寫在前邊：
這個一個JavaWeb項目的基礎實戰的分享，當然如果可以你們可以拿走當作業（前提你們的作業要求並不高）
本項目只實現了基本的增刪改查，略懂Java基礎也可以拿走根據需要修改，也算提供了一個項目結構組織的框架，可以作為參考。本項目暫時只實現了基礎的增刪改查一套，模糊查詢一個，還有分頁查詢。這些內容也算是開發JavaWeb項目開發的核心內容，其它的可以根據需要自己完善。
源碼下載 ↓ ↓ ↓
項目壓縮包下載 — 百度網盤 提取碼: 9vh7
項目壓縮包下載 — CSDN
GitHub下載（已更新，添加了用戶登錄模塊）
目錄
一、開發環境和項目結構
開發環境
- JDK 8
- MySQL 5.7
- Tomcat 9.0
- IDEA 2018
- 推薦使用當前或更高開發環境
項目結構
二、項目配置
emmmm，有點長我單獨寫了一篇博客，需要的可以去看一下
https://blog.csdn.net/weixin_44580492/article/details/107335967
三、代碼編寫步驟
- 開始編寫之前，推薦將項目結構中的 包 先構建好
- 1~6步屬於C/S項目
- 1~9步屬於B/S項目，第6步除外，可省略不寫
1.編寫數據庫代碼
創建名為 book 的數據庫
create database book;
創建名為 book 的數據表
CREATE TABLE `book` (
`BOOK_ID` int(50) NOT NULL AUTO_INCREMENT,
`BOOK_NAME` varchar(100) NOT NULL,
`ISBN` varchar(100),
`CATEGORY` varchar(100),
PRIMARY KEY (`BOOK_ID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
2.編寫工具類
在util包下操作
編寫數據庫連接配置文件 db-config.properties
jdbc.url=jdbc:mysql://localhost:3306/book?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456
jdbc.driver=com.mysql.jdbc.Driver
編寫數據庫連接類 DBUtil
package com.jmp.util;
import java.sql.*;
import java.util.ResourceBundle;
/** * @author JYH * @version 1.0 * @date 2020/6/19 23:53 */
public class DBUtil {
//數據庫連接地址
private static final String URL;
//數據庫用戶名
private static final String USERNAME;
//數據庫密碼
private static final String PASSWORD;
//加載數據庫連接驅動程序
private static final String DRIVER;
private DBUtil(){}
//加載數據庫配置文件
private static ResourceBundle rb = ResourceBundle.getBundle("com.jmp.util.db-config");
//加載數據庫配置文件中的連接信息
static{
URL = rb.getString("jdbc.url");
USERNAME = rb.getString("jdbc.username");
PASSWORD = rb.getString("jdbc.password");
DRIVER = rb.getString("jdbc.driver");
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
//創建數據庫連接
public static Connection getConnection() {
Connection con = null;
try {
con = DriverManager.getConnection(URL,USERNAME,PASSWORD);
// System.out.println("數據庫連接成功。");
} catch (SQLException throwables) {
throwables.printStackTrace();
System.out.println("數據庫連接失敗，請檢查數據庫地址、用戶名、密碼是否存在錯誤！！！");
}
return con;
}
//關閉數據庫連接
public static void close(ResultSet rs, Statement stat,Connection con) throws SQLException {
if(rs != null){
rs.close();
}if(stat != null){
rs.close();
}if(con != null){
rs.close();
}
System.out.println("數據庫連接已關閉！");
}
//測試數據庫連接
public static void main(String[] args) {
System.out.println(DBUtil.getConnection());
}
}
編寫完DBUtil類后我們可以先運行一下 main 方法，看數據庫能否連接成功。
編寫分頁工具類 PageBean
package com.jmp.util;
/** * 分頁工具類 * @author JYH * @version 1.0 * @date 2020/6/23 11:42 */
public class PageBean {
private int page;// 頁碼
private int rows;// 頁大小
private int total;// 總記錄數
private boolean pagination = true;// 是否分頁
public PageBean() {
super();
}
public int getPage() {
return page;
}
public void setPage(int page) {
this.page = page;
}
public int getRows() {
return rows;
}
public void setRows(int rows) {
this.rows = rows;
}
public int getTotal() {
return total;
}
public void setTotal(int total) {
this.total = total;
}
public void setTotal(String total) {
this.total = Integer.parseInt(total);
}
public boolean isPagination() {
return pagination;
}
public void setPagination(boolean pagination) {
this.pagination = pagination;
}
/** * 獲得起始記錄的下標 * * @return */
public int getStartIndex() {
return (this.page - 1) * this.rows;
}
@Override
public String toString() {
return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + "]";
}
}
3.編寫實體類
在pojo包下操作
編寫圖書實體類 Book
package com.jmp.pojo;
/** * @author JYH * @version 1.0 * @date 2020/6/19 23:50 */
public class Book {
private int book_id;
private String book_name;
private String isbn;
private String category;
public Book() {
}
public Book(int book_id, String book_name, String isbn, String category) {
this.book_id = book_id;
this.book_name = book_name;
this.isbn = isbn;
this.category = category;
}
public int getBook_id() {
return book_id;
