[Graduation Project] Luliang seabuckthorn juice sales system based on Servlet

1.Project introduction

Luliang seabuckthorn juice is a healthy drink made from seabuckthorn fruit, a specialty of Luliang area. Sea buckthorn fruit is rich in vitamin C, vitamin E, carotene and other nutrients. It has the effects of improving immunity, protecting cardiovascular health and antioxidant, and is favored by consumers.

However, the current sales channels for Luliang seabuckthorn juice on the market are relatively limited, and it is inconvenient for consumers to purchase Luliang seabuckthorn juice. The traditional physical store sales model faces space constraints and time constraints, and cannot meet consumers' anytime purchase needs. Therefore, it is of great significance to design and implement a Servlet-based Luliang seabuckthorn juice sales system.

By designing and implementing a Servlet-based Luliang seabuckthorn juice sales system, the company's sales efficiency can be improved, users' purchasing needs can be met, and user satisfaction can be improved. At the same time, it can also provide data analysis and decision support, providing a scientific basis for the company's sales management. Therefore, this system has important practical significance and application value.

2. Development technology

2.1 The Servlet

Servlet is a technology of the Java programming language used for developing Web applications. It is a Java program executed on the server side that can receive and process requests sent by the client (usually a browser), and then generate and return corresponding data.

The following are some features and uses of Servlets:

(1) Dynamic web page generation: Servlet can dynamically generate web page content by processing requests and generating responses. It can be combined with front-end technologies such as HTML, CSS, and JavaScript to achieve flexible web page display and interaction.

(2) Server-side processing: Unlike traditional static web pages, Servlets are executed on the server side. It can access the database, call other Java class libraries, and perform business logic processing on the server to generate dynamic content.

(3) Network request processing: Servlet can handle various types of network requests, such as GET, POST, PUT, etc. It can obtain parameters and form data from the request, perform corresponding operations, and generate response data.

(4) Life cycle management: The Servlet container is responsible for managing the life cycle of the Servlet, including initialization, request processing and destruction. Developers can override the Servlet's life cycle methods to perform necessary operations.

(5) Multi-thread support: The Servlet container creates a new thread for each request, allowing the Servlet to process multiple requests at the same time, improving the concurrency performance of the system.

(6) Security support: Servlet provides a security mechanism for user authentication and access control. Developers can configure Servlet security constraints to protect sensitive data and resources.

Servlet technology is a commonly used part of Java Web development and is widely used to build various types of Web applications, such as e-commerce websites, social media platforms, enterprise management systems, etc. It provides a flexible and extensible way to handle requests and generate responses, allowing developers to build feature-rich, high-performance web applications.

2.2JSP technology

JSP (JavaServer Pages) is a Java technology used to develop dynamic web pages. It allows embedding Java code in HTML pages, allowing developers to generate dynamic content in a more concise and readable way.

The following are some features and uses of JSP technology:

(1) Dynamic content generation: JSP allows Java code to be embedded into HTML pages and <% ... %>perform dynamic operations through script tags. Developers can use Java code to generate dynamic content such as database queries, data processing, and business logic.

(2) Simplify the development process: Compared with traditional Servlet programming, JSP provides a more concise and easy-to-read development method. By embedding Java code into HTML pages, developers can intuitively write and modify dynamic content, improving development efficiency.

(3) Separation of front-end and back-end: JSP allows developers to separate front-end pages and back-end logic. Static content in HTML pages is written by front-end developers, while dynamic content is implemented by back-end developers using JSP.

(4) Standardized technology: JSP is part of Java technology and has good cross-platform and cross-browser compatibility. It follows the JavaEE specification and can run on a variety of servers that support JSP.

(5) Support tag library: JSP provides the function of custom tag library, allowing developers to encapsulate commonly used functions and complex logic into reusable tags. This reduces code redundancy and improves code maintainability.

(6) MVC architecture support: JSP can be used in combination with other Java technologies (such as Servlet, JavaBean) to implement the MVC (Model-View-Controller) architecture. JSP is used for view display, Servlet is used for control logic, and JavaBean is used for data processing, making the Web application more structured and maintainable.

