How to Build an Employee Management App with Spring Boot, Rest API and MySQL | Step-by-Step Tutorial

Welcome to this comprehensive tutorial on building an Employee Management Application from scratch using Spring Boot, REST API, and MySQL. Whether you're a seasoned developer or just starting your coding journey, this step-by-step guide will help you create a robust and efficient system.
🚀 GitHub Repository:
github.com/tsd...
🚀 Mastering Exception Handling with Mockito: A Comprehensive Guide:
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In this tutorial, I cover everything you need to know, including project setup, database configuration, entity creation, repository, service layer, RESTful endpoints, exception handling, and much more. By the end of this video, you'll have a fully functional employee management system that you can use as a foundation for your own projects.
🔥 *Topics Covered:*
1. Introduction to the Tutorial
2. Project Setup with Spring Initializer
3. Creating the MySQL Database Schema
4. Configuring MySQL in the Application
5. Package and Class Structure
6. Creating the Entity Class
7. Detailed Explanation of Entity Annotations
8. Repository Interface Creation and Usage
9. Service Layer Implementation
10. RESTful Endpoints with Dependency Injection
11. Handling Exceptions
12. Flow Summary
13. Building and Running the Application
14. Fixing Hibernate Naming Strategy
15. Testing with Postman
*Error Handling Note:* In this tutorial, I've covered the basics of creating an Employee Management API. For a comprehensive guide on handling errors, including scenarios like the 'NotFoundException,' check out our dedicated video 'Mastering Error Handling in Spring Boot Rest API: Best Practices':
Error Handling Video: • Mastering Error Handli...
*Missed Points in the Video:*
1. About the Employee class (around 9 minutes): We apologize for not explicitly mentioning that the attributes in the Employee class correspond to columns in the Employee table in our database. Each attribute we define represents a specific column. For instance, `firstName` corresponds to the 'First_Name' column, and `lastName` corresponds to 'Last_Name.'
2. @12:34 - For auditing purposes, it's crucial to have the system automatically capture certain values. Imagine we want to know who created a record and when it was created. Rather than manually entering this information, which can be prone to errors, we can configure our JPA entities to automatically handle this for us. This ensures that our data remains accurate and reliable.
Follow along with the tutorial, and you'll be amazed at how quickly you can create a powerful employee management application. Don't forget to like, share, and subscribe for more programming tutorials!
🚀 Ready to dive in? Let's get started! 💻
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#hibernate naming_strategy #employeemanagement #postmantesting #programming #programmingjourney #learning #learntocode #javaspringtutorial

[@TechSoftDot]

Missed Points in the Video:
1. About the Employee class (around 9 minutes): We apologize for not explicitly mentioning that the attributes in the Employee class correspond to columns in the Employee table in our database. Each attribute we define represents a specific column. For instance, firstName corresponds to the 'First_Name' column, and lastName corresponds to 'Last_Name.'
2. @12:34 - For auditing purposes, it's crucial to have the system automatically capture certain values. Imagine we want to know who created a record and when it was created. Rather than manually entering this information, which can be prone to errors, we can configure our JPA entities to automatically handle this for us. This ensures that our data remains accurate and reliable.

[@naglaaahmed4553]

I loved the video so much it’s created in a very professional way. The tutorial is so organized and detailed very helpful for anyone who needs a crash course to refresh his memory about how to build APIs for CRUD operations using Spring boot. Beginners will need to pause from while to while to catch up. The only missing scenario in Postman is the NotFoundException test. Other than that is an amazing reference for the API concepts. Thank you Thilagam and good job.

[@TechSoftDot]

Thank you for your feedback! We're glad you found this tutorial helpful. Regarding the missing NotFoundException test, I've got you covered! I've created a dedicated video that goes deep into error handling in Spring Boot REST APIs, and it includes scenarios like NotFoundException.
You can check it out here: ruclips.net/video/7kngDy5Djow/видео.htmlsi=oyqWd3IujOMG2nVG.
I hope you find it valuable. If you have any more questions or suggestions, feel free to let me know. Happy coding!"

[@vijenderreddy3787]

Very good Content, and clear explanation. Thanks for this video and it’s very helpful.

[@TechSoftDot]

Thank you so much for your kind words! I'm delighted to hear that you found the content valuable and the explanations clear. It's comments like yours that motivate me to keep creating helpful videos. If you have any more questions or if there are specific topics you'd like to see covered in the future, please feel free to let me know. Your feedback is greatly appreciated, and I'm here to assist you with your learning journey. Happy coding! 🚀👨‍💻📚

[@MuthuKrishnan-oo4et]

Great video! Love your style of explaining abstract concepts and making it quite simple to understand.