}
public void setBook_id(int book_id) {
this.book_id = book_id;
}
public String getBook_name() {
return book_name;
}
public void setBook_name(String book_name) {
this.book_name = book_name;
}
public String getIsbn() {
return isbn;
}
public void setIsbn(String isbn) {
this.isbn = isbn;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
@Override
public String toString() {
return "Book{" +
"book_id=" + book_id +
", book_name='" + book_name + '\'' +
", isbn='" + isbn + '\'' +
", category='" + category + '\'' +
'}';
}
}
4.編寫數據處理層
在dao包下操作
創建接口 BookDao，規定需要實現的功能
package com.jmp.dao;
import com.jmp.pojo.Book;
import java.sql.SQLException;
import java.util.List;
/** * @author JYH * @version 1.0 * @date 2020/6/20 0:21 */
public interface BookDao {
/** * 查詢所有圖書 */
List<Book> selectAll() throws SQLException;
/** * 添加圖書 */
void add(Book book) throws SQLException;
/** * 更新圖書信息 */
void update(Book book) throws SQLException;
/** * 刪除圖書 */
void delete(Book book) throws SQLException;
/** * 根據書名模糊查詢 */
List<Book> blurryName(Book book) throws SQLException;
/** * 獲取具體的圖書信息 * @return */
Book bookInfo(Book book) throws SQLException;
/** * 分頁查詢圖書 */
List<Book> selectAll(int currentPage,int pageSize) throws SQLException;
}
根據需要實現的功能，編寫對應的數據庫代碼配置文件 book-sql.properties
book.sql.selectAll=select * from book
book.sql.add=insert into book(book_name,isbn,category) value (?,?,?)
book.sql.update=update book set book_name=?,isbn=?,category=? where book_id=?
book.sql.delete=delete from book where book_id=?
book.sql.blurryName=select * from book where book_name like ?
book.sql.deleteBook=select * from book where book_id=?
book.sql.selectAllPage=select * from book limit ?,?
編寫 BookDao 接口的實現類 BookDaoImpl
package com.jmp.dao;
import com.jmp.pojo.Book;
import com.jmp.util.DBUtil;
import lombok.Data;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import java.sql.SQLException;
import java.util.List;
import java.util.ResourceBundle;
/** * @author JYH * @version 1.0 * @date 2020/6/20 0:41 */
@Data
public class BookDaoImpl implements BookDao{
//查詢運行器
static QueryRunner qr = null;
//加載sql文件
static ResourceBundle rb = ResourceBundle.getBundle("com.jmp.dao.book-sql");
public BookDaoImpl(){
//創建BookDaoImpl對象時加載QueryRunner
qr = new QueryRunner();
}
@Override
public List<Book> selectAll() throws SQLException {
String sql = rb.getString("book.sql.selectAll");
List<Book> list = qr.query(DBUtil.getConnection(),sql,new BeanListHandler<Book>(Book.class));
return list;
}
@Override
public void add(Book book) throws SQLException {
String sql = rb.getString("book.sql.add");
qr.update(DBUtil.getConnection(),sql,book.getBook_name(),book.getIsbn(),book.getCategory());
}
@Override
public void update(Book book) throws SQLException {
String sql = rb.getString("book.sql.update");
qr.update(DBUtil.getConnection(),sql,book.getBook_name(),book.getIsbn(),book.getCategory(),book.getBook_id());
}
@Override
public void delete(Book book) throws SQLException {
String sql = rb.getString("book.sql.delete");
qr.update(DBUtil.getConnection(),sql,book.getBook_id());
}
@Override
public List<Book> blurryName(Book book) throws SQLException {
String sql = rb.getString("book.sql.blurryName");
List<Book> list = qr.query(DBUtil.getConnection(),sql,new BeanListHandler<Book>(Book.class),"%"+book.getBook_name()+"%");
return list;
}
@Override
public Book bookInfo(Book book) throws SQLException{
String sql = rb.getString("book.sql.deleteBook");
Book b = qr.query(DBUtil.getConnection(),sql,new BeanHandler<Book>(Book.class),book.getBook_id());
return b;
}
@Override
public List<Book> selectAll(int currentPage, int pageSize) throws SQLException {
String sql = rb.getString("book.sql.selectAllPage");
List<Book> list = qr.query(DBUtil.getConnection(),sql,new BeanListHandler<>(Book.class),((currentPage-1)*pageSize),pageSize);
