Online bookstore system based on jsp+servlet+mysql

The login page

User registration

Books add

Book information management

Add book pictures

User information management

Technical description

development tool ： Idea/Eclipse
database ： mysql
Jar Warehouse ： Jar package
Front frame ：jquery/Jsp
Back end framework ： Jsp/Servlet

package com.tenton.servlet;

import com.tenton.pojo.Book;
import com.tenton.service.BookService;
import com.tenton.service.Impl.BookServiceImpl;
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.math.BigDecimal;

/**
 * @Date: 2021/1/19
 * @Author: Tenton
 * @Description:  According to the user Id Delete user 
 */
@WebServlet(name = "AddBookServlet",urlPatterns = "/addBookServlet")
public class AddBookServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // Set the encoding format , Prevent confusion code 
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=UTF-8");

        BookService bookService = new BookServiceImpl();
        // The book Id
        String bookId = request.getParameter("id");
        int id = 0;
        // Determine whether it is null , Then it is transformed into int type 
        if(bookId !=null && !bookId.equals("")){
            id = Integer.parseInt(bookId);
        }
        // The name of the book 
        String bookName = request.getParameter("bookName");
        // author 
        String author = request.getParameter("author");
        // Press. 
        String press = request.getParameter("press");
        // Book unit price 
        String bookPrice = request.getParameter("price");
        BigDecimal price = new BigDecimal(bookPrice);
        // Number 
        int num = Integer.parseInt(request.getParameter("num"));
        // Book illustrations   route 
        String image = request.getParameter("image");
        if (id > 0) {
            // Create a Book Entity , Save the value passed from the front end 
            Book book = new Book(id, bookName, author, press, price, num, image);
            int result = bookService.insertBook(book);
            // Judge whether the addition is successful 
            if (result > 0) {
                response.getWriter().print("<script>alert(' Add success !')</script>");
                response.sendRedirect("/listBookServlet");
            } else {
                response.getWriter().write(" Add failure ,2 Seconds later, it will automatically jump to the main interface ");
                response.setHeader("Refresh", "3;URL=/listBookServlet");
            }
        }
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request,response);
    }
}

package com.tenton.servlet;

import com.tenton.pojo.User;
import com.tenton.service.Impl.UserServiceImpl;
import com.tenton.service.UserService;

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;

/**
 * @Date: 2021/1/19
 * @Author: Tenton
 * @Description:  Query all users 
 */
@WebServlet(name = "ListUserServlet",urlPatterns = "/listUserServlet")
public class ListUserServlet extends HttpServlet {
    @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 {
        // Set the encoding format , Prevent confusion code 
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=UTF-8");

        UserService userService = new UserServiceImpl();
        // Get all user information 
        List<User> users = userService.listUser();
        // Store the obtained user information in the linked list request domain , Pass it on to the front end 
        request.setAttribute("users",users);
        // Request forwarding to userManager page 
        request.getRequestDispatcher("/userManager.jsp").forward(request,response);
    }
}