java无法获取servlet设置的jstl requestScope变量
我第一次学习JSTL
,正在使用jstl-1.2。jar、Tomcat 7和Eclipse IDE中最新版本的Java
我试图简单地为列表中的每个项目打印出表中的行。列表中的对象在servlet
中设置了它们的公共属性,该属性将列表转发到索引。我正在尝试打印的jsp页面
以下是我的servlet:
import jstl.Employee;
@WebServlet("/HomeServlet")
public class HomeServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<Employee> empList = new ArrayList<Employee>();
Employee emp1 = new Employee();
emp1.setId(1); emp1.setName("John");emp1.setRole("Developer");
Employee emp2 = new Employee();
emp2.setId(2); emp2.setName("Jane");emp2.setRole("Manager");
empList.add(emp1);empList.add(emp2);
request.setAttribute("empList", empList);
RequestDispatcher rd = getServletContext().getRequestDispatcher("/index.jsp");
rd.forward(request, response);
}
}
还有索引。jsp页面,我尝试循环列表并打印出对象变量,这些变量是可公开访问的属性:
<%@ page language="java" contentType="text/html; charset=US-ASCII"
pageEncoding="US-ASCII"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Home Page</title>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
<style>
table,th,td
{border:1px solid black;}
</style>
</head>
<body>
<%-- Using JSTL forEach and out to loop a list and display items in table --%>
<table>
<tbody>
<tr><th>ID</th><th>Name</th><th>Role</th></tr>
<c:forEach items="${requestScope.empList}" var="emp">
<tr><td><c:out value="${emp.id}"></c:out></td>
<td><c:out value="${emp.name}"></c:out></td>
<td><c:out value="${emp.role}"></c:out></td></tr>
</c:forEach>
</tbody>
</table>
<br><br>
</body>
</html>
当前,当我加载页面时,只显示表格标题,而不显示两行。这是为什么
编辑: 新增员工类别:
package jstl;
public class Employee {
private int id;
private String name;
private String role;
public Employee() {
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
}
编辑:这些是jstl。我用的罐子:
共 (0) 个答案