return list;
}
}
5.編寫業務邏輯層
在service包下操作
編寫 BookService 接口，規定需要實現的業務
package com.jmp.service;
import com.jmp.pojo.Book;
import java.sql.SQLException;
import java.util.List;
/** * @author JYH * @version 1.0 * @date 2020/6/20 1:36 */
public interface BookService {
/** * 查詢所有圖書 */
List<Book> selectAll() throws SQLException;
/** * 添加圖書 */
void add(Book book) throws SQLException;
/** * 更新圖書信息 */
void update(Book book) throws SQLException;
/** * 刪除圖書 */
void delete(Book book) throws SQLException;
/** * 根據書名模糊查詢 */
List<Book> blurryName(Book book) throws SQLException;
/** * 獲取刪除圖書的信息 * @return */
Book bookInfo(Book book) throws SQLException;
/** * 分頁查詢圖書（后期添加 --- 使用default關鍵字） */
List<Book> selectAll(int currentPage,int pageSize) throws SQLException;
}
編寫 BookService 接口的實現類 BookServiceImpl
package com.jmp.service;
import com.jmp.dao.BookDao;
import com.jmp.dao.BookDaoImpl;
import com.jmp.pojo.Book;
import lombok.Data;
import java.sql.SQLException;
import java.util.List;
/** * @author JYH * @version 1.0 * @date 2020/6/20 1:37 */
@Data
public class BookServiceImpl implements BookService{
BookDao bookDao = new BookDaoImpl();
@Override
public List<Book> selectAll() throws SQLException {
return bookDao.selectAll();
}
@Override
public void add(Book book) throws SQLException {
bookDao.add(book);
}
@Override
public void update(Book book) throws SQLException {
bookDao.update(book);
}
@Override
public void delete(Book book) throws SQLException {
bookDao.delete(book);
}
@Override
public List<Book> blurryName(Book book) throws SQLException {
return bookDao.blurryName(book);
}
@Override
public Book bookInfo(Book book) throws SQLException{
return bookDao.bookInfo(book);
}
@Override
public List<Book> selectAll(int currentPage, int pageSize) throws SQLException {
return bookDao.selectAll(currentPage,pageSize);
}
}
6.編寫控制台程序（C/S）
在view包下操作
編寫 BookManager 類，在控制台使用圖書管理系統的功能
package com.jmp.view;
import com.jmp.pojo.Book;
import com.jmp.service.BookService;
import com.jmp.service.BookServiceImpl;
import java.sql.SQLException;
import java.util.List;
import java.util.Scanner;
/** * @author JYH * @version 1.0 * @date 2020/6/20 1:47 */
public class BookManager {
static Scanner sc = new Scanner(System.in);
static BookService bookService = new BookServiceImpl();
public static void main(String[] args) {
while (true) {
System.out.println("|----------------圖書管理系統-----------------|");
System.out.println("|1-增加 2-刪除 3-修改 4-查找 5-顯示所有 0-退出|");
System.out.println("|--------------------------------------|");
System.out.println("請選擇業務");
int x = sc.nextInt();
switch (x) {
case 1:
add();
break;
case 2:
delete();
break;
case 3:
update();
break;
case 4:
bookLike();
break;
case 5:
selectAll();
break;
case 0:
System.out.println("程序已退出，歡迎再次使用！");
System.exit(0);
break;
default:
System.out.println("輸入數據有誤，請重新輸入！");
break;
}
}
}
public static void add(){
System.out.println("------------增加------------");
System.out.println("圖書名稱：");
String name = sc.next();
System.out.println("ISBN編號：");
String isbn = sc.next();
System.out.println("圖書類別：");
String category = sc.next();
Book book = new Book(0,name,isbn,category);
try {
bookService.add(book);
System.out.println("增加成功！---------------\n");
} catch (SQLException e1) {
e1.printStackTrace();
}
}
public static void delete() {
System.out.println("------------刪除------------");
System.out.println("請輸入要刪除的圖書編號：");
int id = sc.nextInt();
Book book = new Book();
book.setBook_id(id);
try {
book = bookService.bookInfo(book);
System.out.println(book.toString());
System.out.println("確認要刪除嗎？1-是 0-否");
int cmd = sc.nextInt();
if(1==cmd) {
bookService.delete(book);
System.out.println("刪除成功！");
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void update() {
System.out.println("------------修改------------");
System.out.println("請輸入要修改圖書的編號：");
int id = sc.nextInt();
