Spring download file from url

Using byte array This is quite straight forward approach where we will use getForObject method to get a byte array from the remote service. Autowired; import org. RestTemplateBuilder; import org. GetMapping; import org. RestController; import org. RequestCallback; import org. ResponseExtractor; import org. TaskExecutor is an interface that abstracts the execution of a Runnable.

Resource from org. Set the responseType to arraybuffer to specify the type of data contained in the response. If you need to download a huge file from the server's file system, then ByteArrayResource can take all Java heap space. In that case, you can use FileSystemResource. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 5 years, 9 months ago. Active 7 months ago. Viewed k times. I am trying to download a file from a Spring boot rest service. Add a comment. Active Oldest Votes. I am trying to do it for word document. Any suggestion? We will be using MySql for this quick tutorial. While downloading multiple files, we will also have an implementation to zip all the files in a single unit and then download it from the spring boot server.

We will also look into how to send extra params with form data while uploading the files. 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. Here we will see following three methods to download a file directly to the client easily:. StreamingResponseBody is a functional interface. It can also be used as the assignment target for a method reference or a lambda expression. Here is Spring boot example to download a file but this code can also be used spring MVC as well.