<%@ page import="java.util.List" %> <%@ page import="com.example.model.User" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <title>Title</title> <h1>User List</h1> <table border="1"> <tr> <td><strong>Id</strong></td> <td><strong>Username</strong></td> <td><strong>password</strong></td> <td><strong>Email</strong></td> <td><strong>Gender</strong></td> <td><strong>Birthday</strong></td> </tr> <c:choose> <c:when test="${empty userlist}"> <tr><td> <h1>No Order Found.</h1> </td> </c:when> <c:otherwise> <c:forEach var="u" items="${userlist}"> <tr> <td>User :<span><%=u.getUsername()%></span></td> <td>Password :<span><%=u.getPassword()%></span></td> <td>Email :<span><%=u.getEmail()%></span></td> <td>Sex :<span><%=u.getSex()%></span></td> <td>Country :<span><%=u.getCountry()%></span></td> <td> <a href="edit?id=<%=u.getId()%>">Edit</a></td> <td> <a href="delete?id=<%=u.getId()%>">Delete</a></td> </tr> </c:forEach> </c:otherwise> </c:choose> </table> <a href="register">Add User</a>

这是一个 JSP 页面，用于显示用户列表。它引入了 Java 类型的 List 和 User，以及 JSTL 的核心标签库。它通过使用 forEach 标签遍历 userlist 中的用户对象，并显示它们的用户名、密码、电子邮件、性别和国家。如果用户列表为空，则显示“找不到订单”的消息。此外，页面还提供了“添加用户”链接，指向“register”页面。

相关问题

java web完整代码

您请求的是关于《第二单元单元考核6-网购平台套题3-订单配送系统》的Java Web完整代码。根据您的描述，这里提供一个简要的设计方案和部分关键代码示例，以帮助您理解和实现这个项目。请注意，这只是一个简化的版本，实际项目可能需要更详细的实现。

### 1. 数据库设计
#### 订单表 (orders)

CREATE TABLE orders (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    total_amount DECIMAL(10, 2) NOT NULL,
    order_status VARCHAR(50) NOT NULL,
    delivery_time DATETIME,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

#### 配送员信息表 (delivery_persons)

CREATE TABLE delivery_persons (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    phone VARCHAR(20) NOT NULL
);

#### 订单配送关系表 (order_delivery)

CREATE TABLE order_delivery (
    order_id INT NOT NULL,
    delivery_person_id INT NOT NULL,
    assigned_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (order_id, delivery_person_id),
    FOREIGN KEY (order_id) REFERENCES orders(id),
    FOREIGN KEY (delivery_person_id) REFERENCES delivery_persons(id)
);

### 2. Java Web应用结构
假设我们使用MVC架构，以下是项目的基本结构：

src/
├── main/
│   ├── java/
│   │   └── com/
│   │       └── example/
│   │           ├── controller/
│   │           │   ├── OrderController.java
│   │           │   └── DeliveryController.java
│   │           ├── model/
│   │           │   ├── Order.java
│   │           │   ├── DeliveryPerson.java
│   │           │   └── OrderDelivery.java
│   │           └── service/
│   │               ├── OrderService.java
│   │               └── DeliveryService.java
│   └── webapp/
│       ├── WEB-INF/
│       │   └── web.xml
│       ├── index.jsp
│       ├── orderList.jsp
│       ├── orderDetails.jsp
│       └── deliverySettings.jsp

### 3. 关键代码示例

#### OrderController.java

package com.example.controller;

import com.example.model.Order;
import com.example.service.OrderService;
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 java.io.IOException;
import java.util.List;

@WebServlet("/orders")
public class OrderController extends HttpServlet {
    private OrderService orderService = new OrderService();

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        int page = Integer.parseInt(request.getParameter("page"));
        List<Order> orders = orderService.getOrders(page);
        request.setAttribute("orders", orders);
        request.getRequestDispatcher("/WEB-INF/orderList.jsp").forward(request, response);
    }
}