Book book = new Book();
book.setBook_id(id);
try {
book = bookService.bookInfo(book);
} catch (SQLException e) {
e.printStackTrace();
}
System.out.println(book.toString());
System.out.println("請重新輸入圖書的信息：");
System.out.println("圖書名稱：");
String name = sc.next();
System.out.println("ISBN編號：");
String isbn = sc.next();
System.out.println("圖書類別：");
String category = sc.next();
book = new Book(id,name,isbn,category);
try {
bookService.update(book);
System.out.println("修改成功！---------------");
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void bookLike() {
System.out.println("-------------模糊查詢------------");
System.out.println("請輸入圖書名稱關鍵字：");
String name = sc.next();
Book book = new Book();
book.setBook_name(name);
try {
List<Book> list = bookService.blurryName(book);
for(Book b:list) {
System.out.println(b.toString());
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void selectAll() {
System.out.println("-------------查詢所有------------");
try {
List<Book> list = bookService.selectAll();
for(Book book:list) {
System.out.println(book.toString());
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
7.編寫業務控制層（B/S）
在servlet包下操作
編寫 BookServlet，對整體業務進行控制
package com.jmp.servlet;
import com.jmp.pojo.Book;
import com.jmp.service.BookService;
import com.jmp.service.BookServiceImpl;
import com.jmp.util.PageBean;
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.SQLException;
import java.util.List;
/** * @author JYH * @version 1.0 * @date 2020/6/20 22:10 */
@WebServlet(name = "BookServlet",urlPatterns = "/BookServlet")
public class BookServlet extends HttpServlet {
BookService bookService = new BookServiceImpl();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request,response);
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String m = request.getParameter("m");
if ("add".equals(m)){
add(request,response);
}else if("update".equals(m)){
update(request,response);
}else if("delete".equals(m)){
delete(request,response);
}else if("selectAll".equals(m)){
selectAll(request,response);
}else if("bookInfo".equals(m)){
bookInfo(request,response);
}else if ("blurryname".equals(m)){
bookBlurryName(request, response);
}
}
private void add(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
String bookName = request.getParameter("book_name");
String isbn = request.getParameter("isbn");
String category = request.getParameter("category");
Book book = new Book(0,bookName,isbn,category);
System.out.println(book.toString());
try {
bookService.add(book);
selectAll(request,response);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
private void update(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
String bookId = request.getParameter("book_id");
String bookName = request.getParameter("book_name");
String isbn = request.getParameter("isbn");
String category = request.getParameter("category");
Book book = new Book(Integer.parseInt(bookId),bookName,isbn,category);
try {
bookService.update(book);
selectAll(request,response);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
private void delete(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
String bookId = request.getParameter("book_id");
Book book = new Book();
book.setBook_id(Integer.parseInt(bookId));
try {
bookService.delete(book);
selectAll(request,response);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
PageBean pb = new PageBean();
int pageUp = pb.getPage();
int pageDown = pb.getPage();
private void selectAll(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
if("pageUp".equals(request.getParameter("pageUp"))){
System.out.println(request.getParameter("pageUp"));
pb.setPage(pb.getPage()-1);
// request.setAttribute("pageUp",pb.getPage());
if (pb.getPage() < 1){
pb.setPage(1);
}
try {
List<Book> booklist = bookService.selectAll(pb.getPage(),5);
