Advanced Java Projects

This repository contains several Java web applications demonstrating servlet programming and database connectivity.

🚀 Projects Included

1. AddTwoServletINOnePackage - Two servlets in one package demonstrating basic servlet functionality
2. ArithmeticWebApp - Web application for arithmetic operations (addition, subtraction, multiplication, division)
3. ServletDemo - Basic servlet demonstration with GET/POST request handling
4. SessionManagement - Session management with login/logout functionality
5. InsertTableDemo - MySQL database connectivity demonstration

📋 Prerequisites

• Java 11 or higher
• Maven 3.6 or higher
• Apache Tomcat 10.x (for servlet projects)
• MySQL Server (for InsertTableDemo project)

🛠️ Building the Projects

Using Maven (Recommended)

1. Build all projects:

   mvn clean compile

2. Build individual projects:

   cd AddTwoServletINOnePackage
   mvn clean compile

3. Package WAR files:

   mvn clean package

🚀 Running the Projects

Servlet Projects

1. Deploy the generated WAR files to your Tomcat server
2. Access the applications through your browser:
   • http://localhost:8080/AddTwoServletINOnePackage/FirstServlet
   • http://localhost:8080/AddTwoServletINOnePackage/SecondServlet
   • http://localhost:8080/ArithmeticWebApp/
   • http://localhost:8080/ServletDemo/
   • http://localhost:8080/SessionManagement/

InsertTableDemo

1. Set up MySQL database:

   CREATE DATABASE jdbc_db;

2. Update database credentials in InsertDemo.java if needed:

   String url = "jdbc:mysql://localhost:3306/jdbc_db";
   String user = "root";
   String password = "your_password";

3. Run the application:

   cd InsertTableDemo
   mvn exec:java

📁 Project Structure

AdvanceJavaProjects/
├── pom.xml                          # Parent POM with dependency management
├── AddTwoServletINOnePackage/
│   ├── pom.xml
│   └── src/main/java/com/example/
│       ├── FirstServlet.java
│       └── SecondServlet.java
├── ArithmeticWebApp/
│   ├── pom.xml
│   └── src/main/java/com/example/
│       └── ArithmeticServlet.java
├── ServletDemo/
│   ├── pom.xml
│   └── src/main/java/com/example/
│       └── MyServlet.java
├── SessionManagement/
│   ├── pom.xml
│   └── src/main/java/com/example/servlets/
│       ├── LoginServlet.java
│       ├── DashboardServlet.java
│       └── LogoutServlet.java
└── InsertTableDemo/
    ├── pom.xml
    └── src/main/java/com/example/
        └── InsertDemo.java

📦 Dependencies

• Jakarta Servlet API 6.0.0 - For servlet projects
• MySQL Connector/J 8.2.0 - For database connectivity

🔧 Features

AddTwoServletINOnePackage

• Two servlets in one package
• Basic HTTP GET request handling
• HTML response generation

ArithmeticWebApp

• Arithmetic operations (+, -, *, /)
• Input validation
• Error handling for division by zero
• UTF-8 character support

ServletDemo

• GET and POST request handling
• Form data processing
• Parameter extraction
• HTML response generation

SessionManagement

• User authentication
• Session creation and management
• Login/logout functionality
• Dashboard with user information
• Session invalidation

InsertTableDemo

• MySQL database connectivity
• JDBC connection management
• Database connection testing

🐛 Troubleshooting

Common Issues

1. "The import jakarta cannot be resolved"

   • Ensure Maven dependencies are downloaded: mvn dependency:resolve
   • Check that your IDE is configured to use Maven

2. "MySQL connector not found"

   • Verify MySQL server is running
   • Check database credentials in InsertDemo.java
   • Ensure MySQL Connector JAR is in classpath

3. Servlet not found errors

   • Verify web.xml configuration
   • Check servlet mapping URLs
   • Ensure WAR file is properly deployed

📝 Notes

• All servlet projects use Jakarta EE 6.0.0 (the modern replacement for Java EE)
• Projects are configured for Java 11
• WAR files are generated with failOnMissingWebXml=false for convenience
• All projects include proper error handling and input validation

👨‍💻 Author

Abushahma736

• GitHub: @Abushahma736

📄 License

This project is open source and available under the MIT License.

---

Happy Coding! 🎉