JSP technology is widely used in Java Web development, and is especially suitable for developing web pages with more dynamic content. Compared with traditional HTML pages, it provides more powerful functions and flexibility, allowing developers to quickly build feature-rich and easy-to-maintain Web applications.

2.3Html and CSS

HTML (Hyper Text Markup Language) and CSS (Cascading Style Sheets) are the two core technologies for Web front-end development. HTML is used to define the content and structure of the page, while CSS is used to define the style and layout of the page.

Here are some features and uses of HTML and CSS:

(1) HTML: HTML is a markup language used to define the content and structure of Web pages. It uses tags and attributes to describe various elements in the page, such as titles, paragraphs, images, links, etc. HTML is the foundation of Web development, enabling developers to create structured, semantic documents.

(2) CSS: CSS is a style sheet language used to define the style and layout of Web pages. It uses selectors and attributes to control the style of various elements in the page, such as fonts, colors, margins, layout, etc. CSS gives developers greater control over the appearance and layout of pages, improving user experience.

(3) Separate content and style: HTML and CSS enable developers to separate the content and style of web pages, thereby improving the maintainability and reusability of the code. HTML is responsible for describing the structure and content of a page, while CSS is responsible for describing the appearance and layout of a page. This way, when styles are adjusted or changed, the HTML content does not need to be modified.

(4) Responsive layout: CSS provides the capability of responsive layout, allowing the page to adapt to different devices and screen sizes. By using technologies such as media queries and flexboxes, developers can achieve flexible layouts and an excellent user experience.

(5) Standardized technology: HTML and CSS follow W3C standards and have good cross-platform and cross-browser compatibility. This enables developers to write standards-compliant code and run it on a variety of devices and browsers.

(6) Rich ecosystem: HTML and CSS have huge communities and ecosystems, and developers can easily access various open source libraries, frameworks and tools to improve development efficiency and quality.

HTML and CSS are essential technologies for Web front-end development. They provide developers with the ability to create structured, beautiful, and responsive web pages. With the continuous development of Web technology, the functions of HTML and CSS are also constantly expanding, making Web development more flexible and excellent.

2.4JavaScript

JavaScript is a scripting language widely used in web development to add interactivity and dynamic functionality to web pages. It is a supplement to HTML and CSS, and achieves various functions and effects by embedding JavaScript code in web pages.

Here are some features and uses of JavaScript:

(1) Client-side scripting language: JavaScript runs in the user's browser and is a client-side scripting language. It can directly operate the content and structure of web pages, interact with users, and add dynamic effects, form verification, event processing and other functions to web pages.

(2) Dynamic web page effects: JavaScript can operate the elements of the web page through the DOM (Document Object Model), change its style, content and attributes, thereby achieving various dynamic effects, such as animation, element display and hiding, content switching, etc.

(3) Form validation: JavaScript can verify input data before the user submits the form. By writing validation logic, you can check whether the form fields are empty, whether the input format is correct, etc., improving user experience and data accuracy.

(4) Event processing: JavaScript can respond to user interactions through event handlers, such as clicks, scrolling, mouse movements and other events. Developers can write event handlers to perform corresponding operations, such as changing the style of elements, displaying prompt information, etc.

(5) AJAX: JavaScript can use AJAX (Asynchronous JavaScript and XML) technology to communicate asynchronously with the server. By sending HTTP requests and processing responses, functions such as updating page content without refreshing, obtaining server data and dynamically displaying it can be achieved.

(6) Browser compatibility: JavaScript is a cross-browser scripting language, supported by almost all mainstream browsers. Developers can write JavaScript code that is compatible with multiple browsers to ensure consistency across different platforms.

(7) Application development: JavaScript is not limited to web development, but can also be used to develop various types of applications, including desktop applications, mobile applications, and games. By using JavaScript frameworks and libraries such as React, Vue.js, and Node.js, developers can build powerful, efficient applications.

JavaScript is an integral part of web front-end development. It enables web pages to achieve rich and diverse interactive effects and provide users with a better experience. At the same time, JavaScript is constantly evolving and developing, providing developers with more tools and technologies, making web applications more powerful and innovative.