request.setAttribute("bookList",booklist);
request.getRequestDispatcher("/views/booklist.jsp").forward(request,response);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}else if("pageDown".equals(request.getParameter("pageDown"))){
System.out.println(request.getParameter("pageDown"));
pb.setPage(pb.getPage()+1);
// request.setAttribute("pageDown",pb.getPage());
try {
List<Book> booklist = bookService.selectAll(pb.getPage(),5);
request.setAttribute("bookList",booklist);
if ("".equals(booklist)){
request.setAttribute("null_err","<h3>查詢內容為空請返回上一頁</h3>");
}
request.getRequestDispatcher("/views/booklist.jsp").forward(request,response);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}else{
// request.setAttribute("pageUp",1);
// request.setAttribute("pageDown",2);
pb.setPage(1);
try {
List<Book> booklist = bookService.selectAll(pb.getPage(),5);
request.setAttribute("bookList",booklist);
request.getRequestDispatcher("/views/booklist.jsp").forward(request,response);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
}
/* private void selectAll(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { try { List<Book> booklist = bookService.selectAll(1,5); request.setAttribute("bookList",booklist); request.getRequestDispatcher("/views/booklist.jsp").forward(request,response); } catch (SQLException throwables) { throwables.printStackTrace(); } }*/
private void bookInfo(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
String bookId = request.getParameter("book_id");
Book book = new Book();
book.setBook_id(Integer.parseInt(bookId));
try {
Book b = bookService.bookInfo(book);
request.setAttribute("b", b);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
request.getRequestDispatcher("/views/updatebook.jsp").forward(request, response);
}
private void bookBlurryName(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
String keyName = request.getParameter("blurryname");
Book book = new Book();
book.setBook_name(keyName);
try {
List<Book> bookblurryList = bookService.blurryName(book);
request.setAttribute("bookblurryList",bookblurryList);
request.getRequestDispatcher("/views/blurrynamebook.jsp").forward(request,response);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
}
8.編寫過濾器
在filter包下操作
編寫字符編碼過濾器 CharacterEncodingFilter，防止數據傳遞和頁面亂碼
package com.jmp.filter;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import java.io.IOException;
/** * @author JYH * @version 1.0 * @date 2020/6/21 0:15 */
@WebFilter(
filterName="CharacterEncodingFilter",
urlPatterns="/*",
initParams= {@WebInitParam(name="characterEncoding",value="utf-8")}
)
public class CharacterEncodingFilter implements Filter {
private String characterEncoding;
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
System.out.println("characterEncoding="+characterEncoding);
if(null!=characterEncoding) {
req.setCharacterEncoding(characterEncoding);
resp.setCharacterEncoding(characterEncoding);
}
chain.doFilter(req, resp);
}
@Override
public void init(FilterConfig config) throws ServletException {
characterEncoding = config.getInitParameter("characterEncoding");
}
}
9.編寫前端頁面
在 web/views 文件夾下操作
編寫書籍添加頁面，addbook.jsp
<%--
Created by IntelliJ IDEA.
User: JYH
Date: 2020/6/20
Time: 20:56
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>添加圖書</title>
</head>
<body>
<div align="center">
<h3>添加圖書</h3>
<form action="${pageContext.request.contextPath}/BookServlet?m=add" method="post">
<table>
<tr>
<td>圖書名稱</td>
<td><input type="text" name="book_name"></td>
</tr>
<tr>
<td>ISBN編號</td>
<td><input type="text" name="isbn"></td>
</tr>
<tr>
<td>圖書類型</td>
<td><input type="text" name="category"></td>
</tr>
</table>
<input type="submit" value="添加"> <input type="reset" value="重置">
</form>
</div>
</body>
</html>
編寫書籍模糊查詢頁面，blurrynamebook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
Created by IntelliJ IDEA.
