How to implement the Little Bee loudspeaker online mall system in Java-javaTutorial-php.cn

Table of Contents

1. Project Brief

2. Project operation

3. Rendering

Home

Java

javaTutorial

How to implement the Little Bee loudspeaker online mall system in Java

王林

Apr 18, 2023 pm 01:13 PM

java

1. Project Brief

User function module: User registration: User login: Product module: Order module; Backend management system function: Administrator module: Product module: Order management module;

2. Project operation

1. Running environment

JDK1.8 Tomcat8.5 MYSQL Eclispe (Eclispe, MyEclispe, Sts, IntelliJ IDEA are all supported, you can configure it by yourself)

2. Technology stack

JSP Servlet JDBC Ajax JavaScript CSS DBUtil etc.

3. Rendering

How to implement the Little Bee loudspeaker online mall system in Java

#4. Core code

User management control layer

public class UserServlet extends BaseBackServlet {
 
    @Override
    public String add(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了 UserServlet add方法");
        return null;
    }
 
    @Override
    public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了 UserServlet delete方法");
 
        int id = Integer.parseInt(request.getParameter("id"));
        userDAO.delete(id);
        return "@admin_user_list";
    }
 
    @Override
    public String update(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了 UserServlet update方法");
 
        Map<String, String> params = new HashMap<>();
        InputStream is = super.parseUpload(request, params);
        System.out.println(params);
 
        int id = Integer.parseInt(params.get("id"));
        String password = params.get("password");
 
        User user = userDAO.get(id);
        user.setPassword(password);
 
        userDAO.update(user);
 
        return "@admin_user_list";
    }
 
    @Override
    public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了 UserServlet edit方法");
 
        int id = Integer.parseInt(request.getParameter("id"));
        User u = userDAO.get(id);
 
        request.setAttribute("u", u);
 
        return "admin/editUser.jsp";
    }
 
    @Override
    public String list(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了 UserServlet list方法");
 
        List<User> us = userDAO.list(page.getStart(), page.getCount());
        int total = userDAO.getTotal();
        page.setTotal(total);
 
        request.setAttribute("us", us);
        request.setAttribute("page", page);
 
        return "admin/listUser.jsp";
    }
}

Copy after login

Order management control layer

public class OrderServlet extends BaseBackServlet {
 
    @Override
    public String add(HttpServletRequest request, HttpServletResponse response, Page page) {
        return null;
    }
 
    @Override
    public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {
        return null;
    }
 
    @Override
    public String update(HttpServletRequest request, HttpServletResponse response, Page page) {
        return null;
    }
 
    @Override
    public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {
        return null;
    }
 
    public String delivery(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了 OrderServlet delivery方法");
 
        int id = Integer.parseInt(request.getParameter("id"));
        Order o = orderDAO.get(id);
        o.setDeliveryDate(new Date());
        o.setStatus(OrderDAO.waitConfirm);
        orderDAO.update(o);
        return "@admin_order_list";
    }
 
    @Override
    public String list(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了 OrderServlet list方法");
 
        // 对订单对应的订单项进行初始化
        List<Order> os = orderDAO.list(page.getStart(), page.getCount());
        orderItemDAO.fill(os);
 
        int total = orderDAO.getTotal();
        page.setTotal(total);
 
        request.setAttribute("os", os);
        request.setAttribute("page", page);
 
        return "admin/listOrder.jsp";
    }
}

Copy after login

Category control layer

public class CategoryServlet extends BaseBackServlet {
 
    @Override
    public String add(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了category add方法");
 
        Map<String,String> params = new HashMap<>();
        InputStream is = super.parseUpload(request, params);
 
        System.out.println(params);
        String name = params.get("name");
        Category c = new Category();
        c.setName(name);
        categoryDAO.add(c);
 
        File imageFolder = new File(request.getSession().getServletContext().getRealPath("img/category"));
        File file = new File(imageFolder, c.getId() + ".jpg");
 
        try{
            if(null != is && 0 != is.available()){
                try(
                        FileOutputStream fos = new FileOutputStream(file);
                        ){
                    byte[] b = new byte[1024 * 1024];
                    int length = 0;
                    while(-1 != (length = is.read(b))){
                        fos.write(b, 0, length);
                    }
                    fos.flush();
                    //通过以下代码，将文件保存为jsp格式
                    BufferedImage img = ImageUtil.change2jpg(file);
                    ImageIO.write(img, "jpg", file);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "@admin_category_list";
    }
 
