Spring boot download excel file example

Create below entity class that maps to database table. Our entity class has only three fields employee id, employee first name and employee last name. I am creating entity class because I want to create a file from our database record and finally download the file using Spring REST service.

You can build any type of file, such as excel file, csv file etc. So create below Spring Data JPA Repository which provides most of our built-in methods to query database for fetching data. I fetch all employees from the database using the below service layer code. I annotate the service layer class using Service. I create service layer class to process our business logic to avoid any tight coupling between the layers.

I use the data type as array of byte stream in the response to download the file. File may be downloaded from a selected location using the server side code or you may generated a report file from database and download the report file using the Spring REST Controller.

Notice how I attach the file in the http header response so that file will be forced to download and give a pop-up for saving it. You must specify few things, such as, content length, content type, attachment with file name in order to download the file forcefully.

You can also have a file in the server side in any location and you can download the file directly without having to fetch data from MySQL database server. Then you do not need application. Your Email required. Your Message. Attach file. About WordPress. View AMP version. Repository class as InvoiceRepository. Please leave this field empty. Previous article.

Hello, Many thanks for this great guide on how to upload excel data into a db. Leave a Reply Cancel reply. Click on the Download button to download contacts. The source code in this article can be found at: github. Download Source Code. Introduction In this tutorial, we are going to learn how to implement a download function for a Spring Boot web application to allow users download excel files, which the Excel file content export from a MySQL database table.

On the New Spring Starter Project popup input new project information. Name: spring-boot-download-excel-mysql Group: dev. Entity ; import javax. GeneratedValue ; import javax. GenerationType ; import javax. Id ; import javax. This information helps the browser to inform to users of the size of content prepared to be downloaded. Therefore, while downloading the browser, it is possible to notify to users of the number of bytes downloaded, display percentage downloaded, estimate remaining time.

This information helps the browser to know which applications can open this content and suggest users to open by a program available on their computer when the content is downloaded successfully. Spring Boot File Upload Example. Write a method to return ResponseEntity.