2

我从：

JSP1->JSP2-JSP3-JSP1

在JSP1 - 管理屏幕中，我有存储以下数据的对象Administrator：这是adminPage.jsp

<!DOCTYPE html>
<html>
<head><title>System Administrator Page</title>
<link rel="stylesheet"
      href="./css/styles.css"
      type="text/css"/>
</head>
<body>


<h1>Hello ${name.firstName} ${name.lastName} , You've logged in successfully!</h1>
<h1>
Please choose one of the following options
</h1>

<fieldset>
  <legend>Add a new employee to the bank system</legend> 
  <form action="blablabla">     <!-- THAT ONE forwards to a servlet that's called Admin1.java -->
    <a href="adminAdds1">Press here to continue</a>  
  </form>
</fieldset>


<!-- NOTE THE FORWARDS TO THE SERVLETS -->


<fieldset>
  <legend>Add a new manager to the bank system</legend>
  <form action="blablabla">  <!-- THAT ONE forwards to a servlet that's called Admin2.java -->
    <a href="adminAdds2">Press here to continue</a>
  </form>
</fieldset>

</body></html>

图片：

在此处输入图像描述

然后我转到下一页 - JSP2，即adminAddNewEmployee.jsp：

<!DOCTYPE html>
<html>
<head><title>System Administrator Page</title>
<link rel="stylesheet"
      href="./css/styles.css"
      type="text/css"/>
</head>
<body>


<h1>Registration Page for Administrator!</h1>
<h1>
Add a new employee to the bank system
</h1>

<!-- Admin adds a new employee -->

<fieldset>
  <legend>Registration</legend>
  <form action="adminOperation1"> 
    First name: <input type="text" name="firstName"><br>
    Last name : <input type="text" name="lastName"><br>
    Address   : <input type="text" name="address"><br>
    ID-number : <input type="text" name="idnumber"><br>
    User-Name : <input type="text" name="userName"><br>
    Password  : <input type="text" name="password"><br>
    Status    : <input type="text" name="status"><br>
    <input type="submit" value="Register">
  </form>
</fieldset>

</body></html>

看起来像这样：

在此处输入图像描述

而我，管理员，向系统添加了一个新的管理员。

然后我到达这里 - 到JSP3，它是：adminSuccess.jsp

<!DOCTYPE html>
<html>
<head><title>Database has been updated successfully!</title>
<link rel="stylesheet"
      href="./css/styles.css"
      type="text/css"/>
</head>
<body>
<h1>Congratulations , Database has been updated successfully for the following Manager!</h1>
<h2>Manager's first-Name: ${name.firstName}</h2>
<h2>Manager's last-Name: ${name.lastName}</h2>
<h2>Manager's address: ${name.address}</h2>
<h2>Manager's password: ${name.password}</h2>
<h2>Manager's user-Name: ${name.userName}</h2>
<h2>Manager's id-Number: ${name.idnumber }</h2>

<fieldset>
  <legend>Continue to Admin's transactions page</legend>
  <form action="blablabla"> 
    <a href="adminAdds3">Press here to continue</a>
  </form>
</fieldset>

</body></html>

图片 ：

在此处输入图像描述

现在，我想回到母库，例如JSP1，即adminPage.jsp，所以我添加了一个 servlet：

/**
 * Servlet implementation class Admin3
 */
@WebServlet("/adminAdds3")
public class Admin3 extends HttpServlet {
    private static final long serialVersionUID = 1L;


    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
    {
        request.getRequestDispatcher("/WEB-INF/results/adminPage.jsp").forward(request, response);
    }


}

为了回到JSP1，但后来我得到了这个：

在此处输入图像描述

所以，代替我原来的管理员，Jack Reacher，我得到了大卫鲍伊.....

旧管理员未存储。

我怎样才能解决这个问题 ？

问候

4

1 回答 1

1

您需要在登录帐户时设置会话变量（已登录的用户的名称和 ID），并且当您需要此 ID 和用户名时，您可以通过访问会话变量来获取它。这肯定会解决您的问题

或者

尝试通过在 jsp2 上将文本框的名称从 firstname 更改为 first_name

于 2012-08-08T06:18:45.247 回答