以上是我正在尝试创建的内容你好，以上是我尝试使用 Spring Boot 创建的内容。我的问题是如何正确地迭代 forEach 循环并提取 JSP 中所需的必要数据？我以为我做得正确，但是，我不断收到错误消息“不知道如何迭代 <forEach> 中提供的“items””请参阅下面的代码了解我目前正在做什么。提前感谢您的帮助！控制器@RequestMapping(value = "/showOrders.html") public String listOrders(Model model) { ArrayList<Order> orders = os.findAll(); model.addAttribute("allOrders", orders); return "allOrders"; }“订单”的服务类别package com.sales.services;import java.util.ArrayList;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.sales.models.Order;import com.sales.repositories.OrderRepository;@Servicepublic class OrderService { @Autowired OrderRepository or; public ArrayList<Order> findAll() { return (ArrayList<Order>) or.findAll(); }}订单的存储库类package com.sales.repositories;import java.util.ArrayList;import java.util.List;import org.springframework.data.jpa.repository.Query;import org.springframework.data.repository.CrudRepository;import org.springframework.data.repository.query.Param;import org.springframework.stereotype.Repository;import com.sales.models.Customer;import com.sales.models.Order;@Repositorypublic interface OrderRepository extends CrudRepository<Order, Long> {}
1 回答
有只小跳蛙
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下面是这个问题的解答
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
<link href="/css/style.css" rel="stylesheet"></link>
<head>
<meta charset="ISO-8859-1">
<title>List of Customers</title>
</head>
<body>
<h1>List of Customers</h1>
<c:forEach items="${ordrs}" var="ords">
<c:forEach items="${ords.orders}" var="order">
<b>${order.oId} </b>
<table>
<tr>
<th>Quantity</th>
<th>Order Date</th>
<th>Customer ID</th>
<th>Customer Name</th>
<th>Product ID</th>
<th>Description</th>
</tr>
<tr>
<td>${order.qty}</td>
<td>${order.orderDate}</td>
<td>${ords.cId}</td>
<td>${ords.cName}</td>
<td>${order.prod.pId}</td>
<td>${order.prod.pDesc}</td>
</tr>
</table>
</c:forEach>
</c:forEach>
</body>
</html>
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