简易图书管理系统

javaweb+jsp+servlet

实体类

package com.ghx.entity;

/**
 * @author ：guo
 * @date ：Created in 2024/12/6 10:13
 * @description：
 * @modified By：
 * @version:
 */
public class Book {
    private int id;
    private String name;
    private double price;
    private String publisher;

    public Book() {
    }

    public Book(int id, String name, double price, String publisher) {
        this.id = id;
        this.name = name;
        this.price = price;
        this.publisher = publisher;
    }

    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 double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public String getPublisher() {
        return publisher;
    }

    public void setPublisher(String publisher) {
        this.publisher = publisher;
    }
}

package com.ghx.entity;

/**
 * @author ：guo
 * @date ：Created in 2024/12/3 16:48
 * @description：
 * @modified By：
 * @version:
 */
public class User {
    private int id;
    private String username;
    private String password;
    private String realname;
    private int age;

    public User() {
    }

    public User(int id, String username, String password, String realname, int age) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.realname = realname;
        this.age = age;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getRealname() {
        return realname;
    }

    public void setRealname(String realname) {
        this.realname = realname;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

dao

package com.ghx.dao;

import java.sql.*;

/**
 * @author ：guo
 * @date ：Created in 2024/12/2 14:08
 * @description：
 * @modified By：
 * @version:
 */
public class BaseDao {
    Connection conn=null;
    PreparedStatement ps=null;
    ResultSet rs=null;
    String url = "jdbc:mysql://localhost:3306/day06";
    String username = "root";
    String password = "123456";
    String driverName="com.mysql.cj.jdbc.Driver";
    public int edit(String sql,Object... obj){
        try {
            getConn();
            ps = conn.prepareStatement(sql);
            for(int i=0;i<obj.length;i++){
               ps.setObject(i+1,obj[i]);
            }
            int i=ps.executeUpdate();
            return i;
        } catch (Exception e) {
            return 0;
        } finally {
            closeAll();
        }
    }
    //连接数据库
    public void getConn() throws Exception{
        Class.forName(driverName);
        conn = DriverManager.getConnection(url, username, password);
    }
    //关闭资源
    public void closeAll(){
        try {
            if(rs!=null){
                rs.close();
            }
            if(ps!=null){
                ps.close();
            }
            if(conn!=null){
                conn.close();
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }
}

package com.ghx.dao;

import com.ghx.entity.Book;
import com.ghx.entity.User;

import java.util.ArrayList;
import java.util.List;
/**
 * @author ：guo
 * @date ：Created in 2024/12/6 10:13
 * @description：
 * @modified By：
 * @version:
 */
public class BookDao extends BaseDao{
    public List<Book> findAll() {
        List<Book> list=new ArrayList<Book>();
        try {
            getConn();
            String sql="select id,name,price,publisher from tbl_book ";
            ps=conn.prepareStatement(sql);
            rs=ps.executeQuery();
            while (rs.next()){
                Book book=new Book();
                book.setId(rs.getInt("id"));
                book.setName(rs.getString("name"));
                book.setPrice(rs.getDouble("price"));
                book.setPublisher(rs.getString("publisher"));
                list.add(book);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            closeAll();
        }
        return list;
    }
    //插入
    public int insert(String name,double price,String publisher){
        String sql="insert into tbl_book(name,price,publisher) values (?,?,?)";
        return edit(sql,name,price,publisher);
    }
    //回显数据
    public Book findById(int id){
        Book book=null;
        try {
            getConn();
            String sql="select id,name,price,publisher from tbl_book where id=?";
            ps=conn.prepareStatement(sql);
            ps.setObject(1,id);
            rs=ps.executeQuery();
            while (rs.next()){
                book=new Book();
                book.setId(rs.getInt("id"));
                book.setName(rs.getString("name"));
                book.setPrice(rs.getDouble("price"));
                book.setPublisher(rs.getString("publisher"));
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            closeAll();
        }
        return book;
    }
    //修改
    public int updateBook(String name,double price,String publisher,int id){
        String sql= "update tbl_book set name=?,price=?,publisher=? where id=?";
        return edit(sql,name,price,publisher,id);
    }
    //删除
    public int deleteBook(int id){
        String sql="delete from tbl_book where id=?";
        return edit(sql,id);
    }
}

package com.ghx.dao;

import com.ghx.entity.User;

import java.util.ArrayList;