2.5JDBC

JDBC (Java Database Connectivity) is an API (Application Programming Interface) provided by Java for interacting with the database. It provides a set of classes and interfaces that enable developers to connect and operate various types of relational databases through Java programs.

The following are some features and uses of JDBC:

(1) Database connection: JDBC allows developers to establish connections with databases through Java code. By providing information such as the database's URL, username, and password, developers can use the JDBC API to establish a connection to the database and perform subsequent database operations.

(2) SQL execution: JDBC provides methods and interfaces for executing SQL statements. Developers can send SQL statements to the database through the JDBC API and obtain execution results. This includes operations such as querying data, inserting, updating, and deleting data.

(3) Transaction management: JDBC provides support for transaction management. Developers can use the JDBC API to start, commit, or rollback transactions to ensure the consistency and integrity of database operations.

(4) Database metadata: JDBC allows developers to obtain database metadata information, such as table structure, column information, indexes, etc. By using the JDBC API, developers can dynamically obtain and analyze the structural information of the database.

(5) Precompilation and batch processing: JDBC supports precompiled SQL statements and batch processing operations. By precompiling SQL statements, you can improve the performance of database operations. Batch processing operations allow multiple SQL statements to be executed at one time, reducing the number of communications with the database and improving efficiency.

(6) Data source management: JDBC provides the concept of data source (DataSource), which can handle database connections by configuring and managing data sources. The data source can provide connection pooling, connection pool management and connection parameter settings, thereby improving the efficiency and reliability of database connections.

JDBC is Java's standard API for connecting to databases, providing developers with a convenient and reliable way to operate relational databases. By using JDBC, developers can interact with the database in Java applications and perform various database operations, such as query, update, transaction management, etc. At the same time, JDBC also supports a variety of database drivers, allowing developers to connect and operate various types of relational databases, such as MySQL, Oracle, SQL Server, etc.

3. Development tools

3.1 Idea

Idea is an integrated development environment (IDE) developed by JetBrains and used for developing various types of software applications, especially Java. It is a powerful, flexible and easy-to-use IDE that is widely used for Java development and other programming languages.

Here are some features and functions of Idea:

Intelligent code editing: Idea provides intelligent code editing functions, which can provide automatic completion, code navigation, refactoring and other functions based on context and grammatical rules. It has powerful code analysis capabilities that can detect code errors, provide improvement suggestions, and support rapid repair and optimization of code.
Rich plug-in ecosystem: Idea supports plug-in extensions, and its functionality can be enhanced by installing plug-ins. JetBrains company and community developers provide a large number of plug-ins covering various development needs, such as version control, build tools, framework integration, etc.
Built-in build tools: Idea integrates commonly used build tools, such as Maven and Gradle, and can perform operations such as project building, dependency management, and test running directly in the IDE. This allows developers to complete the entire development process in a unified interface.
Version control integration: Idea has built-in support for multiple version control systems, such as Git, Subversion, and Mercurial. Developers can use the IDE to perform common operations such as code version control, branch management, and merging to improve team collaboration efficiency.
Debugging and testing tools: Idea provides powerful debugging and testing tools, supporting breakpoint debugging, variable monitoring, unit testing and other functions. Developers can easily debug and test code in the IDE, and quickly locate and fix problems.
Code quality analysis: Idea can perform static analysis on the code, detect potential problems and coding guideline violations, and provide suggestions for improvement. It supports commonly used code quality tools, such as FindBugs and Checkstyle, to help developers improve code quality and maintainability.
Supports multiple programming languages: In addition to Java, Idea also supports the development of other programming languages, such as Kotlin, Python, JavaScript, HTML/CSS, etc. It provides corresponding syntax highlighting, code completion, debugging and other functions to facilitate developers to conduct multi-language development in one IDE.
User-friendly interface: Idea designed an intuitive and customizable user interface that developers can personalize to their preferences and workflow. At the same time, it also provides a wealth of shortcut keys and operation methods to speed up developers' work efficiency.