    @Override
    public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了category delete方法");
        int id = Integer.parseInt(request.getParameter("id"));
        categoryDAO.delete(id);
        return "@admin_category_list";
    }
 
    @Override
    public String update(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了category update方法");
 
        Map<String,String> params = new HashMap<>();
        InputStream is = super.parseUpload(request, params);
 
        System.out.println(params);
        String name = params.get("name");
        int id = Integer.parseInt(params.get("id"));
 
        Category c = new Category();
        c.setName(name);
        c.setId(id);
        categoryDAO.update(c);
 
        File imageFolder = new File(request.getSession().getServletContext().getRealPath("img/category"));
        File file = new File(imageFolder, c.getId() + ".jpg");
 
        try{
            if(null != is && 0 != is.available()){
                try(
                        FileOutputStream fos = new FileOutputStream(file);
                ){
                    byte[] b = new byte[1024 * 1024];
                    int length = 0;
                    while(-1 != (length = is.read(b))){
                        fos.write(b, 0, length);
                    }
                    fos.flush();
                    //通过以下代码，将文件保存为jsp格式
                    BufferedImage img = ImageUtil.change2jpg(file);
                    ImageIO.write(img, "jpg", file);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "@admin_category_list";
    }
 
    @Override
    public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了category edit方法");
 
        int id = Integer.parseInt(request.getParameter("id"));
        Category category = categoryDAO.get(id);
        request.setAttribute("c", category);
        return "admin/editCategory.jsp";
    }
 
    @Override
    public String list(HttpServletRequest request, HttpServletResponse response, Page page) {
        List<Category> cs = categoryDAO.list(page.getStart(), page.getCount());
        int total = categoryDAO.getTotal();
        page.setTotal(total);
 
        request.setAttribute("thecs", cs);
        request.setAttribute("page", page);
 
        return "admin/listCategory.jsp";
    }
}

Copy after login

Product control layer

public class ProductServlet extends BaseBackServlet {
 
    @Override
    public String add(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了Product add方法");
 
        Map<String, String> params = new HashMap<>();
        InputStream inputStream = super.parseUpload(request, params);
        System.out.println(params);
 
        int cid = Integer.parseInt(params.get("cid"));
        Category c = categoryDAO.get(cid);
 
        String name = params.get("name");
        String subTitle = params.get("subTitle");
        float originalPrice = Float.parseFloat(params.get("originalPrice"));
        float promotePrice = Float.parseFloat(params.get("promotePrice"));
        int stock = Integer.parseInt(params.get("stock"));
 
        Product p = new Product();
 
        p.setCategory(c);
        p.setName(name);
        p.setSubTitle(subTitle);
        p.setOriginalPrice(originalPrice);
        p.setPromotePrice(promotePrice);
        p.setStock(stock);
        p.setCreateDate(new Date());
 
        productDAO.add(p);
        return "@admin_product_list?cid=" + cid;
    }
 
    @Override
    public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了Product delete方法");
 
        int id = Integer.parseInt(request.getParameter("id"));
        Product p = productDAO.get(id);
        productDAO.delete(id);
        return "@admin_product_list?cid=" + p.getCategory().getId();
    }
 
    @Override
    public String update(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了Product update方法");
 
        Map<String, String> params = new HashMap<>();
        InputStream inputStream = super.parseUpload(request, params);
 
        int cid = Integer.parseInt(params.get("cid"));
        Category c = categoryDAO.get(cid);
 
        int id = Integer.parseInt(params.get("id"));
        String name = params.get("name");
        String subTitle = params.get("subTitle");
        float originalPrice = Float.parseFloat(params.get("originalPrice"));
        float promotePrice = Float.parseFloat(params.get("promotePrice"));
        int stock = Integer.parseInt(params.get("stock"));
 
        Product p = new Product();
 
        p.setId(id);
        p.setName(name);
        p.setSubTitle(subTitle);
        p.setOriginalPrice(originalPrice);
        p.setPromotePrice(promotePrice);
        p.setStock(stock);
        p.setCategory(c);
        p.setCreateDate(new Date());
 
        productDAO.update(p);
        return "@admin_product_list?cid=" + p.getCategory().getId();
    }
 