/**
 * @author ：guo
 * @date ：Created in 2024/12/3 16:48
 * @description：
 * @modified By：
 * @version:
 */
public class UserDao extends BaseDao{
    //登录判断
    public User find(String username,String password){
        User user=null;
        try {
            getConn();
            String sql="select id,username,password,realname,age from tbl_user where username=? and password=?";
            ps=conn.prepareStatement(sql);
            ps.setObject(1,username);
            ps.setObject(2,password);
            rs=ps.executeQuery();
            while (rs.next()){
                user=new User();
                int id = rs.getInt("id");
                String name = rs.getString("username");
                String pwd = rs.getString("password");
                String realname = rs.getString("realname");
                int age = rs.getInt("age");
                user.setId(id);
                user.setUsername(name);
                user.setPassword(pwd);
                user.setRealname(realname);
                user.setAge(age);
            }
            return user;
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            closeAll();
        }
    }
    //注册
    public int add(String name,String pwd,String rname,String age){
        String sql="insert into tbl_user values(null,?,?,?,?)";
        return edit(sql,name,pwd,rname,age);
    }
}

servlet

package com.ghx.servlet;


import com.ghx.dao.BookDao;
import com.ghx.entity.Book;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.util.List;

@WebServlet(name = "BookServlet", value = "/BookServlet")
public class BookServlet extends HttpServlet {
    private BookDao bookDao=new BookDao();
    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String method = request.getParameter("method");
        if("insert".equals(method)){
            insertBook(request,response);
        }else if("getById".equals(method)){
            getById(request,response);
        } else if("update".equals(method)){
            updateById(request,response);
        }else if("delete".equals(method)){
            deleteById(request,response);
        }else {
            selectAll(request,response);
        }
    }

    private void deleteById(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        int id = Integer.parseInt(request.getParameter("id"));
        int i = bookDao.deleteBook(id);
        if(i>0){
            response.sendRedirect("/BookServlet");
        }
    }

    //修改
    private void updateById(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        int id = Integer.parseInt(request.getParameter("id"));
        String name = request.getParameter("name");
        double price = Double.parseDouble(request.getParameter("price"));
        String publisher = request.getParameter("publisher");
        int i = bookDao.updateBook(name, price, publisher, id);
        if(i>0){
            response.sendRedirect("/BookServlet");
        }
    }

    //回显数据
    private void getById(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        int id = Integer.parseInt(request.getParameter("id"));
        Book byId = bookDao.findById(id);
        request.setAttribute("bookid",byId);
        request.getRequestDispatcher("/update.jsp").forward(request,response);
    }

    //添加
    private void insertBook(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        String name = request.getParameter("name");
        double price = Double.parseDouble(request.getParameter("price"));
        String publisher = request.getParameter("publisher");
        int insert = bookDao.insert(name, price, publisher);
        if(insert>0){
            response.sendRedirect("/BookServlet");
        }
    }
    //展示全部
    private void selectAll(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{

        List<Book> all = bookDao.findAll();
        request.setAttribute("book",all);
        request.getRequestDispatcher("/index.jsp").forward(request,response);
    }

}

package com.ghx.servlet;

import com.ghx.dao.UserDao;
import com.ghx.entity.User;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;

@WebServlet(name = "UserServlet", value = "/UserServlet")
public class UserServlet extends HttpServlet {
    private UserDao userDao=new UserDao();
    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String method = request.getParameter("method");
        if("login".equals(method)){
            login(request,response);
        }else if("register".equals(method)){
            register(request,response);
        }else if("logout".equals(method)){
            logout(request,response);
        }
    }
    //退出系统
    private void logout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("userinfo");
        session.removeAttribute("userinfo");
        response.sendRedirect("/login.jsp");
    }

    //注册
    private void register(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        String realname = request.getParameter("realname");
        String age = request.getParameter("age");
        int add = userDao.add(username, password, realname, age);
        if(add>0){
            response.sendRedirect("/login.jsp?success=1");
        }else {
            request.setAttribute("error2","<span style=\"color: red \">注册失败，用户名已存在!</span>");
            request.getRequestDispatcher("/register.jsp?error2").forward(request,response);
        }
    }
    //登录
    private void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        User user = userDao.find(username, password);
        if(user!=null){
            request.getSession().setAttribute("userinfo",user);
            response.sendRedirect("/BookServlet");
        }else {
            request.setAttribute("error","<span style=\"color: red \">用户名或密码错误!</span>");
            request.getRequestDispatcher("/login.jsp?error").forward(request,response);
        }
    }

