Merge and split documents with GroupDocs.Merger Leave feedback
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GroupDocs.Merger combines documents and rearranges their pages — join, split, extract, remove, reorder, rotate — and manages document passwords. It works on Word, PDF, spreadsheets, presentations, images and archives.
Every example below opens contract.docx and is ready to copy into a project once you have installed the package.
join appends another document to the one you opened. Call it repeatedly to combine several, then save the result.
import com.groupdocs.merger.Merger;
Merger merger = new Merger("contract.docx");
merger.join("statement-of-work.docx");
// Merger.save resolves a bare relative name oddly, so pass an absolute path
merger.save(new java.io.File("merger-join-documents.docx").getAbsolutePath());
contract.docx and statement-of-work.docx are the sample files used in this example. Download contract.docx and statement-of-work.docx.
Binary file (DOCX, 15 KB)
split breaks one document into several. With SplitMode.Pages and a list of page numbers, each listed page is written out as its own file — here every page of the three-page contract lands separately in the merger-split-pages folder.
import com.groupdocs.merger.Merger;
import com.groupdocs.merger.domain.options.SplitMode;
import com.groupdocs.merger.domain.options.SplitOptions;
Merger merger = new Merger("contract.docx");
// {0} is replaced with the page number, so page 1 becomes page_1.docx
int[] pageNumbers = new int[] { 1, 2, 3 };
SplitOptions splitOptions = new SplitOptions(
"merger-split-pages/page_{0}.docx", pageNumbers, SplitMode.Pages);
merger.split(splitOptions);
contract.docx is the sample file used in this example. Click here to download it.
merger-split-pages/page_1.docx (14 KB)
merger-split-pages/page_2.docx (10 KB)
merger-split-pages/page_3.docx (8 KB)
getDocumentInfo reports the format, page count and size — worth checking before you split a document into pages that may not exist.
import com.groupdocs.merger.Merger;
import com.groupdocs.merger.domain.result.IDocumentInfo;
Merger merger = new Merger("contract.docx");
IDocumentInfo info = merger.getDocumentInfo();
System.out.println("File type: " + info.getType().getFileFormat());
System.out.println("Pages: " + info.getPageCount());
System.out.println("Size: " + info.getSize() + " bytes");
contract.docx is the sample file used in this example. Click here to download it.
File type: Microsoft Word Open XML Document
Pages: 3
Size: 15096 bytes
GroupDocs.Merger also removes, moves, swaps and rotates pages, changes page orientation, adds, updates and removes document passwords, generates page previews, and offers a page builder for chaining operations.
- GroupDocs.Merger for Java documentation — the full product guide
- Supported file formats
- API reference
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