login(HttpServletRequest request, HttpServletResponse response){
        ModelAndView mav = new ModelAndView("login");
        mav.addObject("login",new Login());
        return mav;

    }

    @PostMapping(value = "/loginProcess")
    public ModelAndView loginProcess(Model model, HttpServletRequest request, HttpServletResponse response, @ModelAttribute("login") Login login){
         ModelAndView mav = null;
        User user = userService.validateUser(login);
        if(user!=null){
            mav= new ModelAndView("welcome");
            System.out.println("user.getFirstname(): "+user.getFirstname());             
            mav.addObject("firstname", user.getFirstname());
            //model.addAttribute("firstname", "welcome"+user.getFirstname());


        }
        else

            mav = new ModelAndView("login");
        mav.addObject("error", "Username or password is wrong");
        return mav;


    }

}

登錄jsp：

 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ 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>login</title>
</head>
<body>
<form:form id="loginForm" modelAttribute="login" action="loginProcess" method="post">
                <table align="center">
                    <tr>
                        <td>
                            <form:label path="username">Username: </form:label>
                        </td>
                        <td>
                            <form:input path="username" name="username" id="username" />
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <form:label path="password">Password:</form:label>
                        </td>
                        <td>
                            <form:password path="password" name="password" id="password" />
                        </td>
                    </tr>
                    <tr>
                        <td></td>
                        <td align="left">
                            <form:button id="login" name="login">Login</form:button>
                        </td>
                    </tr>
                    <tr></tr>
                    <tr>
                        <td></td>
                        <td><a href="home.jsp">Home</a>
                        </td>
                    </tr>
                </table>
            </form:form>
            <table align="center">
                <tr>

             <td style="font-style: italic; color: red;">${param.message}</td>
                </tr>
            </table>
</body>
</html>

的welcome.jsp

<%@ 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>Welcome</title>
</head>
<body>
    <table>
        <tr>
            <td> ${firstname}</td>
        </tr>
        <tr>
        </tr>
        <tr>
        </tr>
        <tr>
            <td><a href="home.jsp">Home</a>
            </td>
        </tr>
    </table>
</body>
</html>

的UserBean：

public class User {

      private String username;
      private String password;
      private String firstname;
      private String lastname;
      private String email;
      private String address;
      private int phone;
 //getter, setter
}

Answer 1

您能否在jsp頁面中對此進行修改？

    <tr>
        <td> "${firstname}"</td>
    </tr>

剛剛添加了雙引號。 還添加

<%@ page isELIgnored="false" %>

這到您的JSP文件。

如何使用ModelAndview將Model（bean）值從控制器傳遞到JSP頁面？

問題描述

1 個解決方案

解決方案1
1 已采納 2019-01-10 07:47:44

如何使用ModelAndview將Model（bean）值從控制器傳遞到JSP頁面？

問題描述

1 個解決方案

解決方案1 1 已采納 2019-01-10 07:47:44

解決方案1
1 已采納 2019-01-10 07:47:44