Tip: use multipart-form-data in your Java code
After hours and hours of searching for a way to download file attachments from an API POST request, I finally put together bits and pieces of different Stack Overflow and blog posts to get it working.
This should not be that hard. And honestly, it wasn’t.
I used this inside of my Spring project, but the logic will still be the same across other types of Java projects.
I will also show you how to test the endpoint using Postman.
The objective is to download a file attachment sent from an API POST request.
If you would like to follow along, I suggest using the following tools:
- Visual Studio Code, IntelliJ, or Eclipse for the code editor/IDE
- Postman
We are first going to set up our REST endpoint. It is a simple PostMapping which will reside in our Controller.java class.