User: JYH
Date: 2020/6/21
Time: 0:21
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>書名模糊查詢</title>
<style> table,table tr th,table tr td{ border:1px solid #000; text-align:center; } table{ width:600px; border-collapse:collapse; } #index p{ padding-top:5px; padding-left:480px; } a{ text-decoration:none; } </style>
</head>
<body>
<div align="center">
<h3>書名模糊查詢</h3>
<form action="${pageContext.request.contextPath}/BookServlet?m=blurryname" method="post">
<input type="text" name="blurryname"><input type="submit" value="搜索"><br><br>
<div id="index"><a href="/index.jsp">返回首頁</a></div>
<table>
<tr>
<td>圖書編號</td>
<td>圖書名稱</td>
<td>ISBN編號</td>
<td>圖書類別</td>
<td>選擇操作</td>
</tr>
<c:forEach items="${bookblurryList}" var="bookblurrylist">
<tr>
<td>${bookblurrylist.book_id}</td>
<td>${bookblurrylist.book_name}</td>
<td>${bookblurrylist.isbn}</td>
<td>${bookblurrylist.category}</td>
<td>
<a href="${pageContext.request.contextPath}/BookServlet?m=bookInfo&book_id=${bookblurrylist.book_id}">修改</a>
<a href="${pageContext.request.contextPath}/BookServlet?m=delete&book_id=${bookblurrylist.book_id}" onclick="return confirm('您確定要刪除嗎？');">刪除</a>
</td>
</tr>
</c:forEach>
</form>
<br>
</div>
</body>
</html>
編寫書籍列表頁面，booklist.jsp
<%--
Created by IntelliJ IDEA.
User: JYH
Date: 2020/6/20
Time: 21:48
To change this tbooklate use File | Settings | File Tbooklates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>圖書列表</title>
<style> table,table tr th,table tr td{ border:1px solid #000; text-align:center; } table{ width:600px; border-collapse:collapse; } #addbook{ width:600px; height:50px; } #addbook p{ padding-top:5px; padding-left:480px; } a{ text-decoration:none; } </style>
</head>
<body>
<div align="center">
<h3>所有圖書列表</h3>
<div id="addbook">
<p><a href="${pageContext.request.contextPath}/views/addbook.jsp">添加圖書</a></p>
<p><a href="${pageContext.request.contextPath}/views/blurrynamebook.jsp">書名關鍵字查詢</a></p>
</div>
<br><br>
<table>
<tr>
<td>圖書編號</td>
<td>圖書名稱</td>
<td>ISBN編號</td>
<td>圖書類別</td>
<td>選擇操作</td>
</tr>
<c:forEach items="${bookList}" var="booklist">
<tr>
<td>${booklist.book_id}</td>
<td>${booklist.book_name}</td>
<td>${booklist.isbn}</td>
<td>${booklist.category}</td>
<td>
<a href="${pageContext.request.contextPath}/BookServlet?m=bookInfo&book_id=${booklist.book_id}">修改</a>
<a href="${pageContext.request.contextPath}/BookServlet?m=delete&book_id=${booklist.book_id}" onclick="return confirm('您確定要刪除嗎？');">刪除</a>
</td>
</tr>
</c:forEach>
</table>
${null_err}
<div>
<a href="${pageContext.request.contextPath}/BookServlet?m=selectAll&pageUp=pageUp">上一頁</a>
<a href="${pageContext.request.contextPath}/BookServlet?m=selectAll&pageDown=pageDown">下一頁</a>
</div>
</div>
</body>
</html>
編寫書籍更新頁面，updatebook.jsp
<%--
Created by IntelliJ IDEA.
User: JYH
Date: 2020/6/20
Time: 21:31
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<title>更新圖書</title>
</head>
<body>
<div align="center">
<h3>修改圖書</h3>
<form action="${pageContext.request.contextPath}/BookServlet?m=update" method="post">
<table>
<tr>
<td>圖書編號</td>
<td><input type="text" name="book_id" value="${b.book_id}" readonly="readonly"></td>
</tr>
<tr>
<td>圖書名稱</td>
<td><input type="text" name="book_name" value="${b.book_name}"></td>
</tr>
<tr>
<td>ISBN編號</td>
<td><input type="text" name="isbn" value="${b.isbn}"></td>
</tr>
<tr>
<td>圖書類別</td>
<td><input type="text" name="category" value="${b.category}"></td>
</tr>
</table>
<input type="submit" value="修改"> <input type="reset" value="重置">
</form>
</div>
</body>
</html>
在 web 文件夾下操作
更改 index.jsp 代碼，完善程序入口
<%-- Created by IntelliJ IDEA. --%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>歡迎使用圖書管理系統</title>
</head>
<body>
<div align="center">
<h3><a href="views/addbook.jsp">添加圖書</a></h3>
<h3><a href="BookServlet?m=selectAll">查詢所有圖書</a></h3>
<h3><a href="views/blurrynamebook.jsp">圖書名稱關鍵字查詢圖書</a></h3>
<%--<h3><a href="views/updatebook.jsp">更新圖書</a></h3>--%>
</div>
</body>
</html>