#### OrderService.java

package com.example.service;

import com.example.model.Order;

import java.util.List;

public class OrderService {
    public List<Order> getOrders(int page) {
        // 假设每页显示8条记录
        int offset = (page - 1) * 8;
        // 从数据库中查询订单
        return getOrdersFromDatabase(offset, 8);
    }

    private List<Order> getOrdersFromDatabase(int offset, int limit) {
        // 实现数据库查询逻辑
        return null;
    }
}

#### orderList.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html>
<head>
    <title>订单列表</title>
</head>
<body>
<h1>订单列表</h1>
<table>
    <tr>
        <th>订单ID</th>
        <th>用户ID</th>
        <th>总金额</th>
        <th>订单状态</th>
        <th>配送时间</th>
        <th>操作</th>
    </tr>
    <c:forEach var="order" items="${orders}">
        <tr>
            <td>${order.id}</td>
            <td>${order.userId}</td>
            <td>${order.totalAmount}</td>
            <td>${order.orderStatus}</td>
            <td>${order.deliveryTime}</td>
            <td><a href="orderDetails?id=${order.id}">详情</a></td>
        </tr>
    </c:forEach>
</table>
<a href="?page=1">首页</a>
<a href="?page=${currentPage-1}">上一页</a>
<a href="?page=${currentPage+1}">下一页</a>
</body>
</html>

### 4. 配送设置页面 (deliverySettings.jsp)

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html>
<head>
    <title>配送设置</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<h1>配送设置</h1>
<form id="deliveryForm">
    <input type="hidden" name="orderId" value="${order.id}">
    <label for="deliveryPerson">选择配送员:</label>
    <select id="deliveryPerson" name="deliveryPersonId">
        <c:forEach var="deliveryPerson" items="${deliveryPersons}">
            <option value="${deliveryPerson.id}">${deliveryPerson.name}</option>
        </c:forEach>
    </select>
    <br>
    <label for="deliveryTime">选择配送时间:</label>
    <input type="datetime-local" id="deliveryTime" name="deliveryTime">
    <br>
    <button type="submit">提交</button>
</form>

<script>
    $(document).ready(function() {
        $('#deliveryForm').on('submit', function(event) {
            event.preventDefault();
            var orderId = $('#orderId').val();
            var deliveryPersonId = $('#deliveryPerson').val();
            var deliveryTime = $('#deliveryTime').val();

            $.ajax({
                url: 'setDelivery',
                method: 'POST',
                data: {
                    orderId: orderId,
                    deliveryPersonId: deliveryPersonId,
                    deliveryTime: deliveryTime
                },
                success: function(response) {
                    if (response.success) {
                        alert('配送设置成功');
                        window.location.href = 'orders?page=1';
                    } else {
                        alert('该配送员已有其他配送任务，请选择其他配送员');
                    }
                }
            });
        });
    });
</script>
</body>
</html>

### 5. 交付检查
- **功能一**：订单列表分页显示。
- **功能二**：订单详情页显示订单信息和配送状态。
- **功能三**：设置配送员和配送时间。
- **功能四**：检查配送员是否有其他任务。
- **功能五**：返回订单列表页。
- **功能六**：页面美观设计。
- **功能七**：使用AJAX实现功能四。

### 6. 附加建议
- **代码规范**：确保代码命名规范，添加必要的注释。
- **额外技术**：可以考虑使用前端框架（如React、Vue）来提升用户体验。
- **安全性**：确保输入验证和SQL注入防护。

希望这些信息能帮助您完成项目。如果有任何具体问题或需要进一步的帮助，请随时提问。

IDEA+Java+JSP+Mysql+Tomcat写一个Web学生信息管理系统

为了写一个基于IDEA、Java、JSP、MySQL和Tomcat的Web学生信息管理系统，你可以按照以下步骤进行：

1. 创建一个Maven项目，项目结构如下：

|--src
|  |--main
|  |  |--java
|  |  |  |--com.example.student
|  |  |  |  |--db // 数据库相关类
|  |  |  |  |--model // 实体类
|  |  |  |  |--servlet // Servlet类
|  |  |  |--resources
|  |  |  |--webapp // JSP页面和静态资源
|  |  |--webapp // Web资源
|  |--test
|  |  |--java
|--pom.xml

