# amitrajitbose/employee_management_system architecture

> Architecture diagram of the GitHub repository amitrajitbose/employee_management_system, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-09). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/amitrajitbose/employee_management_system
- Repository: https://github.com/amitrajitbose/employee_management_system

## Overview

This is a Java/JSP employee (student-record) management web app, with a separately bundled Freelancer portfolio/contact page. The main workflow sends browser requests to a servlet that dispatches list, add, load, update, and delete operations; JDBC persists records, and JSPs render the list or edit form. The frontend contact form separately validates submissions and posts to PHP mail handling. Source excerpts establish the servlet, data-access, model, and contact-mail relationships; the JSP and HTML contents were not sampled, so their internal wiring is not inferred.

Main entry points: [`src/com/luv2code/web/jdbc/StudentControllerServlet.java`](https://github.com/amitrajitbose/employee_management_system/blob/master/src/com/luv2code/web/jdbc/StudentControllerServlet.java) (CRUD controller), [`src/com/luv2code/web/jdbc/StudentDbUtil.java`](https://github.com/amitrajitbose/employee_management_system/blob/master/src/com/luv2code/web/jdbc/StudentDbUtil.java) (Student data access), [`WebContent/frontend/index.html`](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/index.html) (Portfolio page), [`WebContent/frontend/js/contact_me.js`](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/js/contact_me.js) (Contact form behavior)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_management["Record management"]
  node_controller["CRUD controller"]
  node_student_model["Student record<br/>[Student.java]"]
  node_list_view["Student list view<br/>[list-students.jsp]"]
  node_add_view["Add form"]
  node_update_view["Update form"]
end

subgraph group_persistence["Persistence"]
  node_db_util["Student data access<br/>[StudentDbUtil.java]"]
  node_mysql[("MySQL database")]
end

subgraph group_portfolio["Portfolio site"]
  node_portfolio_page["Portfolio page<br/>[index.html]"]
  node_portfolio_behavior["Portfolio interactions<br/>[freelancer.js]"]
end

subgraph group_contact["Contact handling"]
  node_contact_form["Contact form behavior<br/>[contact_me.js]"]
  node_validation["Form validation"]
  node_mail_handler["Mail handler<br/>[contact_me.php]"]
  node_mail_service(("Mail service"))
end

node_browser(("Browser user"))

node_browser -->|"requests CRUD"| node_controller
node_controller -->|"dispatches operations"| node_db_util
node_controller -->|"constructs records"| node_student_model
node_db_util -->|"maps rows"| node_student_model
node_db_util -->|"queries and writes"| node_mysql
node_controller -->|"forwards list"| node_list_view
node_controller -->|"forwards edit form"| node_update_view
node_browser -.->|"opens form"| node_add_view
node_browser -->|"opens portfolio"| node_portfolio_page
node_portfolio_page -.->|"uses interactions"| node_portfolio_behavior
node_portfolio_page -.->|"offers contact"| node_contact_form
node_contact_form -->|"validates fields"| node_validation
node_contact_form -->|"posts submission"| node_mail_handler
node_mail_handler -->|"sends email"| node_mail_service

click node_controller "https://github.com/amitrajitbose/employee_management_system/blob/master/src/com/luv2code/web/jdbc/StudentControllerServlet.java"
click node_student_model "https://github.com/amitrajitbose/employee_management_system/blob/master/src/com/luv2code/web/jdbc/Student.java"
click node_list_view "https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/list-students.jsp"
click node_add_view "https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/add-student-form.jsp"
click node_update_view "https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/update-student-form.jsp"
click node_db_util "https://github.com/amitrajitbose/employee_management_system/blob/master/src/com/luv2code/web/jdbc/StudentDbUtil.java"
click node_portfolio_page "https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/index.html"
click node_portfolio_behavior "https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/js/freelancer.js"
click node_contact_form "https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/js/contact_me.js"
click node_validation "https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/js/jqBootstrapValidation.js"
click node_mail_handler "https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/mail/contact_me.php"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_controller,node_student_model,node_list_view,node_add_view,node_update_view,node_browser toneBlue
class node_db_util,node_mysql toneAmber
class node_portfolio_page,node_portfolio_behavior toneMint
class node_contact_form,node_validation,node_mail_handler,node_mail_service toneRose
```

## Components

### Record management

- [CRUD controller](https://github.com/amitrajitbose/employee_management_system/blob/master/src/com/luv2code/web/jdbc/StudentControllerServlet.java): `src/com/luv2code/web/jdbc/StudentControllerServlet.java`
- [Student record](https://github.com/amitrajitbose/employee_management_system/blob/master/src/com/luv2code/web/jdbc/Student.java): `src/com/luv2code/web/jdbc/Student.java`
- [Student list view](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/list-students.jsp): `WebContent/list-students.jsp`
- [Add form](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/add-student-form.jsp): `WebContent/add-student-form.jsp`
- [Update form](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/update-student-form.jsp): `WebContent/update-student-form.jsp`

### Persistence

- [Student data access](https://github.com/amitrajitbose/employee_management_system/blob/master/src/com/luv2code/web/jdbc/StudentDbUtil.java): `src/com/luv2code/web/jdbc/StudentDbUtil.java`
- **MySQL database**

### Portfolio site

- [Portfolio page](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/index.html): `WebContent/frontend/index.html`
- [Portfolio interactions](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/js/freelancer.js): `WebContent/frontend/js/freelancer.js`

### Contact handling

- [Contact form behavior](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/js/contact_me.js): `WebContent/frontend/js/contact_me.js`
- [Form validation](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/js/jqBootstrapValidation.js): `WebContent/frontend/js/jqBootstrapValidation.js`
- [Mail handler](https://github.com/amitrajitbose/employee_management_system/blob/master/WebContent/frontend/mail/contact_me.php): `WebContent/frontend/mail/contact_me.php`
- **Mail service**

### Other components

- **Browser user**

## Connections

- Browser user → CRUD controller: requests CRUD (evidence: `src/com/luv2code/web/jdbc/StudentControllerServlet.java`)
- CRUD controller → Student data access: dispatches operations (evidence: `src/com/luv2code/web/jdbc/StudentControllerServlet.java`)
- CRUD controller → Student record: constructs records (evidence: `src/com/luv2code/web/jdbc/StudentControllerServlet.java`)
- Student data access → Student record: maps rows (evidence: `src/com/luv2code/web/jdbc/StudentDbUtil.java`)
- Student data access → MySQL database: queries and writes (evidence: `src/com/luv2code/web/jdbc/StudentDbUtil.java`)
- CRUD controller → Student list view: forwards list (evidence: `src/com/luv2code/web/jdbc/StudentControllerServlet.java`)
- CRUD controller → Update form: forwards edit form (evidence: `src/com/luv2code/web/jdbc/StudentControllerServlet.java`)
- Browser user → Add form: opens form
- Browser user → Portfolio page: opens portfolio (evidence: `README.md`)
- Portfolio page → Portfolio interactions: uses interactions
- Portfolio page → Contact form behavior: offers contact
- Contact form behavior → Form validation: validates fields (evidence: `WebContent/frontend/js/contact_me.js`)
- Contact form behavior → Mail handler: posts submission (evidence: `WebContent/frontend/js/contact_me.js`)
- Mail handler → Mail service: sends email (evidence: `WebContent/frontend/mail/contact_me.php`)