Rotate pages
GroupDocs.Merger allows to change page rotation angle by setting it to 90, 180 or 270 degrees for specific or all document pages.
Here are the steps to change page rotation:
- Initialize RotateOptions class with desired rotation angle and page numbers;
- Instantiate Merger object with source document path or InputStream;
- Call rotatePages method and pass RotateOptions object to it;
- Call save method specifying file path to save resultant document.
The following code sample demonstrates how to change page rotation:
String filePath = "c:\sample.pdf";
String filePathOut = "c:\output\result.pdf";
RotateOptions rotateOptions = new RotateOptions(RotateMode.Rotate180, new int[] { 2, 3 });
Merger merger = new Merger(filePath);
merger.rotatePages(rotateOptions);
merger.save(filePathOut);
More resources
Advanced Usage Topics
To learn more about document merging features, please refer the advanced usage section.
GitHub Examples
You may easily run the code above and see the feature in action in our GitHub examples:
- GroupDocs.Merger for .NET examples, plugins and showcase
- GroupDocs.Merger for Java examples, plugins and showcase
Free Online App
Along with full featured Java library we provide simple, but powerful free Apps. You are welcome to merge your documents with our free online GroupDocs Merger App.