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String fileName = new File(key). ResponseInputStream response = client.getObject(request) 1) First we have to set HttpServletResponse response to tell browser about system going to return an application file instead of normal html page. No matter you are using struts, JSP, Spring or whatever other java framework, the logic is same.
Java download file how to#
GetObjectRequest request = GetObjectRequest.builder() Here i show a simple java example to demonstrate how to let user download a file from website. S3Client client = S3Client.builder().build() String key = "Dir1/subdir1/Your file.doc" The file name is as same as the object key.If you use a key that looks like a directory path, consider the following example: String bucket = "your-bucket-name" And the file will be saved in the current directory (same as application’s directory).
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The typical steps are as follows: Read the file on the server using FileInputStream class. This would be useful for implementing file download functionality in your web application using Java servlet. Public static void main(String args) throws IOException To run this program, you must specify exactly the bucket name on your AWS account, the object key of file, and the AWS credentials you’re using has at least read permission on the file.In this example, the object key looks like it is directly underneath the bucket. The user can download the file by clicking on a hyperlink which points to the servlet URL. If not, follow this guide: How to setup AWS SDK for Java for Amazon S3 Development.Below is the code of a Java console program that downloads a file from a bucket on S3, and then saves the file on disk: package You can use the code example to add S3 file download function to your application.I suppose that you already have AWS SDK for Java set up on your computer. In this AWS Java SDK article, I’d like share some Java code examples about file download from a bucket on Amazon S3 programmatically.