Idea is a powerful, highly customizable integrated development environment popular among developers. It provides a wealth of functions and tools, supports the development of multiple programming languages and technology stacks, allowing developers to write, debug and test code more efficiently, and improve code quality and development efficiency.

3.2Mysql

MySQL is a popular relational database management system that is widely used in Internet application development, enterprise information management, and data analysis. MySQL is an open source software developed and maintained by Oracle Corporation.

The following are some features and functions of MySQL:

Supports multiple operating systems: MySQL can run on multiple operating systems, such as Windows, Linux, Mac, etc.
Multi-language support: MySQL supports interfaces in multiple programming languages, such as C, C++, Java, Python, PHP, etc.
Easy to install and use: MySQL provides tools that are easy to install and use, such as MySQL Workbench, phpMyAdmin, etc., allowing users to easily manage and query the database.
High performance and scalability: MySQL uses efficient storage engines, such as InnoDB, MyISAM, etc., with high performance and scalability. It also supports a variety of distributed architectures, such as master-slave replication, sharding, etc.
Data security and integrity: MySQL provides a variety of security control mechanisms, such as user authentication, access control, encrypted transmission, etc., to ensure data security and integrity. It also provides transaction support and data backup mechanisms to prevent data loss or damage.
Good visual interface: MySQL Workbench provides an intuitive visual interface, allowing users to easily perform database design, query and management operations.
Open Source Software: MySQL is an open source software that allows users to use, modify, and distribute it for free.

MySQL is a powerful relational database management system with high performance, scalability and good security. It also provides interfaces in multiple programming languages and easy-to-use tools, allowing users to easily perform database design, query, and management operations.

3.3Navicat

Navicat is a powerful database management tool that supports a variety of relational databases, such as MySQL, MariaDB, SQL Server, Oracle, PostgreSQL, etc. It is a commercial software developed by PremiumSoft company.

The following are some features and functions of Navicat:

Multiple database support: Navicat supports multiple relational databases, including MySQL, MariaDB, SQL Server, Oracle, PostgreSQL, etc. This allows users to manage multiple databases in one interface.
Database design and modeling: Navicat provides powerful database design and modeling tools that can help users quickly create and modify database structures. It also supports reverse engineering and can automatically generate ER diagrams or database models from existing databases.
Data import and export: Navicat provides easy-to-use data import and export tools, which can import data from one database to another, or export data to CSV, Excel, JSON, XML and other formats. This allows users to easily perform data migration and backup operations.
Data query and editing: Navicat provides powerful data query and editing functions, which can help users quickly query and modify data in the database. It supports functions such as SQL editor, visual query builder, data filtering and sorting.
Data synchronization and backup: Navicat provides data synchronization and backup functions, which can help users maintain data consistency between multiple databases. It also supports automatic backup and scheduled backup functions to ensure data security.
Visual interface: Navicat provides an intuitive visual interface, allowing users to easily manage and operate databases. It also supports multi-window mode, custom toolbars, shortcut keys and other functions to improve user work efficiency.
Multi-language support: Navicat supports multiple language interfaces, including Chinese, English, Japanese, French, German, etc., to meet the needs of different users.

Navicat is a powerful database management tool with multiple database support, database design and modeling, data import and export, data query and editing and other functions. It provides an intuitive visual interface and multi-language support to facilitate users' database management and operation.

4.Function module

The functional design of Luliang seabuckthorn juice sales system based on Servlet includes the following modules:

(1) User registration and login module: Users can use the system by registering an account, and can log in using an existing account.

(2) Product display and search module: The system should be able to display various product information of Luliang sea buckthorn juice, and provide search and filtering functions to facilitate users to find products of interest.

(3) Shopping cart management module: Users can add products of interest to the shopping cart and add, delete, modify and check the items in the shopping cart.

(4) Order management module: After the user places an order, the system should be able to generate an order and provide order management functions, including order payment, order status inquiry, order cancellation, etc.

(5) User personal information management module: Users can view and modify personal information, such as delivery address, contact information, etc.

(6) Backend management module: Administrators can log in to the system’s backend management interface to perform operations such as product management, order management, and user management.