Developing Managerial Skills In Engineers And Scientists Pdf Merge

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In the previous chapter, we have seen how to split a given PDF document into multiple documents. Let us now learn how to merge multiple PDF documents as a single document.

Developing Managerial Skills In Engineers And Scientists Pdf Merge Pdf

Merging Multiple PDF Documents

You can merge multiple PDF documents into a single PDF document using the class named PDFMergerUtility class, this class provides methods to merge two or more PDF documents in to a single PDF document.

Following are the steps to merge multiple PDF documents.

Step 1: Loading an Existing PDF Document

Load an existing PDF document using the static method load() of the PDDocument class. This method accepts a file object as a parameter, since this is a static method you can invoke it using class name as shown below.

Step 2: Instantiating the PDFMergerUtility class

Developing managerial skills in engineers and scientists pdf merge pdf

instantiate the merge utility class as shown below.

Step 3: Setting the destination file

Set the destination files using the setDestinationFileName() method as shown below.

Step 4: Setting the source files

Set the source files using the addSource() method as shown below.

Step 5: Merging the documents

Mergr the documents using the mergeDocuments() method of the PDFmerger class as shown below.

Step 6: Closing the Document

Finally close the document using close() method of PDDocument class as shown below.

Example

Suppose, we have two PDF documents — sample1.pdf and sample2.pdf, in the path C:PdfBox_Examples as shown below.

This example demonstrates how to merge the above PDF documents. Here, we will merge the PDF documents named sample1.pdf and sample2.pdf in to a single PDF document merged.pdf. Save this code in a file with name MergePDFs.java.

Compile and execute the saved Java file from the command prompt using the following commands.

Upon execution, the above program encrypts the given PDF document displaying the following message.

If you verify the given path, you can observe that a PDF document with name merged.pdf is created and this contains the pages of both the source documents as shown below.