}

页面

login.jsp

<%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2024/12/3
  Time: 16:40
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
  <title>登录</title>
  <style>
    /* 整体页面背景设置 */
    body {
      font-family: Arial, sans-serif;
      /* background-image: url('背景图片路径');*/
      background-size: cover;
      background-repeat: no-repeat;
      background-position: center;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      margin: 0;
    }

    /* 登录框样式 */
    .login-box {
      background-color: rgba(255, 255, 255, 0.8);
      padding: 40px;
      border-radius: 10px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    }

    /* 标题样式 */
    h2 {
      text-align: center;
      margin-bottom: 30px;
      color: #333;
    }

    /* 输入框样式 */
    input[type="text"],
    input[type="password"] {
      width: 100%;
      padding: 15px;
      margin-bottom: 20px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 16px;
    }

    /* 登录按钮样式 */
    input[type="submit"] {
      width: 100%;
      padding: 15px;
      background-color: #007BFF;
      color: white;
      border: none;
      border-radius: 5px;
      font-size: 16px;
      cursor: pointer;
    }

    input[type="submit"]:hover {
      background-color: #0056b3;
    }

    /* 注册链接样式 */
    .register-link {
      text-align: center;
      margin-top: 15px;
    }

    a {
      color: #007BFF;
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
    }

  </style>
</head>
<body>
<div class="login-box">
  <h2>登录</h2>
  <div>

  </div>
  <form action="/UserServlet?method=login" method="post">
    <input type="text" placeholder="用户名" name="username">
    <input type="password" placeholder="密码" name="password">
    <input type="submit" value="登录">
  </form>
  <div class="register-link">
    <a href="/register.jsp">还没有账号？注册</a>
  </div>
  <div>
        ${error}

  </div>
</div>
</body>
</html>

register.jsp

<%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2024/12/3
  Time: 16:46
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>注册</title>
    <style>
        /* 整体页面背景设置 */
        body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }

        /* 注册框样式 */
        .register-box {
            background-color: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            width: 400px;
        }

        /* 标题样式 */
        h2 {
            text-align: center;
            margin-bottom: 30px;
            color: #333;
        }

        /* 输入框通用样式 */
        input[type="text"],
        input[type="password"],
        input[type="email"],
        input[type="number"]{
            width: 100%;
            padding: 15px;
            margin-bottom: 20px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 16px;
        }

        /* 注册按钮样式 */
        input[type="submit"] {
            width: 100%;
            padding: 15px;
            background-color: #007BFF;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
        }

        input[type="submit"]:hover {
            background-color: #007BFF;
        }

        /* 已有账号登录链接样式 */
        .login-link {
            text-align: center;
            margin-top: 20px;
        }

        a {
            color: #007BFF;
            text-decoration: none;
        }

        a:hover {
            text-decoration: underline;
        }
    </style>
</head>
<body>

<div class="register-box">
    <h2>注册新账号</h2>
    <form action="/UserServlet?method=register" method="post">
        <input type="text" placeholder="用户名" name="username">
        <input type="password" placeholder="设置密码" name="password">
        <input type="text" placeholder="真实姓名" name="realname">
        <input type="number" placeholder="年龄" name="age">
        <input type="submit" value="注册">
    </form>
    <div class="login-link">
        <a href="login.jsp">已有账号？点击登录</a>
    </div>
    ${error2}

</div>
</body>
</html>

index.jsp

<%@ page import="java.util.ArrayList" %>
<%@ page import="com.ghx.entity.User" %><%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2024/12/4
  Time: 9:25
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
  <title>Title</title>
  <style>
    /* 全局样式重置与基础设置 */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: Arial, sans-serif;
    }

    body {
      background-color: #f4f9ff;
      color: #333;
      line-height: 1.6;
    }

    /* 页面头部样式 */
    header {
      background-color: #007bff;
      color: white;
      text-align: center;
      padding: 20px 0;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }

    header h1 {
      margin: 0;
    }

    /* 导航栏样式 */
    nav {
      background-color: #0056b3;
      padding: 10px 0;
    }
    nav ul {
      list-style-type: none;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    nav ul li {
      margin: 0 15px;
      color: white;
    }

    nav a {
      color: white;
      text-decoration: none;
      padding: 8px 15px;
      border-radius: 4px;
      transition: background-color 0.3s ease;
    }

    nav a:hover {
      background-color: #003d80;
    }

    /* 主要内容区域样式 */
    main {
      padding: 20px;
      max-width: 1000px;
      margin: 20px auto;
      background-color: white;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
      border-radius: 5px;
    }

    main h1 {
      text-align: center;
      margin-bottom: 20px;
      color: #007bff;
    }

