How to Best Store and Retrieve Images in a Java Web Application?

How to Store and Retrieve Images in a Java Web Application

In this Java web application tutorial, we'll explore the best practices for storing and retrieving images on a server to avoid database congestion.

Save Image on Server

To save an image on the server, determine a suitable location:

• Fixed Path Outside Tomcat Webapps: Ideal for maximum control. Configure through VM argument or environment variable and retrieve programmatically.
• Temp File: Create a temporary file within the Tomcat webapps folder for immediate storage.

Retrieve and Display Image

Once the image is saved, consider these options for retrieval:

• Serve from Separate Context: Add the upload location as a separate Context in Tomcat to access the image directly via URL.
• Store Path in Database: Store the image's path in the database and use it to retrieve the image at runtime.
• Use Amazon S3 or Database: If server configuration is limited, store the image on Amazon S3 or in a database.

Sample Code

To upload an image using the specified path:

Path folder = Paths.get(System.getProperty("upload.location"));
String filename = FilenameUtils.getBaseName(uploadedFile.getName());
String extension = FilenameUtils.getExtension(uploadedFile.getName());
Path file = Files.createTempFile(folder, filename + "-");

Conclusion

Choosing the appropriate image storage and retrieval method depends on server configuration and control. Utilize fixed paths for maximum flexibility or consider alternative storage options such as Amazon S3 or the database when necessary.

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