报错的相关代码
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="f" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="h" uri="http://java.sun.com/jsp/jstl/fmt"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>图书后台管理</title>
<link rel="stylesheet" href="css/index.css">
<link rel="stylesheet" href="css/bootstrap.min.css">
</head>
<body>
<header>
<div class="container">
<nav>
<a href="bookList.jsp" >图书信息管理</a>
</nav>
<nav>
<a href="categoryList.jsp" >分类管理</a>
</nav>
</div>
</header>
<section class="banner">
<div class="container">
<div>
<h1>图书管理系统</h1>
<p>图书分类管理</p>
</div>
</div>
</section>
<section class="main">
<div class="container">
<table class="table table-striped">
<thead>
<tr>
<th>序号</th>
<th>分类编号</th>
<th>分类名称</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<f:if test="${!empty cList}">
<f:forEach items="${cList}" var="c" varStatus="idx">
<tr>
<td>${idx.index+1}</td>
<td>${c.CatId}</td>
<td>${c.Catname}</td>
<td><a href="/AddCategory?cId=${c.CatId}">删除</a></td>
<!--在循环显示数据时，此处的ca0001可以用EL表达式进行替换-->
</tr>
</f:forEach>
</f:if>
</tbody>
</table>
</div>
</section>
<section class="page">
<div class="container">
<div id="fatie">
<a href="addCategory.jsp"><button>新建</button></a>
</div>
</div>
</section>
<footer>
copy@慕课网
</footer>
<script type="text/javascript">
</script>
</body>
</html>
package com.imooc.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.imooc.reader.Category;
import com.imooc.reader.CategoryServicList;
/**
* Servlet implementation class AddCategory
*/
@WebServlet("/AddCategory")
public class AddCategory extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public AddCategory() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
HttpServletRequest hRequest=(HttpServletRequest) request;
HttpServletResponse hResponse=(HttpServletResponse) response;
String categoryId= hRequest.getParameter("categoryId");
String categoryName=hRequest.getParameter("categoryName");
String cId=hRequest.getParameter("cId");
CategoryServicList categoryServicList=new CategoryServicList();
if (categoryId!=null&&categoryName!=null) {
categoryServicList.addCatgory(categoryId, categoryName);
List<Category> cList= categoryServicList.getCategorydb();
System.out.println(cList.size());
request.getSession().setAttribute("cList", cList);
request.getRequestDispatcher("/categoryList.jsp").forward(request, response);
}
if (cId!=null) {
categoryServicList.deleteCatgory(categoryId);
List<Category> cList= categoryServicList.getCategorydb();
request.getSession().setAttribute("cList", cList);
request.getRequestDispatcher("/categoryList.jsp").forward(request, response);
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
正在回答 回答被采纳积分+1
- 参与学习 人
- 提交作业 676 份
- 解答问题 9666 个
本阶段将从前端网页搭建入手，到Java Web基础，前后端结合助你完成Java Web小白的蜕变！
了解课程
恭喜解决一个难题，获得1积分~
来为老师/同学的回答评分吧
0 星