Hello there, dear friends.

In this video, we will implement the product update operation. So, let's get started. To update any product, first, we have to get the product by ID and show values on a new page. First, add a new HTML page and name it UpdateProduct. Now, we can copy from the AddProduct page. Actually, you may use the AddProduct page for this operation if you like, but as I mentioned previously, we are new to Spring. Thus, I want to add another page for better understanding. Now, paste it into the UpdateProduct page. On this page, we have to add a hidden input for the ID field. As you know with ID, we will update our product. Now, open the AdminController. In this page, we need a method to access the UpdateProduct page. This will take an ID parameter. So, like the delete method, we need the path variable property.

Now, mapping will be ("/UpdateProduct/{id}"). Okay, done. Now, open product service implementation. We have to override the getProduct by ID method. In this method, we will call the findById method of the product repository. We don't need to override any methods for updating. To update a product, we will use the save method. Return to the AdminController now. Now, in the update method, we will call the getProduct by ID method. Set product to the model. Now, redirect this page to the admin product list page.

Okay, that's enough. When we run the project with the Update button, we can see the product details. After making changes and pressing the 'Save' button, all changes will be saved. Let's try. Login with admin. Now, I want to update the second one. Look, all details of the product is on the page. Let's change all of them. Now, save. Look, the list page now shows all of the updates. This is how the update process works. We're now done with this video. In the following video, we'll perform a sale operation on the employee product list page. So, I'll see you there.