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我只输入给我错误的代码

我的控制器类有以下方法

@RequestMapping(method=RequestMethod.GET, value="/displayUser")
public String displayUsers(Model model)
{
    model.addAttribute("Users", userDetailsService.listUsers());
    return "displayUser";

}

我的服务类有以下方法

public List<UserDetails> listUsers()
{
    Query que=hibernateSessionFactory.openSession().createQuery("select userName from UserDetails");
    List<UserDetails> listOfUsers=null;
    try {

        listOfUsers=  que.list();
        } catch (Exception e) {
            System.err.println("Error");
        }
    return listOfUsers;
}

我想列出我的 JSP 上的所有用户名，所以我使用了 JSTL

       <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="s" uri="http://www.springframework.org/tags" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ page isELIgnored="false"%>

<!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>Display User</title>
</head>
<body>

<c:forEach var="Users" items="${Users}">
${Users.userName}
</c:forEach>


</body>
</html>

我收到上述代码的以下错误。

javax.el.PropertyNotFoundException: Property 'userName' not found on type java.lang.String
javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:237)
javax.el.BeanELResolver$BeanProperties.access$400(BeanELResolver.java:214)
javax.el.BeanELResolver.property(BeanELResolver.java:325)
javax.el.BeanELResolver.getValue(BeanELResolver.java:85)
org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:104)
org.apache.el.parser.AstValue.getValue(AstValue.java:183)
org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:1026)
org.apache.jsp.WEB_002dINF.views.displayUser_jsp._jspx_meth_c_005fforEach_005f0(displayUser_jsp.java:119)
org.apache.jsp.WEB_002dINF.views.displayUser_jsp._jspService(displayUser_jsp.java:80)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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