JThumbnail

JThumbnail is a Java library for creating Thumbnails of common types of file including .doc, .docx, .pdf , .mp4 etc. full list

• Project is under development!
• Check the v1 branch for Java 8 compatible version.
• Check the dev/** branches for latest commits on different under development version.
• Check the release/** branches for stable release versions
• master branch will always point to the latest available release version

Project Source: https://github.com/makbn/JThumbnail

How to use

String[] args = new String[]{};

JThumbnailer jThumbnailer = JThumbnailerStarter.init(args);

File in = new File("/inputFile.docx");

ThumbnailCandidate candidate = new ThumbnailCandidate(in,"unique_code");

jThumbnailer.run(candidate, new ThumbnailListener() {
     @Override
     public void onThumbnailReady(String hash, File thumbnail) {
        Files.copy(thumbnail.toPath(), Path.of("my_thumbnail_folder", thumbnail.getName()), StandardCopyOption.REPLACE_EXISTING);
     }

     @Override
     public void onThumbnailFailed(String hash, String message, int code) {
        // handle the situation
     }
});

// close thumbnailer
jThumbnailer.close();

Configuration Args

Configuration Args	Description
OPENOFFICE Properties
jthumbnailer.name	Application name, e.g. Java Thumbnail Generator
jthumbnailer.openoffice.port	Ports used by OpenOffice for document conversion
jthumbnailer.openoffice.timeout	Timeout for OpenOffice document conversion tasks
jthumbnailer.openoffice.max_tasks_per_process	Maximum number of conversion tasks allowed per OpenOffice process
jthumbnailer.openoffice.dir	Directory path to the OpenOffice installation
jthumbnailer.openoffice.tmp	Directory path for temporary files generated and used by OpenOffice
JTHUMBNAILER Properties
jthumbnailer.thumb_width	Width of generated thumbnails
jthumbnailer.thumb_height	Height of generated thumbnails
jthumbnailer.async.core_pool_size	Core pool size for the asynchronous processing tasks
jthumbnailer.async.max_pool_size	Maximum pool size for the asynchronous processing tasks
Spring
spring.servlet.multipart.max-file-size	Maximum allowed file size for multipart file uploads
spring.servlet.multipart.max-request-size	Maximum allowed request size for multipart file uploads
server.port	Port on which the application will be hosted
Spring Doc
springdoc.api-docs.path	Path for accessing the API documentation in JSON format
springdoc.swagger-ui.path	Path for accessing the Swagger UI for interactive API documentation

• All parameters can be passed through the environment variables. To pass a param as environment variable you need to remove the dots and make the first characters upper case. For example, jthumbnailer.openoffice.dir should be JthumbnailerOpenofficeDir.

Requirements

• Java JRE 17
• OpenOffice 4.x or LibreOffice 7.x

Supported File Formats

• Office files (doc, docx, xls, xlsx, ppt, pptx)
  • There is a problem with most xlsx files
• OpenOffice files (all of them)
• Text files (txt, pdf, rtf, html)
• Image files (jpg, png, bmp, gif)
• AutoCad files (dwg)
• MP3 files (user album-art as thumbnail)
• MPEG files (generate gif file)

Adding Repository

Maven

---

Step 1. Add the dependency to the pom file:

<dependency>
  <groupId>io.github.makbn</groupId>
  <artifactId>jthumbnail</artifactId>
  <version>2.2.0</version>
</dependency>

Gradle

---

Step 1. Add the dependency to the build.gradle file:

compile "io.github.makbn:jthumbnail:2.2.0"

TODO

• Update all dependencies from jar to maven
• update project old and deprecated dependencies
• Change the structure of project
• Add new Configuration method to config OpenOffice dir and port
• Add Async multi-thread support
• replace Thumbnailers for Microsoft Office documents with e-iceblue
• Fix problem with xlsx files
• Improve code quality
• Improve current Exception handling system
• Fix problem with Java 1.8 (current version is 17)
• Fixing issue with running test with the GitHub action

Original project

JThumbnail is based on an old project of the university of Siegen for the benefit of come_IN Computerclubs. and thanks a lot to @benjaminpick

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