Develop And Implement An Employee Hiring Web App

Develop and implement an employee hiring Web appli

Develop and implement an employee hiring Web application using Model 2 architecture, that requires department and employee information from the user, stores the new employee personal and hiring data into flat files, and displays all the employees hired so far along with their relevant hiring data. The application must use flat text files Departments.txt, Employees.txt, and Hiring.txt to store and/or retrieve data. Departments.txt should contain pairs of department name and description, Employees.txt should contain quartets of employee name, job title, year hired, and gender, and Hiring.txt should contain pairs of employee name and department name.

The Web application's form should include a combo-box for selecting a department (with options: Human Resources, Software Development, Media Relations), four text boxes for entering employee's name, job title, year hired, and gender, and a submit button for processing the hiring. The application must utilize the Model 2 architecture, with JSP pages for view, a servlet acting as the controller, and JavaBean and ordinary Java classes as the model. Specifically, HiringServlet should serve as the controller. JSP pages form.jsp and confirmation.jsp should serve as the views. The model should include Employee, Department, and Hiring JavaBean classes, as well as HiringService and DepartmentService Java classes.

Ensure that the Departments.txt file is pre-populated with the specified departments before use, and that Employees.txt and Hiring.txt are populated through interactions with the web application. All input and output processing should be handled via the view, with input validation and business logic performed in the controller and model layers respectively. The project files should be submitted as a zip file named with your first initial and last name (e.g., StudentFirstInitialStudentLastNameProject2.zip), containing the design diagram, NetBeans project files, a test plan with scenarios and screenshots, architecture description, setup instructions including IDE and server details, and SQL scripts with execution instructions.

Paper For Above instruction

The development of a web-based employee hiring application following the Model 2 architecture pattern embodies a structured approach to separating concerns within web development. This architecture distinguishes the user interface (view), core logic (model), and application flow control (controller), fostering maintainability and scalability.

The application employs JSPs (JavaServer Pages) such as form.jsp and confirmation.jsp as the view components, providing user interfaces for data input and confirmation of actions. The hiring form includes a combo-box for department selection, dynamically listing the predefined departments, and text boxes for entering employee-specific information such as name, job title, year hired, and gender. This user input is submitted to the HiringServlet, which acts as the controller, orchestrating data processing and validation.

The model comprises JavaBean classes—Employee, Department, and Hiring—that encapsulate data attributes and provide getter-setter methods. Additionally, utility classes like HiringService and DepartmentService manage data logic, including reading from and writing to flat text files. These classes abstract file handling mechanics, ensuring separation from the control and view layers.

The data files—Departments.txt, Employees.txt, and Hiring.txt—serve as persistent storage. Departments.txt is initialized with department data prior to application use, specifying the department name and description pairs. As employees are added, the system appends their data to Employees.txt and establishes their department association in Hiring.txt. This architecture allows the application to dynamically display the list of hired employees by reading from these files and presenting aggregated data in a list or table format on the JSP page.

The flow begins when users access form.jsp via an accessible URL configured in web.xml. Upon form submission, the servlet validates inputs, updates the flat files through the model classes, and redirects to confirmation.jsp, displaying updated hiring information. All business logic resides within the model classes, ensuring that JSPs focus solely on presentation logic, adhering to MVC principles.

Set up instructions involve opening the project in NetBeans IDE, configuring the server (Apache Tomcat or GlassFish), deploying the project, and ensuring the data files are correctly populated or updated. SQL scripts are optionally included for initializing database components if needed, although the primary storage mechanism for this project relies on flat files. Testing involves executing various hiring scenarios, verifying data persistence, and ensuring that the application accurately lists all hired employees with their associated department details. Test scenarios can simulate valid entries, missing fields, and invalid data, with corresponding screenshots documenting the application's response.

This architecture promotes clear separation of concerns, ease of maintenance, and scalability in enterprise-level web applications. It demonstrates effective integration of front-end JSPs, Java servlets for control, and JavaBeans for data encapsulation, all operating cohesively within the Model 2 pattern.

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