[@TechSoftDot]

Thank you so much for your kind words and positive feedback! 🙌 We're thrilled to hear that you found the video helpful and our explanations easy to understand. Making abstract concepts accessible is one of our top priorities, and your appreciation motivates us to keep creating valuable content.
If you have any questions or if there's anything specific you'd like to see in future videos, please feel free to let us know. We're here to help and to make your learning experience as enjoyable as possible.
Thanks again for your support, and stay tuned for more content coming your way! 🚀

[@slsganesh2280]

getting error in service class while setting orElseThrow() 22:28 in the video. like The method orElseThrow(Object) in the type Employee is not applicable for the arguments (() -> {})

[@TechSoftDot]

Thank you for reaching out, and I appreciate your engagement with the tutorial. I understand that you're encountering an issue with the orElseThrow method. The error message "The method orElseThrow(Object) in the type Employee is not applicable for the arguments (() -> {})" suggests that there might be a mismatch in the lambda expression.
Let's make sure the UserNotFoundException is imported correctly, and the orElseThrow lambda expression is set up properly. Here's the corrected code snippet:
public Employee findEmployeeById(Long id) {
return employeeRepository.findByEmployeeId(id)
.orElseThrow(() -> new UserNotFoundException("User by id " + id + " was not found"));
}
Ensure that you have the correct import statement for UserNotFoundException. If the issue persists, please double-check the syntax of the lambda expression. It should be in the form () -> exceptionObject.
If the problem persists, feel free to share the specific code snippet where the error is occurring, and I'll do my best to assist you further.
Happy coding!

[@selvamsrinivasan7064]

My background is data and I was trying to get an understanding about Spring Boot. I found this video as simple and easy to follow. Nice step by step process for Spring Boot, database connection, exception handling, etc. Gracefully handling exception is critical and nice job explaining this as well with an example. Thank you for taking time to educating us, great service.

[@TechSoftDot]

Thank you so much for your kind words! 🙏 I'm thrilled to hear that you found the video helpful.
Your feedback is highly appreciated, and I'm here to provide more educational content whenever needed. Thanks for watching and happy learning! 😊👨‍💻📚

[@mosihurrahman8897]

Data is not inserting in employees table? Only null value is inserting. What to do?

[@TechSoftDot]

It seems like you might be encountering an issue where the property names in the JSON payload don't match the corresponding fields in the Employee bean class. This can indeed result in null values being inserted into the database.
Please double-check the JSON payload you're sending to ensure that the keys match the field names in the Employee bean class exactly. If there are any differences, such as underscores in the JSON keys or variations in capitalization, they need to align with the field names in your Employee class.
If you're still facing difficulties after verifying the payload and making necessary adjustments, feel free to share more details or code snippets.

[@mosihurrahman8897]

I already checked twice but i think data is not stored in my database. In my database table only id is showing and rest all column field is showing null.

[@TechSoftDot]

@@mosihurrahman8897 I understand your frustration after checking multiple times without finding a solution. Let's work together to identify and resolve the issue with your data not being stored correctly in the database.
Your observation that only the ID is showing in the database table suggests there may be a specific issue with how the data is handled or persisted in your application. Here are some potential reasons and steps to investigate further:
Field Mappings: Double-check the mappings between your Employee entity class and the database table columns to ensure they match exactly in names and types.
Data Population: Verify that all fields in your Employee object are properly populated with data before attempting to save them to the database.
Validation Errors: Check for any validation errors during the data insertion process, as they could prevent the data from being saved correctly.
Database Constraints: Review the constraints defined on your database table, such as NOT NULL constraints, to ensure they align with the data you're trying to save.
Transaction Management: Confirm that transactions are managed correctly in your service layer to ensure changes are properly committed to the database.
By investigating these areas, we should be able to pinpoint the root cause of why the other fields are not storing correctly. If you need further assistance, feel free to provide more details or code snippets, and we can continue troubleshooting together.

[@mosihurrahman8897]

@@TechSoftDot now It's working properly except put method. Should I make any changes on update method?

[@TechSoftDot]

@@mosihurrahman8897 It's great to hear that the issue with storing data properly has been resolved! Regarding the PUT method not working as expected, it's possible that there might be some adjustments needed in the update method to ensure it functions correctly.
Here are some considerations:
Request Payload: Double-check the payload structure and content you're sending in the PUT request. Ensure that it includes all necessary data fields required for updating an employee record.
Endpoint Mapping: Verify that the PUT request is being correctly mapped to the update method in your controller. The endpoint URL and method signature should align with the update functionality.
Data Processing: Ensure that the update method in your service layer correctly handles the incoming data and updates the corresponding employee record in the database. Check for any logic errors or inconsistencies in the update process.
Error Handling: Implement robust error handling mechanisms in your update method to gracefully manage any unexpected scenarios, such as invalid input or database connectivity issues.
Testing: Thoroughly test the update functionality with different scenarios and edge cases to identify any potential issues or bugs. This will help ensure the reliability and stability of your application.
If you've already implemented these steps and are still encountering issues with the PUT method, please provide more details or code snippets related to your update method so that i can offer more targeted assistance.

[@Mvsdiaries]

Mam I'm geeting error in controller class update (PutMapping) method (employee.setId(id); here I'm getting error , how to reslove that please tell me @TechSoftDot

[@TechSoftDot]

Can you please share more details about your error, and could you also provide the relevant code snippet from your update method? This will help me better understand the issue you're facing and allow me to provide more specific guidance to help you resolve it. Thank you!