    /* 表格样式 */
    table {
      width: 100%;
      border-collapse: collapse;
      margin-bottom: 20px;
      border: 1px solid #ccc;
    }

    table th,
    table td {
      border: 1px solid #ccc;
      padding: 12px;
      text-align: center;
    }

    table th {
      background-color: #e6f7ff;
      color: #333;
      font-weight: bold;
    }

    table tr:nth-child(even) {
      background-color: #f9f9f9;
    }

    table tr:hover {
      background-color: #e9f3ff;
      cursor: pointer;
    }

    /* 操作链接样式 */
    table td a {
      color: #007bff;
      text-decoration: none;
      margin: 0 5px;
      padding: 5px 10px;
      border-radius: 3px;
      transition: background-color 0.3s ease, color 0.3s ease;
    }

    table td a:hover {
      background-color: #007bff;
      color: white;
    }

    /* 退出按钮样式 */
    .logout {
      float: right;
      margin-right: 20px;
      color: white;
      text-decoration: none;
      padding: 8px 15px;
      border-radius: 4px;
      background-color: #dc3545;
      transition: background-color 0.3s ease;
      display: flex;
      align-items: center;
    }

    .logout:hover {
      background-color: #c82333;
    }

    .logout i {
      margin-right: 5px;
    }

    /* 修改成功提示样式 */
    .success-message {
      text-align: center;
      color: green;
      margin-bottom: 20px;
      font-weight: bold;
      display: none;
    }
  </style>
</head>
<body>
<c:if test="${sessionScope.userinfo==null}">
  <c:redirect url="login.jsp"></c:redirect>
</c:if>

<header>
  <h1>书籍信息管理系统</h1>
</header>
<nav>

  <ul><li>欢迎${sessionScope.userinfo.realname}登录</li></ul>
  <ul>

    <li><a href="#">首页</a></li>
    <li><a href="/insert.jsp">添加</a></li>
    <a href="/UserServlet?method=logout" class="logout">退出</a>
  </ul>

</nav>
<main>

  <table>
    <tr>
      <th>书籍id</th>
      <th>书籍名</th>
      <th>价格</th>
      <th>出版社</th>
      <th>操作</th>
    </tr>
    <c:forEach items="${requestScope.book}" var="b">
      <tr>
        <td>${b.id}</td>
        <td>${b.name}</td>
        <td>${b.price}</td>
        <td>${b.publisher}</td>
        <td>
          <a href="/BookServlet?method=delete&id=${b.id}" onclick="return confirm('确定要删除该条信息吗？');">删除</a>
          <a href="/BookServlet?method=getById&id=${b.id}">修改</a>
        </td>
      </tr>
    </c:forEach>
  </table>
</main>
</body>
</html>

insert.jsp

<%@ page import="com.ghx.entity.User" %><%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2024/12/4
  Time: 10:31
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <style>
        /* 全局样式重置，去除浏览器默认样式差异 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Roboto', sans-serif; /* 使用更现代的字体 */
            background-color: #eef2f7; /* 淡蓝色系背景，营造清新氛围 */
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }
        /* 主要内容容器样式 */
        .main-container {
            width: 500px; /* 设定合适的宽度 */
            background-color: white;
            border-radius: 8px; /* 较大的圆角，更显柔和 */
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); /* 柔和阴影效果 */
            overflow: hidden; /* 隐藏超出部分，确保圆角效果正常显示 */
        }
        /* 标题样式 */
        h2 {
            background-color: cornflowerblue; /* 标题栏蓝色背景 */
            color: white;
            text-align: center;
            padding: 15px 0;
            margin-bottom: 20px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 20px;
        }
        th, td {
            border-bottom: 1px solid #e0e0e0; /* 仅底部显示边框，简洁风格 */
            padding: 12px 20px;
            text-align: left;
        }
        th {
            font-weight: normal; /* 表头字体不加粗，更显简洁 */
            color: #777; /* 表头文字灰色，区分数据 */
        }
        input[type="text"] {
            width: 100%;
            padding: 8px;
            border: 1px solid #ccc;
            border-radius: 4px;
            background-color: #f9f9f9; /* 输入框浅灰色背景，更清晰 */
            color: #333; /* 输入框文字颜色 */
            outline: none; /* 去除输入框聚焦时的默认边框 */
            transition: background-color 0.2s ease; /* 背景色过渡效果 */
        }
        input[type="text"]:focus {
            background-color: white; /* 输入框聚焦时变白，增强交互感 */
        }
        input[type="submit"] {
            display: block;
            width: 100%;
            padding: 10px 0;
            background-color: #2ecc71; /* 绿色提交按钮，更醒目积极 */
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            transition: background-color 0.3s ease; /* 背景色过渡效果 */
        }
        input[type="submit"]:hover {
            background-color: #27ae60; /* 悬停时加深绿色 */
        }
    </style>
</head>
<body>
<c:if test="${sessionScope.userinfo==null}">
    <c:redirect url="login.jsp"></c:redirect>
</c:if>