2. 在MySQL中创建一个名为“student”的数据库，然后创建一个名为“students”的表，表结构如下：

CREATE TABLE students (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(50) NOT NULL,
  gender VARCHAR(10) NOT NULL,
  age INT NOT NULL,
  major VARCHAR(50) NOT NULL,
  grade INT NOT NULL
);

3. 在db包下创建一个名为“DBUtil”的工具类，用于连接数据库。代码如下：

package com.example.student.db;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBUtil {
    private static final String URL = "jdbc:mysql://localhost:3306/student";
    private static final String USER = "root";
    private static final String PASSWORD = "root";

    public static Connection getConnection() {
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection(URL, USER, PASSWORD);
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
        return conn;
    }
}

4. 在model包下创建一个名为“Student”的实体类，代码如下：

package com.example.student.model;

public class Student {
    private int id;
    private String name;
    private String gender;
    private int age;
    private String major;
    private int grade;

    public Student() {
    }

    public Student(int id, String name, String gender, int age, String major, int grade) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.major = major;
        this.grade = grade;
    }

    // getter和setter方法省略
}

5. 在servlet包下创建一个名为“StudentServlet”的Servlet类，用于处理前端传来的请求。代码如下：

package com.example.student.servlet;

import com.example.student.db.DBUtil;
import com.example.student.model.Student;

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 java.io.IOException;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;

@WebServlet(name = "StudentServlet", urlPatterns = "/student")
public class StudentServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String action = req.getParameter("action");
        if ("add".equals(action)) {
            // 处理学生信息添加请求
            String name = req.getParameter("name");
            String gender = req.getParameter("gender");
            int age = Integer.parseInt(req.getParameter("age"));
            String major = req.getParameter("major");
            int grade = Integer.parseInt(req.getParameter("grade"));
            Student student = new Student(0, name, gender, age, major, grade);
            addStudent(student);
            resp.sendRedirect(req.getContextPath() + "/student");
        } else if ("edit".equals(action)) {
            // 处理学生信息编辑请求
            int id = Integer.parseInt(req.getParameter("id"));
            String name = req.getParameter("name");
            String gender = req.getParameter("gender");
            int age = Integer.parseInt(req.getParameter("age"));
            String major = req.getParameter("major");
            int grade = Integer.parseInt(req.getParameter("grade"));
            Student student = new Student(id, name, gender, age, major, grade);
            updateStudent(student);
            resp.sendRedirect(req.getContextPath() + "/student");
        } else if ("delete".equals(action)) {
            // 处理学生信息删除请求
            int id = Integer.parseInt(req.getParameter("id"));
            deleteStudent(id);
            resp.sendRedirect(req.getContextPath() + "/student");
        } else {
            // 处理学生信息列表请求
            List<Student> students = getAllStudents();
            req.setAttribute("students", students);
            req.getRequestDispatcher("/WEB-INF/views/student.jsp").forward(req, resp);
        }
    }

    private List<Student> getAllStudents() {
        List<Student> students = new ArrayList<>();
        try (Connection conn = DBUtil.getConnection();
             Statement stmt = conn.createStatement()) {
            String sql = "SELECT * FROM students";
            ResultSet rs = stmt.executeQuery(sql);
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                String gender = rs.getString("gender");
                int age = rs.getInt("age");
                String major = rs.getString("major");
                int grade = rs.getInt("grade");
                Student student = new Student(id, name, gender, age, major, grade);
                students.add(student);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return students;
    }

