Java spring download zip file

Sign Out View Profile. Over 2 million developers have joined DZone. This article demonstrates how to use a Spring Boot application and MySQL to maintain a database of uploaded files and their metadata. Like Join the DZone community and get the full member experience. Join For Free. Spring Boot dependencies Set up application. Opinions expressed by DZone contributors are their own. Integration Partner Resources. Improve this question.

I think you will have to use rb. So zip file is already there or you wish to create it on the fly? Also, one concern if full file needs to be in memory or needs to be streamed in chunks while downloading? I have to create the zip file on fly and to answer your second question is that full file needs to be in memory but we are restricting the download if it goes above MB.

Just a thought. Add a comment. Active Oldest Votes. Here is my working code I have used response. Improve this answer. How can we give the location to the zip file to be downloaded? Combine these two answers to get what you are trying to achieve.

Sabir Khan Sabir Khan 8, 6 6 gold badges 34 34 silver badges 79 79 bronze badges. Now I am able to create zip on fly and download it as well. Your welcome!! Its better that you update your question with your final working code so it helps others too. David Buck 3, 32 32 gold badges 27 27 silver badges 34 34 bronze badges. Below are the multipart configurations required in application. The default is 1MB. The default is 10MB. In this section, we will provide the different options of uploading the files in a spring boot app with suitable examples.

In this case, the file is sent as using Form data and the same is retrieved in the Spring controller Rest as a Multipart file. It is a representation of an uploaded file received in a multipart request. In the below implementation, we are Copying all bytes from an input stream to a file. By default, the copy fails if the target file already exists or is a symbolic link.

Once, this process is completed, the response will be the download URL of the file. We will discuss the file download in a moment. Below is the sample request that we can make to test this functionality from Postman. You can also use javascript or any other JS library to test it. The multiple files upload internally invokes above method to repeat the single file upload.

We can also have a functionality to upload a. To add an extra parameter with file upload, we can append that extra parameter in the form data at the client-side and the same can be retrieved as a request param at the server-side. Below is an example where we appended the key as extraParam in the form data at client-side. For this, we need to have a database configuration first.

Spring boot provides a very convenient way to do so by adding a few properties in application. We will be using spring data JPA for our purpose.