<div class="main-container">
    <h2>书籍信息</h2>
    <form action="/BookServlet?method=insert" method="post"> <!-- 添加表单标签，假设提交到当前页面，实际需修改action属性指向处理逻辑 -->
        <table>
            <tr>
                <th>书籍名:</th>
                <td><input type="text"  name="name"></td>
            </tr>
            <tr>
                <th>书籍价格:</th>
                <td><input type="text" name="price"></td>
            </tr>
            <tr>
                <th>出版社:</th>
                <td><input type="text" name="publisher"></td>
            </tr>
            <tr>
                <td colspan="2"><input type="submit" value="确认添加"></td>
            </tr>
        </table>
    </form>
</div>

</body>
</html>

update.jsp

<%@ page import="com.ghx.entity.User" %><%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2024/12/4
  Time: 10:31
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <style>
        /* 全局样式重置，去除浏览器默认样式差异 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Roboto', sans-serif; /* 使用更现代的字体 */
            background-color: #eef2f7; /* 淡蓝色系背景，营造清新氛围 */
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }
        /* 主要内容容器样式 */
        .main-container {
            width: 500px; /* 设定合适的宽度 */
            background-color: white;
            border-radius: 8px; /* 较大的圆角，更显柔和 */
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); /* 柔和阴影效果 */
            overflow: hidden; /* 隐藏超出部分，确保圆角效果正常显示 */
        }
        /* 标题样式 */
        h2 {
            background-color: cornflowerblue; /* 标题栏蓝色背景 */
            color: white;
            text-align: center;
            padding: 15px 0;
            margin-bottom: 20px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 20px;
        }
        th, td {
            border-bottom: 1px solid #e0e0e0; /* 仅底部显示边框，简洁风格 */
            padding: 12px 20px;
            text-align: left;
        }
        th {
            font-weight: normal; /* 表头字体不加粗，更显简洁 */
            color: #777; /* 表头文字灰色，区分数据 */
        }
        input[type="text"] {
            width: 100%;
            padding: 8px;
            border: 1px solid #ccc;
            border-radius: 4px;
            background-color: #f9f9f9; /* 输入框浅灰色背景，更清晰 */
            color: #333; /* 输入框文字颜色 */
            outline: none; /* 去除输入框聚焦时的默认边框 */
            transition: background-color 0.2s ease; /* 背景色过渡效果 */
        }
        input[type="text"]:focus {
            background-color: white; /* 输入框聚焦时变白，增强交互感 */
        }
        input[type="submit"] {
            display: block;
            width: 100%;
            padding: 10px 0;
            background-color: #2ecc71; /* 绿色提交按钮，更醒目积极 */
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            transition: background-color 0.3s ease; /* 背景色过渡效果 */
        }
        input[type="submit"]:hover {
            background-color: #27ae60; /* 悬停时加深绿色 */
        }
    </style>
</head>
<body>
<c:if test="${sessionScope.userinfo==null}">
    <c:redirect url="login.jsp"></c:redirect>
</c:if>

<div class="main-container">
    <h2>书籍信息</h2>
    <form action="/BookServlet?method=update" method="post"> <!-- 添加表单标签，假设提交到当前页面，实际需修改action属性指向处理逻辑 -->
        <table>
            <tr>
                <th>书籍id:</th>
                <td><input type="text" value="${bookid.id}" name="id" readonly></td>
            </tr>
            <tr>
                <th>书籍名:</th>
                <td><input type="text" value="${bookid.name}" name="name"></td>
            </tr>
            <tr>
                <th>书籍价格:</th>
                <td><input type="text" value="${bookid.price}" name="price"></td>
            </tr>
            <tr>
                <th>出版社:</th>
                <td><input type="text" value="${bookid.publisher}" name="publisher"></td>
            </tr>
            <tr>
                <td colspan="2"><input type="submit" value="确认添加"></td>
            </tr>
        </table>
    </form>
</div>

</body>
</html>