    private void addStudent(Student student) {
        try (Connection conn = DBUtil.getConnection();
             PreparedStatement stmt = conn.prepareStatement("INSERT INTO students (name, gender, age, major, grade) VALUES (?, ?, ?, ?, ?)")) {
            stmt.setString(1, student.getName());
            stmt.setString(2, student.getGender());
            stmt.setInt(3, student.getAge());
            stmt.setString(4, student.getMajor());
            stmt.setInt(5, student.getGrade());
            stmt.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    private void updateStudent(Student student) {
        try (Connection conn = DBUtil.getConnection();
             PreparedStatement stmt = conn.prepareStatement("UPDATE students SET name=?, gender=?, age=?, major=?, grade=? WHERE id=?")) {
            stmt.setString(1, student.getName());
            stmt.setString(2, student.getGender());
            stmt.setInt(3, student.getAge());
            stmt.setString(4, student.getMajor());
            stmt.setInt(5, student.getGrade());
            stmt.setInt(6, student.getId());
            stmt.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    private void deleteStudent(int id) {
        try (Connection conn = DBUtil.getConnection();
             PreparedStatement stmt = conn.prepareStatement("DELETE FROM students WHERE id=?")) {
            stmt.setInt(1, id);
            stmt.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

6. 在webapp目录下创建一个名为“student.jsp”的JSP页面，用于显示学生信息列表和处理学生信息的添加、编辑和删除等操作。代码如下：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>学生信息管理系统</title>
</head>
<body>
<h1>学生信息管理系统</h1>
<table border="1">
    <tr>
        <th>ID</th>
        <th>姓名</th>
        <th>性别</th>
        <th>年龄</th>
        <th>专业</th>
        <th>年级</th>
        <th>操作</th>
    </tr>
    <c:forEach items="${students}" var="student">
        <tr>
            <td>${student.id}</td>
            <td>${student.name}</td>
            <td>${student.gender}</td>
            <td>${student.age}</td>
            <td>${student.major}</td>
            <td>${student.grade}</td>
            <td>
                <a href="${pageContext.request.contextPath}/student?action=edit&id=${student.id}">编辑</a>
                <a href="${pageContext.request.contextPath}/student?action=delete&id=${student.id}">删除</a>
            </td>
        </tr>
    </c:forEach>
</table>
<h2>添加学生信息</h2>
<form method="post" action="${pageContext.request.contextPath}/student?action=add">
    <div>
        <label for="name">姓名：</label>
        <input type="text" id="name" name="name" required>
    </div>
    <div>
        <label for="gender">性别：</label>
        <input type="radio" id="gender" name="gender" value="男" required>男
        <input type="radio" id="gender" name="gender" value="女" required>女
    </div>
    <div>
        <label for="age">年龄：</label>
        <input type="number" id="age" name="age" required>
    </div>
    <div>
        <label for="major">专业：</label>
        <input type="text" id="major" name="major" required>
    </div>
    <div>
        <label for="grade">年级：</label>
        <input type="number" id="grade" name="grade" required>
    </div>
    <div>
        <button type="submit">添加</button>
    </div>
</form>
<c:if test="${not empty param.id}">
    <h2>编辑学生信息</h2>
    <form method="post" action="${pageContext.request.contextPath}/student?action=edit&id=${param.id}">
        <div>
            <label for="name">姓名：</label>
            <input type="text" id="name" name="name" value="${student.name}" required>
        </div>
        <div>
            <label for="gender">性别：</label>
            <input type="radio" id="gender" name="gender" value="男" ${student.gender=='男'?'checked':''} required>男
            <input type="radio" id="gender" name="gender" value="女" ${student.gender=='女'?'checked':''} required>女
        </div>
        <div>
            <label for="age">年龄：</label>
            <input type="number" id="age" name="age" value="${student.age}" required>
        </div>
        <div>
            <label for="major">专业：</label>
            <input type="text" id="major" name="major" value="${student.major}" required>
        </div>
        <div>
            <label for="grade">年级：</label>
            <input type="number" id="grade" name="grade" value="${student.grade}" required>
        </div>
        <div>
            <button type="submit">保存</button>
        </div>
    </form>
</c:if>
</body>
</html>

7. 在pom.xml文件中添加以下依赖：

<dependencies>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.1</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.26</version>
    </dependency>
</dependencies>

8. 在Tomcat中部署该项目，启动Tomcat服务，通过浏览器访问项目的根路径，即可看到学生信息管理系统的页面。

以上是一个基本的实现过程，具体实现过程中还需要根据实际情况进行相应的调整和优化。