How I save and retrieve an image on my server in a java webapp [duplicate]

by

instead of writing it to my C drive I’m going to run it on the server, but where should I store the image to later retriev and display in an xhtml file?

That depends on how much control you have over configuring the server. Ideal would be to configure a fixed path outside the Tomcat webapps folder. For example, /var/webapp/upload. You can set this path as a VM argument or environment variable so that your webapp can retrieve it programmatically without the need to change the code.

For example, when specifying as VM argument -Dupload.location=/var/webapp/upload, you can complete the upload as follows:

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 + "-", "." + extension);

try (InputStream input = uploadedFile.getInputStream()) {
    Files.copy(input, file, StandardCopyOption.REPLACE_EXISTING);
}

String uploadedFileName = file.getFileName().toString();
// Now store it in DB.

As to serving the file back, most ideal would be to add the upload location as a separate <Context> to Tomcat. E.g.

<Context docBase="/var/webapp/upload" path="/uploads" />

This way you can access it directly by http://example.com/uploads/foo-123456.ext

If you have zero control over configuring the server, then, well, storing in the DB or sending to a 3rd party host such as Amazon S3 is your best bet.

See also:

More Related Contents:

  1. How to get UTF-8 working in Java webapps?
  2. MySQL JDBC Driver 5.1.33 – Time Zone Issue
  3. How to configure Tomcat to connect with MySQL
  4. Retrieve an Image stored as BLOB on a MYSQL DB
  5. java.sql.SQLException: Before start of result set [duplicate]
  6. MySQLSyntaxErrorException near “?” when trying to execute PreparedStatement
  7. Java: Rotating Images
  8. “EEE MMM dd HH:mm:ss ZZZ yyyy” date format to java.sql.Date
  9. Can I connect to SQL Server using Windows Authentication from Java EE webapp?
  10. How to embed Tomcat 6?
  11. Tomcat request timeout
  12. How to add image in a TextView text?
  13. Resizing image in Java
  14. Including Images with an executable jar
  15. How do you specify the root context in your tags in web.xml?
  16. Passing parameters to a JDBC PreparedStatement
  17. extract images from pdf using pdfbox
  18. How can I use MySQL assign operator(:=) in hibernate native query?
  19. JFileChooser filters
  20. Tomcat 7.0.73 doesn’t work with java 9
  21. How to add text to an image in java?
  22. Enum in Hibernate, persisting as an enum
  23. EL expressions won’t executed in Tomcat 5.5, but working in tomcat 6.0.20
  24. Adding external resources to class-path in Tomcat 8
  25. Watermarking with PDFBox
  26. java.lang.OutOfMemoryError: Java heap space with NetBeans
  27. Extract Image from PDF using Java
  28. Cannot convert current canvas data into image in java
  29. Tomcat: Cache-Control
  30. Test if a file is an image file

Leave a Comment