Question

请帮我解决这个问题。下面是我的LoginController类，我从JSP传递用户名和密码，然后在不同的jsp页面中验证并显示用户名的待办事项列表。

这是我的代码

LoginController.class

  @RequestMapping(value = "/loginvalidate")
  public String validatelogin(LoginForm request, ModelMap map) throws Exception {
    String userName = request.getUserName();
    sessionUser.setUserName(userName);
    map.addAttribute("user", sessionUser.getUserName());
    map.addAttribute("dateTime", sessionscopebillingdata.getDate());
    System.out.println("username from the controller class " + sessionUser.getUserName());
    List result = loginservice.ValidateLogin(request);
    map.addAttribute("ToDoList", result);
    return "UserToDoList";
 }

这是我的UserToDoList.jsp

<html>
<head>
    <title>Home</title>
<div class="inset">
    <%=session.getAttribute("dateTime")%>
    <h2> TO DO LIST </h2>        
    <%=session.getAttribute("user")%>
    <link href="style.css" rel="stylesheet" type="text/css"/>
</head>    
<body>
    <form action="logout" method="POST">
        <button type="submit">Logout</button>    
    </form>        

    <form name="Add" action="Adduser" method="post">
        <button type="submit">ADD</button> 

    </form>
    </link>
    <form:form>

        <c:if test="${not empty ToDoList}">

            <table>

                <tr><th>LOGIN ID</th>
                    <th>LAST UPDATE BY</th>
                    <th>TRANSACTION TYPE</th>
                    <th>STATUS</th>
                </tr>    
                <c:forEach var="item" items="${ToDoList}">
                    <tr>   <td>${item[0]}</td>
                        <td>${item[1]}</td>
                        <td>${item[2]}</td>   
                        <td>${item[3]}</td>
                    </tr>
                </c:forEach>

            </table>

        </c:if>


    </form:form>

  </body>
  </html>

如果单击“添加”按钮，从上面的JSP中，它将转到下面的JSP

AddUser.jsp

<form:form method="POST" name="LoginForm" modelAttribute="roleId" action="adduser"> 
 <ul>
    <li>
        <label>User Name</label> <input type="text" name="userName" />
    </li>
    <li>
        <label>Password</label> <input type="text" name="passWord" />
    </li>
    <li>
        <label>Approver </label> <input type="text" name="approver" />
    </li>
    <li>
        <label>User Role </label>
        <form:select path="userRole" items="${Codes}" tabindex="50">
            <form:option value="----------Please select---------" />
            <form:option value="${role.id}" />
            <form:option value="${role.codeValue}" /> 
        </li>
    </form:select>
  </ul>  


 <input type="submit" value="Submit"> 

</form:form>

从上面的JSP中点击提交然后它会在同一个Logincontroller类中调用下面的方法，这就是添加新用户。

添加新用户后，我希望此方法返回到具有相同输出的相同“UserToDoList.jsp”。如何实现这一点，请帮忙。

下面的方法来自LoginController.class

@RequestMapping(value = "/adduser")
public String adduser(LoginForm request) throws Exception {
    String result = loginservice.adduser(request);
    return "/Adduser";
 }

在我的bean下面获取用户名

@Component
@Scope(value="session", proxyMode=ScopedProxyMode.TARGET_CLASS)

public class BillingSessionScopeUser {

public String userName;

public String getUserName() {
    return userName;
}

public void setUserName(String userName) {
    this.userName = userName;
}

}

Answer 1

我认为您应该清楚地将登录阶段与待办事项列表提取分开。它可能看起来像：

@RequestMapping(value = "/loginvalidate")
public String validatelogin(LoginForm request, ModelMap map, Session session) throws Exception {
    String userName = request.getUserName();
    sessionUser.setUserName(userName);
    map.addAttribute("user", sessionUser.getUserName());
    map.addAttribute("dateTime", sessionscopebillingdata.getDate());
    System.out.println("username from the controller class " + sessionUser.getUserName());
    // BEGIN CHANGE
    List result = loginservice.getTodoList(userName);
    //END CHANGE
    map.addAttribute("ToDoList", result);
    return "UserToDoList";
}

然后在POST的{{1}}部分，您可以：

adduser

或者，您可以尝试从@RequestMapping(value = "/adduser") public String adduser(@ModelAttribute LoginForm request, ModelMap model) throws Exception { String result = loginservice.adduser(request); String userName = sessionUser.getUserName(); List result = loginservice.getTodoList(userName); map.addAttribute("ToDoList", result); map.addAttribute("user", userName); map.addAttribute("dateTime", sessionscopebillingdata.getDate()); return "UserToDoList"; // ensure correct name for view }（以及最终其他会话范围的bean）重建LoginForm，例如sessionUser并直接使用：

sessionRequest

Answer 2

@RequestMapping(value = "/adduser")
public String adduser(LoginForm request) throws Exception {
String result = loginservice.adduser(request);
return "UserToDoList";
}

单击“添加”按钮时，返回要显示的文件名。

如何使用相同的值返回Spring MVC中的相同JSP页面

2 个答案: