[Graduation Project] Home Furnishing Sales System Based on Servlet

1.Project introduction

With the development of the economy and the improvement of people's living standards, the home furnishing market has gradually become an industry with broad prospects. More and more people are beginning to pay attention to the quality of home products and their personalized needs, so the home sales market is becoming more and more popular.

However, there are some problems with the traditional home sales model. For example, purchasing household products requires going to a physical store or searching for purchase channels online, which takes a lot of time and energy. At the same time, household sellers also face restrictions on sales channels and find it difficult to expand the sales market. In addition, the logistics during the purchase process There are also certain inconveniences in information tracking.

Therefore, it is very necessary and promising to establish a home sales system based on Servlet. The system can conveniently and quickly provide users with purchase channels for home products, and help home sellers expand sales channels and improve sales efficiency and profits. In addition, through the system's logistics information function, users can also easily understand the delivery progress of goods and improve their shopping experience.

Therefore, the design and implementation of a Servlet-based home sales system is a meaningful research direction.

2.Technical introduction

2.1Java language

Java is an object-oriented programming language introduced in 1995 by Sun Microsystems (now Oracle Corporation). It is designed to be simple, portable and high-performance and is widely used in various fields, especially enterprise-level application development.

The following are some features and functions of the Java language:

Easy to learn: Java's syntax design is relatively simple, making it easier to learn and understand than other programming languages. It follows the object-oriented programming paradigm and provides rich class libraries and APIs to simplify the development process.
Platform independence: Java is a cross-platform programming language that can run on different operating systems, such as Windows, Linux, macOS, etc. This is because Java programs generate bytecode (bytecode) after compilation and then run on the Java Virtual Machine (JVM).
Object-oriented: Java is a pure object-oriented programming language that supports object-oriented features such as encapsulation, inheritance, and polymorphism. It allows developers to create complex class hierarchies and object-relational models, providing good code reusability and maintainability.
Memory management: Java automatically handles memory allocation and recycling, and developers do not need to manually manage memory. Java's garbage collection mechanism can automatically detect and recycle objects that are no longer used, improving the robustness and reliability of the program.
Multi-threading support: Java supports multi-threaded programming and can perform multiple tasks simultaneously. It provides thread management and synchronization mechanisms to facilitate developers to write multi-threaded applications and implement concurrent and asynchronous operations.
Powerful class libraries and APIs: Java provides a wealth of standard class libraries and APIs, covering various functions required for application development, such as graphical interfaces, network communications, database connections, security, etc. Developers can directly use these libraries and APIs to quickly build applications.
Security: Java has strong security features to prevent malicious code from causing damage to the system. It provides a security manager and security sandbox to limit program permissions and prevent unauthorized access and operations.

Java is widely used in software development in various fields, such as enterprise applications, desktop applications, mobile applications, embedded systems, etc. It occupies an important position in enterprise-level application development and is used to develop large-scale, high-performance and scalable systems. At the same time, Java also has a huge community and ecosystem, which provides a wealth of tools, frameworks and development resources, providing developers with great convenience and support.

2.2Servlet

Servlet is a Java component used to develop web applications. It runs on the server side and handles requests from clients and generates responses. Servlets are usually written as Java classes and run on the server.

The following are some features and functions of Servlet:

Server-side programming: Servlet is a server-side programming model, which runs on the server. When the client sends a request, the server calls the corresponding Servlet to process the request and generate a response.
Processing HTTP requests: Servlets are mainly used to process requests based on the HTTP protocol, including GET requests and POST requests. It can read request parameters, process form data, access databases and other operations.
Dynamically generate responses: Servlets can dynamically generate responses based on client requests. It can generate various types of response content such as HTML pages, XML documents, JSON data, etc.
Life cycle management: Servlet has a life cycle management mechanism, including initialization, request processing and destruction processes. When the Servlet is requested for the first time, the server will call its initialization method; when each request arrives, the server will call its request processing method; when the server is shut down or the Servlet is no longer needed, the server will call its destruction method.
Concurrency processing: The Servlet container (such as Tomcat) is responsible for managing the concurrent request processing of Servlets. It can handle multiple requests simultaneously and create a separate thread for each request. This enables the Servlet to handle multiple concurrent requests efficiently.
Reusability and extensibility: Servlets can be shared and reused by multiple web applications. They can be developed as independent components and used in different applications. In addition, Servlet also supports mechanisms such as filters and listeners to enhance its functionality and scalability.
Security: The Servlet container provides a security mechanism that can authenticate and authorize the Servlet to ensure that only authorized users can access the Servlet.

Various types of web applications can be built using Servlets, such as e-commerce websites, social media platforms, online banking systems, etc. It is one of the most commonly used technologies in Java enterprise-level development, and is used in conjunction with other Java technologies (such as JSP, JavaBean, database connections, etc.) to form a complete Web application architecture.

2.3JDBC

JDBC (Java Database Connectivity) is the standard interface for Java language to operate databases. It provides a set of classes and methods for connecting to and operating various types of relational databases.

The following are some features and functions of JDBC:

Database connection: JDBC allows Java applications to establish connections with databases. Through JDBC, applications can use standard database connection URL, user name, password and other information to connect to the database server.
SQL execution: JDBC provides the function of executing SQL statements. Applications can use JDBC's Statement or PreparedStatement objects to perform SQL operations such as query, insert, update, and delete.
Result set processing: JDBC supports returning query results to the application as a result set. Applications can use ResultSet objects to obtain query results and process and operate on the results.
Transaction management: JDBC supports transaction management, which can combine a series of database operations into a transaction unit. Applications can use JDBC's transaction management API to control the commit or rollback of transactions.
Metadata access: JDBC provides the function of accessing database metadata (such as tables, fields, indexes, etc.). Applications can use JDBC's DatabaseMetaData object to obtain the structural information of the database.
Batch operations: JDBC supports batch operations and can execute multiple SQL statements at one time. This is very useful for scenarios where a large number of similar operations need to be performed and can improve the efficiency of database operations.
Driver: JDBC uses database-specific drivers to connect and operate the database. Each database needs to provide a corresponding JDBC driver to communicate with the database.

The JDBC usage process generally includes the following steps:

Load the database driver: Use the Class.forName() method to load the database driver and register it in the JVM.
Establish a database connection: Use the DriverManager.getConnection() method to establish a connection with the database and obtain a Connection object.
Create a Statement or PreparedStatement object: Use the Connection object to create a Statement or PreparedStatement object for executing SQL statements.
Execute SQL operations: Use Statement or PreparedStatement objects to execute SQL statements, such as queries, inserts, updates, and deletes.
Processing query results: If a query operation is performed, you can use the ResultSet object to obtain the query results and process the results.

Release resources: After using the JDBC object, you need to call the corresponding close() method to release the resources and close the database connection.

JDBC is the standard interface for Java to interact with relational databases, and can interact with almost all mainstream relational databases (such as MySQL, Oracle, SQL Server, etc.). It provides Java developers with a unified, flexible and reliable way to access and operate databases.

3. Development tools

3.1 IDEA

IntelliJ IDEA is an integrated development environment (IDE) developed by JetBrains for the development of Java, Kotlin and many other programming languages. It provides powerful features and tools to help developers write, debug and deploy applications more efficiently.

Here are some of the key features and capabilities of IntelliJ IDEA:

Intelligent code editing: IntelliJ IDEA has powerful code completion, automatic error correction and refactoring functions, and can intelligently provide code suggestions and optimization based on context.
Rich plug-in ecosystem: IntelliJ IDEA supports a variety of plug-ins and extensions to meet different development needs. Users can customize the IDE according to their preferences and project needs to enhance development efficiency.
Powerful debugging and testing tools: IntelliJ IDEA provides comprehensive debugging tools that support breakpoint settings, variable monitoring, expression evaluation and other functions to help developers quickly locate and solve problems. It also integrates a unit testing framework to simplify the testing process.
Version control integration: IntelliJ IDEA has built-in support for various version control systems (such as Git, SVN, etc.) and provides intuitive interfaces and operations to facilitate team collaboration and code management for developers.
Built-in build tools: IntelliJ IDEA integrates commonly used build tools, such as Maven and Gradle, making project construction and dependency management more convenient.
Highly customizable: IntelliJ IDEA allows users to personalize the interface, shortcut keys, and coding style according to their own needs, providing flexible customization options.
Other auxiliary functions: IntelliJ IDEA also provides many other useful functions, such as code templates, code review tools, performance analyzers, etc., to enhance the development experience and increase productivity.

In short, IntelliJ IDEA is a powerful, flexible and customizable Java development tool. It provides rich features and tools to help developers write, debug and deploy applications more efficiently. Whether it is a personal project or team collaboration, IntelliJ IDEA can provide a good development environment and workflow support, and is widely welcomed and respected by Java developers.

3.2Mysql database

MySQL is an open source relational database management system (RDBMS) developed by Swedish MySQL AB and maintained and supported by Oracle. It is one of the most popular open source databases and is widely used in web application development.

The following are some features and functions of MySQL database:

Relational database: MySQL is a database based on the relational model, using tables to organize and store data. It supports SQL language and can perform complex query, insert, update and delete operations.
Scalability: MySQL supports large-scale data sets and high concurrent access. It can handle hundreds or even thousands of concurrent connections on a single server and achieves horizontal scalability through a distributed architecture.
Multi-user support: MySQL allows multiple users to access the database at the same time, and provides a rich permission management mechanism to ensure data security and integrity.
High performance: MySQL has an efficient data storage and retrieval mechanism and can quickly respond to query requests. It also supports indexing, caching, query optimization and other technologies, providing good performance.
Data replication and high availability: MySQL supports data replication, which can copy data from the master server to multiple slave servers, providing data redundancy and disaster recovery mechanisms. It also supports automatic failover and active-standby mode to improve database availability and reliability.
Supports multiple storage engines: MySQL supports multiple storage engines, such as InnoDB, MyISAM, Memory, etc. Different storage engines have different characteristics and applicable scenarios. You can choose the appropriate storage engine according to your needs.
Cross-platform support: MySQL can run on different operating systems, including Windows, Linux, macOS, etc., providing cross-platform development and deployment capabilities.

MySQL is widely used in various web applications, such as e-commerce websites, social media platforms, blogs, etc. It has the advantages of open source, free, easy to learn and use, and provides rich tool and document support, making it one of the preferred databases for developers. At the same time, MySQL is constantly developing and improving, introducing new features and performance optimizations to meet growing data processing needs.

3.3Tomcat server

Tomcat is an open source Java Servlet container and a lightweight web application server. It is developed and maintained by the Apache Software Foundation and is one of the most commonly used Java web application servers.

The following are some features and functions of Tomcat server:

Servlet container: Tomcat is a container that supports Java Servlet and JavaServer Pages (JSP) and can run web applications based on Java technology. It follows the Java Servlet and JavaServer Pages specifications and provides functions for processing HTTP requests and responses.
High performance: Tomcat uses asynchronous non-blocking I/O and multi-thread processing mechanisms, with good performance and throughput. It also supports load balancing and cluster deployment and can handle large numbers of concurrent requests.
Lightweight: Tomcat is a lightweight web server that takes up less resources and starts quickly. Its core functions focus on the Servlet container and do not contain other complex functions. It is suitable for small and medium-sized Web applications.
Easy to configure and manage: Tomcat provides simple and easy-to-understand configuration files to easily configure web applications and server settings. It also provides a visual management interface to facilitate users to monitor, deploy and manage applications.
Security: Tomcat provides powerful security features, including authentication, access control, SSL/TLS support, etc. It supports the use of digital certificates for secure communication, protecting data and transmission security of web applications.
Extensibility: Tomcat supports plug-ins and extensions, which can meet specific needs by adding additional functional modules. Users can choose appropriate extensions according to their own needs to enhance the functions and performance of Tomcat.
Cross-platform support: Tomcat can run on multiple operating systems, including Windows, Linux, macOS, etc., providing cross-platform development and deployment capabilities.

Tomcat is widely used in the field of Java Web development and is one of the preferred servers for Java Web applications. It has the advantages of open source, free, simple and easy to use, and has a large user community that provides rich documentation and support resources. At the same time, Tomcat is constantly updated and improved, introducing new features and performance optimizations to meet the changing needs of web application development.

4.Function module

The functional design of the design and implementation of a Servlet-based home sales system can include the following aspects:

(1) User registration and login: Users can create accounts through the registration function, and perform identity verification and access control through the login function.

(2) Product browsing and search: Users can browse the categories, details and pictures of home products, and can also search for specific products by keywords.

(3) Shopping cart management: Users can add products of interest to the shopping cart and manage the shopping cart, including adding, modifying and deleting products.

(4) Order generation and management: Users can generate orders for the items in the shopping cart and perform order management, including viewing order details, order status tracking, and order cancellation.

(5) Payment processing: Users can choose the appropriate payment method to pay to ensure payment security and smooth process.

(6) Backend management: Administrators can log in to the backend management system to manage and monitor products, orders, users, etc., including adding, editing, deleting product information, reviewing orders, etc.