Question

我有一个带参数的Person.class：名称，年龄，电子邮件，并且我有一个jsp表单用于将新用户添加到ArrayList中。

    @WebServlet(urlPatterns = "/addclientform.jsp")
public class AddClientServlet extends HttpServlet {

    private PersonStorage personlist1 = new PersonStorage();

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String name = req.getParameter("name");
        int age = Integer.parseInt(req.getParameter("age"));
        String email = req.getParameter("email");

        Person person = new Person(name, age, email);
        personlist1.addPerson(person);

        req.setAttribute("list", personlist1);
        req.getRequestDispatcher("clientList.jsp").forward(req,resp);
    }
}

<html>
<head>
<title>Clien Page</title>
</head>
<body>
    <table>
        <tr>
            <th>Name</th>
            <th>Age</th>
            <th>Email</th>
        </tr>
        <c:forEach items="${list}" var="personlist">
            <tr>
                <td>${personlist.name}</td>
                <td>${personlist.age}</td>
                <td>${personlist.email}</td>
            </tr>
        </c:forEach>
    </table>
    <form name="home" action="home.jsp" method="post">
        <input type="submit" value="back">
    </form>
</body>
</html>

但是当我想查看所有用户时，我无法执行此操作。我在哪里弄错了？

Answer 1

您需要在页面顶部添加以下指令：

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

为什么我不能显示用户列表？

1 个答案: