org.apache.jasper.JasperException

Z时代
2024-01-10
分类：IT

在java文件里面可以执行，但是放到jsp页面中就不行了

这个可以执行

package com.mvc;
import com.mvc.bean.Goods;
import com.mvc.dao.GoodsDao;
import com.mvc.impl.GoodsDaoImpl;
import java.util.List;
public class selectGoodsTest {
    public static void main(String[] args) throws ClassNotFoundException {
        GoodsDao goodsDao = new GoodsDaoImpl();
        List<Goods> goodsTotal = goodsDao.getAllGoods();
        Goods goods = goodsDao.getGoodsById(1);
        System.out.println("根据ID获取名字");
        System.out.println(goods.getGoodsName());
    }}

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*" %>
<%@ page import="com.mvc.bean.Goods"%>
<%@ page import="com.mvc.dao.GoodsDao"%>
<%@ page import="com.mvc.impl.GoodsDaoImpl"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">
    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
    <style type="text/css">
        div{
            float:left;
            margin: 10px;
        }
        div dd{
            margin:0px;
            font-size:10pt;
        }
        div dd.dd_name
        {
            color:blue;
        }
        div dd.dd_city
        {
            color:#000;
        }
    </style>
</head>
<body>
<!-- 商品循环开始 -->
<%
    //图书的实体类创建一个对象
    Goods goods = new Goods();
    //图书的业务逻辑层
    GoodsDao goodsDao = new GoodsDaoImpl();
    List<Goods> goodsTotal = goodsDao.getAllGoods();
    if (goodsTotal != null) {
    } else {
        System.out.println("空指针");
    }
%>
<h1>商品展示</h1>
<hr>
    <table width="750" height="60" cellpadding="0" cellspacing="0" border="0">
        <tr>
            <td>
                <div>
                    <dl>
                        <dt>
                        </dt>
                        <dd class="dd_name"><%=goodsTotal.get(0).getGoodsName() %></dd>
                    </dl>
                </div>
                <!-- 商品循环结束 -->
            </td>
        </tr>
    </table>
</body></html>