    @Override
    public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了Product edit方法");
 
        int id =Integer.parseInt(request.getParameter("id"));
        Product p = productDAO.get(id);
        request.setAttribute("p",p);
        return "admin/editProduct.jsp";
    }
 
    public String updatePropertyValue(HttpServletRequest request, HttpServletResponse response, Page page){
        System.out.println("调用了Product updatePropertyValue方法");
 
        int  pvid = Integer.parseInt(request.getParameter("pvid"));
        String value = request.getParameter("value");
 
        PropertyValue pv = propertyValueDAO.get(pvid);
        pv.setValue(value);
 
        propertyValueDAO.update(pv);
 
        return "%success";
    }
 
    public String editPropertyValue(HttpServletRequest request, HttpServletResponse response, Page page){
        System.out.println("调用了Product editPropertyValue方法");
 
        int id = Integer.parseInt(request.getParameter("id"));
        Product p = productDAO.get(id);
        request.setAttribute("p", p);
 
        // 初始化属性，将产品对应的属性全部
        propertyValueDAO.init(p);
 
        List<PropertyValue> pvs = propertyValueDAO.list(p.getId());
 
        request.setAttribute("pvs", pvs);
 
        return "admin/editPropertyValue.jsp";
    }
 
    @Override
    public String list(HttpServletRequest request, HttpServletResponse response, Page page) {
        System.out.println("调用了Product list方法");
 
        int cid = Integer.parseInt(request.getParameter("cid"));
        Category c = categoryDAO.get(cid);
 
        List<Product> ps = productDAO.list(cid, page.getStart(), page.getCount());
 
        int total = productDAO.getTotal(cid);
        page.setTotal(total);
        page.setParam("&cid=" + c.getId());
 
        request.setAttribute("ps", ps);
        request.setAttribute("c", c);
        request.setAttribute("page", page);
 
        return "admin/listProduct.jsp";
    }
}

Copy after login

The above is the detailed content of How to implement the Little Bee loudspeaker online mall system in Java. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

R.E.P.O. Best Graphic Settings

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Assassin's Creed Shadows: Seashell Riddle Solution

2 weeks ago By DDD

R.E.P.O. How to Fix Audio if You Can't Hear Anyone

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

R.E.P.O. Chat Commands and How to Use Them

1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Where is the login entrance for gmail email?

7530

CakePHP Tutorial

1379

What is the format of the account name of steam

win11 activation key permanent

nyt connections hints and answers

Related knowledge

Perfect Number in Java Aug 30, 2024 pm 04:28 PM

Guide to Perfect Number in Java. Here we discuss the Definition, How to check Perfect number in Java?, examples with code implementation.

Random Number Generator in Java Aug 30, 2024 pm 04:27 PM

Guide to Random Number Generator in Java. Here we discuss Functions in Java with examples and two different Generators with ther examples.

Weka in Java Aug 30, 2024 pm 04:28 PM

Guide to Weka in Java. Here we discuss the Introduction, how to use weka java, the type of platform, and advantages with examples.

Smith Number in Java Aug 30, 2024 pm 04:28 PM

Guide to Smith Number in Java. Here we discuss the Definition, How to check smith number in Java? example with code implementation.

Java Spring Interview Questions Aug 30, 2024 pm 04:29 PM

In this article, we have kept the most asked Java Spring Interview Questions with their detailed answers. So that you can crack the interview.

Break or return from Java 8 stream forEach? Feb 07, 2025 pm 12:09 PM

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is

TimeStamp to Date in Java Aug 30, 2024 pm 04:28 PM

Guide to TimeStamp to Date in Java. Here we also discuss the introduction and how to convert timestamp to date in java along with examples.

Java Program to Find the Volume of Capsule Feb 07, 2025 am 11:37 AM

Capsules are three-dimensional geometric figures, composed of a cylinder and a hemisphere at both ends. The volume of the capsule can be calculated by adding the volume of the cylinder and the volume of the hemisphere at both ends. This tutorial will discuss how to calculate the volume of a given capsule in Java using different methods. Capsule volume formula The formula for capsule volume is as follows: Capsule volume = Cylindrical volume Volume Two hemisphere volume in, r: The radius of the hemisphere. h: The height of the cylinder (excluding the hemisphere). Example 1 enter Radius = 5 units Height = 10 units Output Volume = 1570.8 cubic units explain Calculate volume using formula: Volume = π × r2 × h (4

See all articles